Silicon carbide coating refers to the preparation of SIC coating on the surface of parts by physical or chemical vapor deposition, spraying and other methods.
SiC has excellent physical and chemical properties, such as high melting point, high hardness, corrosion resistance, oxidation resistance, especially in the 1800-2000℃ range, with good ablative performance, therefore, in aerospace, weapons equipment and other fields have broad application prospects. However, SiC itself cannot be used as a structural material, so the method of preparing coatings is usually used to take advantage of its wear resistance and ablative resistance.
Common methods for preparing coatings
1. Chemical Vapor Deposition (CVD)
The sample to be prepared SiC coating was put into the reaction tube, and the SiC coating was deposited on the surface of the sample under the condition of 950-1300℃ and negative pressure with MTS as the precursor material.
2, precursor conversion method (PIP)
After the sample was pre-treated, the sample was put into the impregnation tank, the impregnation tank was vacuumed, the impregnation solution was injected, and the sample was taken out under pressure. After cracking in the furnace and cooling to room temperature, the SiC coating can be achieved on the surface of the sample. The impregnation solution here is the solution of ceramic precursor as the main component.
Post time: Sep-02-2023