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Thermal spray process and the ceramic coating perfect combination(二)

Author: langfeng Time: 2017-10-27

Thermal spray process and the ceramic coating perfect combination(二)

 

Most ceramic materials have ionic or covalent bond structure, high bond strength, strong atomic strength, low surface free energy, which gives the ceramic material high melting point, high stiffness, high chemical stability, high insulation capacity, thermal expansion Coefficient is small, the friction coefficient is small, but compared with the metal material, its plastic deformation ability is poor, the stress concentration and crack sensitivity. Obviously, the use of ceramic as a mechanical structure material, its reliability is worse than the metal material, mechanical processing difficulties, high cost. However, the use of thermal spraying technology, in the metal matrix on the preparation of ceramic coating, the characteristics of metal materials and ceramic materials can be organically combined to obtain composite structure. Because of this composite structure has excellent superior performance, making thermal spraying technology quickly extended from the high-point areas to the application of energy, transportation, metallurgy, textile, petrochemical, machinery and other civilian industries.

 

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