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The Material Structure and Properties of Silicon Carbide Sintered at Atmospheric Pressure
Among modern high-tech refractory raw materials such as C, N, and B—non-oxide compounds—pressureless-sintered silicon carbide is widely used and economically viable; it can be considered a type of carborundum or refractory abrasive sand. Pure silicon carbide is a colorless, transparent crystal. So what exactly are the material structure and properties of silicon carbide? Let’s take a closer look at pressureless-sintered silicon carbide below!
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2022
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Main Components and Applications of Atmospheric-Pressure Sintered Silicon Carbide
Pressureless-sintered silicon carbide is a nonmetallic carbide in which silicon and carbon are bonded via covalent bonds. Its hardness ranks second only to that of diamond and boron carbide. Its chemical formula is SiC. It appears as colorless crystals, but turns blue or black when its surface is oxidized or contains impurities.
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2022
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The Influence of Carbon Content on the Microstructure of Reaction-Sintered Silicon Carbide
The carbon content varies among the fracture surfaces of the sintered specimens. Within the range of a-2.5 wt.%, a dense material with virtually no porosity is formed, consisting of uniformly distributed silicon carbide particles and free silicon. As the carbon addition increases, the content of reaction-sintered silicon carbide gradually rises, the particle size of silicon carbide grows larger, and the silicon carbide particles become interconnected in a skeletal structure.
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2022
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In mechanical seals, reaction-sintered silicon carbide sealing rings are widely used, typically manufactured using the SiC+C+Si process. Having worked in this field—engaged in both technical and production roles—for many years, I often encounter questions from colleagues and engage in discussions with them. Since, during operation, the contact surfaces of mechanical sealing rings are in a semi-dry grinding state, the friction surfaces of the sealing rings must possess excellent self-lubricating properties—a feature that the SiC+C+Si process does not inherently provide.
06
2022
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Industry Development Status of Normal-Pressure Sintered Silicon Carbide
As a new type of inorganic nonmetallic material, atmospheric-pressure-sintered silicon carbide ceramic products have been widely used in fields such as kilns, desulfurization and environmental protection, chemical industry, iron and steel, and aerospace. However, the application of these atmospheric-pressure-sintered silicon carbide ceramics is still at a relatively basic stage, and many potential application areas remain largely untapped, presenting a huge market opportunity.
03
2022
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Applications of Normal-Pressure Sintered Silicon Carbide Ceramics
Pressureless sintered silicon carbide is one of the most widely used materials in structural ceramics. Thanks to its relatively low thermal expansion, high specific strength, high thermal conductivity and hardness, as well as excellent wear resistance and corrosion resistance, and importantly, its ability to maintain good performance even at high temperatures up to 1650°C, silicon carbide ceramics have found extensive applications across various fields.
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2021
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Production method of reaction-sintered silicon carbide
Reaction-sintered silicon carbide is a new type of high-tech ceramic material characterized by high strength, high hardness, excellent wear resistance, and superior corrosion resistance. It finds extensive applications in fields such as metallurgy, petrochemicals, electronics, and aerospace. This product is made by using silicon carbide abrasives along with carbon black, graphite, and various additives, and is processed into a porous structure via methods such as dry pressing, extrusion, or casting. Now, let’s take a closer look at the production process of reaction-sintered silicon carbide!
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2021
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A preparation method and process for reaction-sintered silicon carbide
With the advancement of science and technology, industries such as sealing and armor manufacturing are placing increasingly stringent demands on materials, making it urgently necessary to develop new high-performance materials. Reaction-sintered silicon carbide, with its outstanding high-temperature strength, wear resistance, corrosion resistance, and excellent electrical and thermal conductivity, has found wide application in many sectors including aerospace, machinery, and automotive. It is also an important material in the military field. So, let’s now take a closer look at the preparation method and process for reaction-sintered silicon carbide!
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2021
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Shandong Huamei New Materials Technology Co., Ltd.
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