{"id":22506,"date":"2026-10-27T16:52:00","date_gmt":"2026-10-27T08:52:00","guid":{"rendered":"https:\/\/nkmceramic.com\/?p=22506"},"modified":"2026-10-27T16:52:00","modified_gmt":"2026-10-27T08:52:00","slug":"why-is-sic-so-strong","status":"publish","type":"post","link":"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/","title":{"rendered":"Why is Silicon Carbide So Strong? Exploring Its Hardness and Strength"},"content":{"rendered":"<p>SiC is regarded as one of the most versatile advanced ceramics used today. Its excellent durability makes it chosen whenever there are tough working conditions. Whether in seals for pumps or lining for furnaces, SiC survives for much longer than metal or plastic ones.<\/p>\n<p>Have you ever wondered about the reasons for such high SiC durability? And could its hardness and strength be advantageous for your particular industrial process? \u00a0This article explains silicon carbide hardness and strength, and where this material delivers the greatest value in practical operations.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar tabela de conte\u00fado\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Why_is_Silicon_Carbide_So_Hard\" >Why is Silicon Carbide So Hard?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#The_Crystal_Structure\" >The Crystal Structure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Mohs_Hardness_Rating_and_Vickers_Hardness_Values\" >Mohs Hardness Rating and Vickers Hardness Values<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#How_SiC_Hardness_Compares_to_Other_Materials\" >How SiC Hardness Compares to Other Materials?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#The_Strength_Properties_of_Silicon_Carbide\" >The Strength Properties of Silicon Carbide<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Flexural_Strength_of_Silicon_Carbide\" >Flexural Strength of Silicon Carbide<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Compressive_Strength_and_Load-Bearing_Capacity\" >Compressive Strength and Load-Bearing Capacity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#High-Temperature_Strength\" >High-Temperature Strength<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Factors_That_Affect_SiC_Hardness_and_Strength\" >Factors That Affect SiC Hardness and Strength<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Manufacturing_Process_Differences\" >Manufacturing Process Differences<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Sintered_Silicon_Carbide_SSiC\" >Sintered Silicon Carbide (SSiC)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Reaction-Bonded_Silicon_Carbide_SiSiC_RBSiC\" >Reaction-Bonded Silicon Carbide (SiSiC \/ RBSiC)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Recrystallized_Silicon_Carbide_RSiC\" >Recrystallized Silicon Carbide (RSiC)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Grain_Size_Material_Purity\" >Grain Size &amp; Material Purity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Density_Porosity\" >Density &amp; Porosity<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Industrial_Applications_Where_SiC_Strength_Matters\" >Industrial Applications:\u00a0Where SiC Strength Matters?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Mechanical_Seal_Faces_for_Pumps_and_Mixers\" >Mechanical Seal Faces for Pumps and Mixers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Wear-Resistant_Liners_and_Chute_Components\" >Wear-Resistant Liners and Chute Components<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#High-Temperature_Kiln_Furniture_and_Structural_Parts\" >High-Temperature Kiln Furniture and Structural Parts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Semiconductor_Processing_Components\" >Semiconductor Processing Components<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#How_You_Benefit_from_Specifying_SiC\" >How You Benefit from Specifying SiC?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#FAQs\" >FAQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/nkmceramic.com\/pt\/why-is-sic-so-strong\/#Reference\" >Reference<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"Why_is_Silicon_Carbide_So_Hard\"><\/span><strong><b>Why is Silicon Carbide So Hard?<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hardness is the most well-known property of silicon carbide. Understanding this helps explain why SiC resists wear so effectively.<\/p>\n<p>If you do not really know silicon carbide, <a href=\"https:\/\/nkmceramic.com\/what-is-silicon-carbide-ceramic-materials\/\"><u>our previous article<\/u><\/a>\u00a0may be helpful.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"The_Crystal_Structure\"><\/span><strong><b>The Crystal Structure<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Each silicon atom connects to four carbon atoms, and each carbon atom connects to four silicon atoms. These are strong covalent bonds. Breaking them requires enormous energy \u2014 which makes them resist surface abrasion far better than metallic ones.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mohs_Hardness_Rating_and_Vickers_Hardness_Values\"><\/span><strong><b>Mohs Hardness Rating and Vickers Hardness Values<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>On the Mohs hardness scale, silicon carbide ranks 9.2~9.5.<sup>[1]<\/sup>\u00a0For reference, diamond scores a perfect 10, and boron carbide sits around 9.6. This means SiC is among the hardest industrially available engineering materials.<\/p>\n<p><strong><b>Further Reading:<\/b><\/strong>\u00a0<a href=\"https:\/\/nkmceramic.com\/silicon-carbide-hardness\/\"><u>The Hardness of Silicon Carbide: A Complete Technical Guide for Industrial Applications<\/u><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_SiC_Hardness_Compares_to_Other_Materials\"><\/span><strong><b>How SiC Hardness Compares to Other Materials?<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To better understand these numbers, consider some common industrial materials.<\/p>\n<ul>\n<li><b><\/b><strong><b>Aluminum oxide<\/b><\/strong>ceramic has a Mohs hardness of 9.0.<\/li>\n<li><b><\/b><strong><b>Hardened steel<\/b><\/strong>has an index ranging from 5.5 to 8.0.<\/li>\n<\/ul>\n<p>This means using silicon carbide makes wear-facing parts have a longer service life and fewer replacements.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Strength_Properties_of_Silicon_Carbide\"><\/span><strong><b>The Strength Properties of Silicon Carbide<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Strength defines how SiC performs under mechanical loads.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Flexural_Strength_of_Silicon_Carbide\"><\/span><strong><b>Flexural Strength of Silicon Carbide<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Flexural strength, or modulus of rupture, measures resistance to bending. High-quality sintered silicon carbide typically shows flexural strength of 350~450 MPa at room temperature.<sup>[1]<\/sup>\u00a0These values exceed many stainless steels and cast irons.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Compressive_Strength_and_Load-Bearing_Capacity\"><\/span><strong><b>Compressive Strength and Load-Bearing Capacity<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Silicon carbide excels under compression. Its compressive strength exceeds 3,000 MPa, far surpassing most metals. This makes silicon carbide perfect for load-bearing kiln furniture, support beams, and structural plates, because its surfaces under heavy contact pressure resist crushing and deformation.<\/p>\n<figure id=\"attachment_22507\" aria-describedby=\"caption-attachment-22507\" style=\"width: 1280px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/1-Silicon-Carbide-Beams-For-Ceramic-Sintering-Application.jpg\" class=\"size-full wp-image-22507 lazyload\" alt=\"Silicon Carbide Beams For Ceramic Sintering Application\" width=\"1280\" height=\"720\"><figcaption id=\"caption-attachment-22507\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-22507\" src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/1-Silicon-Carbide-Beams-For-Ceramic-Sintering-Application.jpg\" alt=\"Silicon Carbide Beams For Ceramic Sintering Application\" width=\"1280\" height=\"720\" srcset=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/1-Silicon-Carbide-Beams-For-Ceramic-Sintering-Application.jpg 1280w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/1-Silicon-Carbide-Beams-For-Ceramic-Sintering-Application-768x432.jpg 768w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/1-Silicon-Carbide-Beams-For-Ceramic-Sintering-Application-18x10.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/noscript> Silicon Carbide Beams For Ceramic Sintering Application<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"High-Temperature_Strength\"><\/span><strong><b>High-Temperature Strength<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sintered silicon carbide retains most of its room-temperature strength up to 1,400\u2103 in air. In contrast, most metals lose strength significantly above 400 to 600\u2103.<sup>[<\/sup><sup>3<\/sup><sup>]<\/sup>\u00a0Silicon carbide does not soften under load at typical furnace operating temperatures, making it important for high-temperature process equipment.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Factors_That_Affect_SiC_Hardness_and_Strength\"><\/span><strong><b>Factors That Affect SiC Hardness and Strength<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Different manufacturing choices shape the final properties of silicon carbide. Understanding these factors helps you select the right material.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Manufacturing_Process_Differences\"><\/span><strong><b>Manufacturing Process Differences<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>3 main processes dominate the industrial ceramics market. Each has distinct strengths and limits.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Sintered_Silicon_Carbide_SSiC\"><\/span><strong><b>Sintered Silicon Carbide (SSiC)<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/nkmceramic.com\/what-is-pssic\/\"><u>Pressureless sintered silicon carbide<\/u><\/a>\u00a0starts with ultra-fine SiC powder mixed with small amounts of sintering aids. SSiC contains almost no free silicon and achieves near-full density. It delivers the highest hardness, best corrosion resistance, and greatest high-temperature strength of all SiC grades.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Reaction-Bonded_Silicon_Carbide_SiSiC_RBSiC\"><\/span><strong><b>Reaction-Bonded Silicon Carbide (SiSiC \/ RBSiC)<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/nkmceramic.com\/what-is-rbsic\/\"><u>RBSiC<\/u><\/a>\u00a0begins with a porous preform of SiC powder and carbon. This process produces parts with 8~15% free silicon content.<\/p>\n<p>The free silicon reduces maximum service temperature and chemical resistance. But it helps lower production cost and enables larger, more complex shapes.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Recrystallized_Silicon_Carbide_RSiC\"><\/span><strong><b>Recrystallized Silicon Carbide (RSiC)<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Recrystallized SiC is formed at very high temperatures without sintering aids. RSiC offers excellent thermal shock resistance and very high temperature capability. It is the preferred choice for kiln furniture and high-temperature applications.<sup>[<\/sup><sup>2<\/sup><sup>]<\/sup><\/p>\n<figure id=\"attachment_22508\" aria-describedby=\"caption-attachment-22508\" style=\"width: 1280px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/2-RSiC-Plates-Used-for-Kiln-Furniture.jpg\" class=\"size-full wp-image-22508 lazyload\" alt=\"RSiC Plates Used for Kiln Furniture\" width=\"1280\" height=\"720\"><figcaption id=\"caption-attachment-22508\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-22508\" src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/2-RSiC-Plates-Used-for-Kiln-Furniture.jpg\" alt=\"RSiC Plates Used for Kiln Furniture\" width=\"1280\" height=\"720\" srcset=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/2-RSiC-Plates-Used-for-Kiln-Furniture.jpg 1280w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/2-RSiC-Plates-Used-for-Kiln-Furniture-768x432.jpg 768w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/2-RSiC-Plates-Used-for-Kiln-Furniture-18x10.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/noscript> RSiC Plates Used for Kiln Furniture<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Grain_Size_Material_Purity\"><\/span><strong><b>Grain Size &amp; Material Purity<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Finer grain size generally produces higher hardness and strength in sintered ceramics. Purity also matters because impurities will reduce high-temperature stability.<\/p>\n<p>High-purity grades cost more but deliver better performance in demanding semiconductor and chemical applications.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Density_Porosity\"><\/span><strong><b>Density &amp; Porosity<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Higher density correlates directly with higher strength and hardness. Porosity creates stress concentrations that reduce load-bearing capacity and accelerate wear.<\/p>\n<p>Sintered SiC typically reaches 98% or more of theoretical density. RBSiC is also nearly fully dense, but with free silicon filling the pores. RSiC is more porous for better thermal shock performance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Industrial_Applications_Where_SiC_Strength_Matters\"><\/span><strong><b>Industrial Applications<\/b><\/strong><strong><b>:<\/b><\/strong><strong><b>\u00a0Where SiC Strength Matters<\/b><\/strong><strong><b>?<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You can find silicon carbide components wherever conditions push ordinary materials to their limits. With its good hardness and strength, silicon carbide delivers value across many sectors.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mechanical_Seal_Faces_for_Pumps_and_Mixers\"><\/span><strong><b>Mechanical Seal Faces for Pumps and Mixers<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Mechanical seals rely on ultra-flat, wear-resistant mating faces. You benefit from <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-seal-ring\/\"><u>SiC seal faces<\/u><\/a>\u00a0in pumps handling corrosive fluids, abrasive slurries, or high-pressure process streams.<\/p>\n<p>SiC possesses extreme hardness. It maintains surface finish over thousands of operating hours. Its high strength resists cracking from pressure shocks.<sup>[<\/sup><sup>2<\/sup><sup>]<\/sup><\/p>\n<p>For chemical processing, sintered SiC handles acids, bases, and solvents that would destroy carbon or tungsten carbide seals.<\/p>\n<figure id=\"attachment_22509\" aria-describedby=\"caption-attachment-22509\" style=\"width: 1280px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/3-SiC-Mechanical-Seals-for-Pump-Uses.jpg\" class=\"size-full wp-image-22509 lazyload\" alt=\"SiC Mechanical Seals for Pump Uses\" width=\"1280\" height=\"720\"><figcaption id=\"caption-attachment-22509\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-22509\" src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/3-SiC-Mechanical-Seals-for-Pump-Uses.jpg\" alt=\"SiC Mechanical Seals for Pump Uses\" width=\"1280\" height=\"720\" srcset=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/3-SiC-Mechanical-Seals-for-Pump-Uses.jpg 1280w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/3-SiC-Mechanical-Seals-for-Pump-Uses-768x432.jpg 768w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/3-SiC-Mechanical-Seals-for-Pump-Uses-18x10.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/noscript> SiC Mechanical Seals for Pump Uses<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Wear-Resistant_Liners_and_Chute_Components\"><\/span><strong><b>Wear-Resistant Liners and Chute Components<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When abrasive materials slide or impact surfaces, wear becomes a major concern. You can line chutes, cyclones, and conveying systems with <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-tile\/\"><u>silicon carbide tiles<\/u><\/a>\u00a0to extend service life.<\/p>\n<p>Silicon carbide outlasts rubber liners and hardened steel by 5~20 times in heavy abrasion duties. Their high compressive strength handles impact from large falling particles without cracking.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"High-Temperature_Kiln_Furniture_and_Structural_Parts\"><\/span><strong><b>High-Temperature Kiln Furniture and Structural Parts<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Inside industrial kilns, temperatures can exceed 1,500\u2103. Metal fixtures warp and fail at these temperatures, but <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-beam\/\"><u>silicon carbide beams<\/u><\/a>, <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-plates\/\"><u>plates<\/u><\/a>, and <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-crucible\/\"><u>crucibles<\/u><\/a>\u00a0remain stable.<\/p>\n<p>You gain significant production efficiency by using SiC kiln furniture. Its high strength at high temperature allows thinner, lighter support. Thinner parts heat faster and use less energy, increasing your kiln throughput and reducing operating costs.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Semiconductor_Processing_Components\"><\/span><strong><b>Semiconductor Processing Components<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Semiconductor wafer fabrication demands extreme purity and dimensional stability at high temperatures. SiC tubes, <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-parts\/\"><u>wafer carriers<\/u><\/a>, and process chambers can all be used inside diffusion and deposition furnaces.<\/p>\n<p>High strength and low thermal expansion ensure parts maintain tight tolerances through repeated thermal cycles. Its purity prevents contamination that would ruin expensive silicon wafers.<\/p>\n<figure id=\"attachment_22510\" aria-describedby=\"caption-attachment-22510\" style=\"width: 1280px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/4-Newthink-Silicon-Carbide-Wafer-Carriers-Left.jpg\" class=\"size-full wp-image-22510 lazyload\" alt=\"Newthink Silicon Carbide Wafer Carriers (Left)\" width=\"1280\" height=\"720\"><figcaption id=\"caption-attachment-22510\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-22510\" src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/4-Newthink-Silicon-Carbide-Wafer-Carriers-Left.jpg\" alt=\"Newthink Silicon Carbide Wafer Carriers (Left)\" width=\"1280\" height=\"720\" srcset=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/4-Newthink-Silicon-Carbide-Wafer-Carriers-Left.jpg 1280w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/4-Newthink-Silicon-Carbide-Wafer-Carriers-Left-768x432.jpg 768w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/10\/4-Newthink-Silicon-Carbide-Wafer-Carriers-Left-18x10.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/noscript> Newthink Silicon Carbide Wafer Carriers (Left)<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"How_You_Benefit_from_Specifying_SiC\"><\/span><strong><b>How You Benefit from Specifying SiC?<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Regardless of which process you use silicon carbide in, you can reduce your total cost of ownership. Longer service life means fewer changeouts, less downtime, and lower maintenance labor.<sup>[4<\/sup><sup>]<\/sup><\/p>\n<p>SiC also improves process reliability. Components that maintain their shape and surface finish keep your equipment running within specification. This consistency reduces scrap rates and improves product quality across your operations.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><strong><b>FAQs<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><b>Does silicon carbide break easily?<\/b><\/strong><\/p>\n<p>Silicon carbide is brittle. It handles compressive and sliding loads very well, but can crack under sharp impact or extreme tensile stress.<\/p>\n<p><strong><b>Can silicon carbide scratch diamond?<\/b><\/strong><\/p>\n<p>No. Diamond remains the hardest known material at Mohs 10. It will scratch SiC, but not the reverse.<\/p>\n<p><strong><b>Is silicon carbide stronger than steel?<\/b><\/strong><\/p>\n<p>By weight, yes. It has higher compressive strength, higher hardness, and better strength retention at high temperatures.<\/p>\n<p><strong><b>What is the maximum temperature for silicon carbide?<\/b><\/strong><\/p>\n<p>Sintered SiC remains stable in air up to about 1,600\u2103. In inert atmospheres, SiC can withstand temperatures above 2,000\u2103.<\/p>\n<p><strong><b>Does silicon carbide conduct electricity?<\/b><\/strong><\/p>\n<p>Standard silicon carbide ceramic is a semiconductor. Special formulations can be made more conductive for specific applications like heating elements.<\/p>\n<p><strong><b>How to machine silicon carbide if it is so hard?<\/b><\/strong><\/p>\n<p>Silicon carbide parts are shaped by diamond grinding, lapping, and polishing. Most shaping happens in the green state before sintering to reduce machining time.<\/p>\n<p><strong><b>Is silicon carbide expensive?<\/b><\/strong><\/p>\n<p>Silicon carbide costs more than basic alumina ceramics but less than zirconia or advanced nitride ceramics in many cases. However, SiC almost always delivers lower total cost than cheaper materials in harsh environments due to its durability.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong><b>Conclusion<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Silicon carbide is hard and strong, making it one of the most reliable material choices for demanding industrial environments. When you specify silicon carbide components for seals, liners, kiln furniture, or process equipment, the specific grade you choose matters greatly.<\/p>\n<p>Still confused about which grades of silicon carbide to choose, or if your industry is suitable for changing to silicon carbide? <a href=\"https:\/\/nkmceramic.com\/\"><u>Newthink New Materials<\/u><\/a>\u00a0is a professional SiC supplier and manufacturer. <a href=\"https:\/\/nkmceramic.com\/contact-us\/\"><u>Contact us<\/u><\/a>\u00a0with your needs; our technical team can help you.<\/p>\n<p>Thanks for your reading. Hope this article will be helpful.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Reference\"><\/span><strong><b>Reference<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>[1] <a href=\"https:\/\/www.mdpi.com\/2227-9717\/12\/12\/2696\"><u>Fan, Z., Zhang, J., Wang, Z., Shan, C., Huang, C., &amp; Wang, F. (2024). A state-of-the-art review of fracture toughness of silicon carbide: implications for high-precision laser dicing techniques. <\/u><em><u><i>Processes<\/i><\/u><\/em><u>, <\/u><em><u><i>12<\/i><\/u><\/em><u>(12), 2696.<\/u><\/a><\/p>\n<p>[2] <a href=\"https:\/\/link.springer.com\/article\/10.1007\/s12633-022-01998-9\"><u>Manikandan, E., &amp; Agarwal, L. (2022). A comprehensive review of recent progress, prospect and challenges of silicon carbide and its applications. <\/u><em><u><i>Silicon<\/i><\/u><\/em><u>, <\/u><em><u><i>14<\/i><\/u><\/em><u>(18), 12887-12900.<\/u><\/a><\/p>\n<p>[3] <a href=\"https:\/\/www.mdpi.com\/1996-1073\/16\/3\/1176\"><u>Yan, Z., Liu, R., Liu, B., Shao, Y., &amp; Liu, M. (2023). Molecular dynamics simulation studies of properties, preparation, and performance of silicon carbide materials: a review. <\/u><em><u><i>Energies<\/i><\/u><\/em><u>, <\/u><em><u><i>16<\/i><\/u><\/em><u>(3), 1176.<\/u><\/a><\/p>\n<p>[4] <a href=\"https:\/\/www.mdpi.com\/1420-3049\/31\/7\/1185\"><u>Zhambakin, D., Abilev, M., Zhilkashinova, A., Ichshanova, A., &amp; \u0141atka, L. (2026). Silicon carbide ceramics for armor applications: A review of sintering methods and additive systems. <\/u><em><u><i>Molecules<\/i><\/u><\/em><u>, <\/u><em><u><i>31<\/i><\/u><\/em><u>(7), 1185.<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>SiC is regarded as one of the most versatile advanced ceramics used today. Its excellent durability makes it chosen whenever there are tough working conditions. Whether in seals for pumps or lining for furnaces, SiC survives for much longer than metal or plastic ones. Have you ever wondered about the [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":22507,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"disabled","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-22506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why is Silicon Carbide So Strong? 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