Titanium alloy surface ceramic/metal gradient high-temperature composite coating and preparing method thereof

• Main Authors: ZHU JIYUN, DAI JINGJIE, LI SHOUYING, ZHANG FENGYUN, HOU SHUNQIANG, WANG AMIN, ZHAI MINGGE, ZHUANG LEI
• Format: Patent
• Language: Chinese; English
• Published: 29.06.2016
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention relates to a titanium alloy surface ceramic/metal gradient high-temperature composite coating and a preparing technology. A titanium alloy serves as a matrix of the coating, an Al-Nb-Si alloy serves as a target material, and the gradient high-temperature composite coating is prepared through arc glow plasma. The gradient high-temperature composite coating is composed of two parts, an inner layer of the coating has the good high temperature oxidation resistance performance and is an aluminum-rich Ti-Al-Nb-Si multi-component alloying metal layer in good thermal physical performance cooperation with the matrix, an outer layer of the coating is a ceramic layer with titanium and aluminum nitride as the main part, the ceramic layer has the good high temperature oxidation resistance performance and the frictional wear performance, and chemical components of the coating are gradually changed in a gradient manner. The gradient high-temperature composite coating has the good high temperature oxidation res