How to make silicon carbide ceramics?

Ceramic product is a more exquisite handicraft, which has been applied in many places in our life. It is a high-tech product, which needs to be tested layer by layer before it can enter our sight. Next, let's talk about the manufacturing methods of silicon carbide ceramics and the advantages of these products. Let more people around you be familiar with this kind of products.

First, how to make silicon carbide ceramics?

1, ceramic products are fragile, so we choose more sophisticated technology to improve this shortcoming. The results show that the use of B and C alone as additives is not conducive to the complete densification of SiC ceramics. Only by adding B and C at the same time can the density of SiC ceramics be increased. For the compact sintering of SiC, the specific surface area of SiC powder should be above 65438+1100m2/g and the oxygen content should be as low as possible.

Our products are obtained by hot pressing and sintering. So it is more durable. In the mid-1950s, some researchers used Al2O3 as additives, others used B4C, B or B and C, Al2O3 and C, Al2O3 and Y2O3, Be, B4C and C as additives respectively, and dense SiC ceramics were also obtained by hot pressing sintering.

3. We have to go through layers of processes to realize hot isostatic pressing sintering. With the continuous advent of scientific and technological products, in order to further improve the mechanical properties of SiC ceramics, researchers have carried out research on hot isostatic pressing technology of SiC ceramics. At 1900℃, high-density SiC sintered body was obtained. Through this process, the dense sintering of SiC ceramics without additives was successfully realized at 2000℃ and 65438±038 MPa.

What are the advantages of silicon carbide ceramics?

1, our advantage is that the ultimate speed is higher and it will not be particularly laborious: ceramics are lighter than steel and are suitable for large products. Will reduce the centrifugal force of operation, thus increasing the limit speed with the same accuracy. High-precision occasions: the hardness and Young's modulus of ceramics are higher than those of steel, and the mechanical deformation is smaller under the same load, so it can be applied to more precise occasions.

Our products are durable and will not be damaged frequently. Compared with steel bearings, it can be extended up to 5 times, reducing centrifugal force and raceway load. Moreover, because the friction coefficient of ceramics is smaller than that of steel, it can reduce the running temperature rise, reduce the friction loss and prolong the raceway life.

3. Our high temperature test has reached the extreme of similar products, which is worthy of recognition. Therefore, it can be used in the field of high temperature. More adaptive to temperature changes: because the thermal expansion coefficient of ceramics is smaller than that of steel, the clearance of ceramic bearings is less affected by temperature changes than that of steel bearings, so it can be used in a wider temperature fluctuation range.

The above article is an introduction of how to make silicon carbide ceramics, and it also talks about many advantages. I hope that when you choose materials, you can also learn from the advantages mentioned by Bian Xiao.