期刊
CERAMICS INTERNATIONAL
卷 45, 期 15, 页码 18899-18907出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.06.125
关键词
Doping; ZrO2/YSZ; Al2O3 coating; TiAl alloy; CPED
资金
- Science and Technology Program for Research and Development of Shaanxi Province [2018JZ5004]
ZrO2/yttria-stabilized zirconia (YSZ) doping Al2O3 ceramic coating was fabricated via cathodic plasma electrolytic deposition (CPED) technique. The microstructures and the chemical and phase compositions of the doped coating were characterized, the mechanical properties and the high temperature oxidation resistance were evaluated, and the doping mechanism was also discussed in detail. The results showed that, doped Zr4+ and Y3+ ions could effectively reduce the working voltage during CPED process and increase the content of metastable gamma-Al2O3 in the coating. Accordingly, the doped ZrO2/YSZ significantly refined the grain size of Al2O3, as well as remarkably improved the high temperature oxidation resistance, the micro-structural compactness and hardness of the Al2O3 CPED coating. This study displayed here constructed an efficiently method for the fabrication of multifunctional coating on the surface of TiAl alloy.
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