Ceramic coating technology knowledge

2016-09-12

First, A metallic ceramic coatings Profile

Metallic ceramic coating is applied to the metal surface means heat-resistant inorganic protective layer or surface film in general. He can change the morphology, structure and chemical metal bottom outer surface of the material, and give a new base material properties. Many types of coating; can be divided according to their composition of the silicate-based coating, oxide coating, non-oxide coatings and composite ceramic coating, etc., according to the process can be divided into melting coating, spray coating , vapor deposition and diffusion coatings, low-temperature baking coating, electrochemical coating process, the sol - gel coating in situ and in situ reaction coatings; it can be divided according to their performance and use temperature control coatings (including temperature, heat, infrared radiation coating, etc.), heat-resistant coating (including high temperature oxidation, corrosion resistance, heat protection coatings, etc.), the friction coating (including anti-friction, wear and lubrication coating), electrical properties coatings (including conductive, insulating coating, etc.), special properties of the coating (including electromagnetic wave absorption, anti-atomic radiation coating, etc.) and process performance coatings.

Second, the preparation of metal-based ceramic coating technology

1. Spraying (plasma spraying)

2. Chemical vapor deposition (CVD): at a relatively high temperature, the mixed gas and the substrate surface interaction, so that the decomposition of certain components of the mixed gas, and the substrate surface to form a solid thin film layer of a metal or compound.

3. Physical vapor deposition (PVD): ion plating, sputtering, vapor deposition, ion implantation, etc., of the coating is more dense plasma. Currently CVD and PVD boundaries are obvious, both mutual penetration, CVD technology into the plasma activation and other physical processes, there has been PACVD technology, PVD technology is introduced into the reaction gas produced chemical process.

4. Composite Coatings

5. Sol - gel method

6. Situ reaction

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