為什麼碳化矽材料受歡迎？

Why silicon carbide marterial popular?

Among the known high strength and high refractoriness materials, many materials are expensive new materials. As a man-made material, silicon carbide material has excellent high-temperature oxidation resistance, chemical corrosion resistance, strength, toughness and heat resistance. More importantly, after more than 100 years of development, silicon carbide has realized industrial production. Compared with other materials, it has higher cost performance.

Here are ten high hardness materials and ten high refractory materials:

List of high toughness and high strength materials:

1. Graphene: the tensile strength is 125 GPA, the elastic modulus is 1.1tpa, and the strength is 100 times that of ordinary steel.

2. Carbon nanotubes: the tensile strength is 50-200 GPA, 100 times that of steel, and the density is only one sixth of that of steel; The elastic modulus is 1 TPA, which is equivalent to diamond.

3. Metallic glass: metallic glass has good conductivity, higher strength than steel and higher hardness than high hardness tool steel.

4. Ultra high molecular weight polyethylene fiber: the strength is 15 times higher than that of steel wire, but the specific gravity is very light.

5. Boron nitride nanotubes: the strength of boron nitride nanotubes is higher than that of carbon nanotubes. The advantage is that they have good bonding ability when combined with polymer materials.

6. Lonsdale stone: it is a naturally formed meteorite, and its compressive strength is 58% higher than that of diamond paste.

7. Diamond: Mohs hardness is 10, and fiber hardness is 10000kg / mm2, 150 times higher than corundum.

8. aerogel: the world’s least dense solid, which can withstand thousands of times of its weight.

9. Silicon carbide: green silicon carbide with Mohs hardness of 9.5 and toughness twice that of corundum. At the same time, it has good high heat resistance.

10. Darwinian bark spider silk: it is the highest strength biomaterial ever studied.

List of high melting point materials:

It can be seen that silicon carbide not only has high strength and toughness at room temperature and high heat, but also has good high heat stability and high heat oxidation resistance. It is an excellent material second only to diamond in common industrial materials. Therefore, green silicon carbide and black silicon carbide are often used as auxiliary materials for new materials, wear-resistant materials, corrosion-resistant materials and new coatings. It can improve the performance of products in terms of heat, corrosion resistance, refractoriness, wear-resistance, and strength.