Carbide Coating Preparation

here are many carbide coating preparation methods, including vapor deposition, thermal spraying,  chemical and heat treatment. Good quality coatings prepared by vapor deposition, has gradually become the dominant carbide coating preparation methods. Vapor deposition technology is divided into chemical vapor deposition and physical vapor deposition.

1. Chemical vapor deposition (CVD).Chemical vapor deposition are atomic deposition class, is a pioneer in the use of gaseous reactants to generate solid coating by way of a chemical reaction between atomic and molecular techniques. Based on this characteristic, CVD process mostly at a relatively high pressure and high deposition temperature environment. Because a higher pressure helps to improve the deposition rate of the coating of a higher deposition temperature can ensure the smooth progress of chemical reactions.

2. Physical vapor deposition (PVD).Physical vapor deposition is the use of a physical process (such as by evaporation or sputtering material when particle bombardment substance atoms on the surface and other phenomena) between the material atoms from the source material to the deposited coating controllable transfer process, the atoms in the molecule depositing a coating on the scale.

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