In the production of coated fabrics, coating technology is an essential part of determining the properties of the material.
Standard coating techniques include Chemical vapor deposition, organic composite sintering, and activated carbon fiber conversion, and today Heaterk will introduce Chemical vapor deposition.
Chemical Vapor Deposition Production Principle
A chemical reaction occurs at a specific temperature by mixing trimethylchlorosilane (such as methyl trichlorosilane) compound gas with hydrogen. The generated SiC crystallites are deposited on a substrate such as fine tungsten wire or carbon fiber and then heat-treated to obtain Composite SiC fibers with core material.
Chemical vapor deposition makes the compound contact with the part to be treated in the form of gas. Under certain conditions, the compound in the gas phase will undergo pyrolysis or chemical reaction with each other, and the reactant will be deposited on the surface of the part to be coated in solid form. Become a coating.
The most basic chemical vapor deposition apparatus consists of 2 heating zones.
The first area has a lower temperature, which maintains the evaporation of the coating material source and keeps its vapor pressure unchanged; the second area is a high-temperature area, which causes the compounds in the gas to decompose and react, and the carrier gas carries the material source vapor from the evaporation area, into the reaction zone.
The substrate refers to the solid to which the deposit is attached. The material must withstand the deposition temperature and not react with gaseous substances. When the thickness of the deposit is small, it can be attached to the substrate as a coating for the substrate.
At this time, the promise and the substrate are required to have good When the thickness of the deposit is large, it can be peeled off from the substrate as an independent part. At this time, a material with a more significant expansion coefficient than the deposit can be selected as the substrate.
Compared with available coating materials, the coated glass fiber fabric made of Chemical Vapor Deposition has excellent adhesion, regardless of oxidation resistance, wear resistance, or flame puncture resistance. Promote.
Learn more about coating technology or need a high-performance coating material. Get in touch with the Heaterk team, and we'll be happy to help.