期刊
CORROSION SCIENCE
卷 147, 期 -, 页码 152-162出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.11.010
关键词
Alloy; Metal coatings; Zirconium; Oxidation
资金
- National Natural Science Foundation of China [51431003, 51371145, U1435201]
- National Key R&D Program of China [2017YFB0702903]
- Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China [143-TZ-2016]
Modified silicide coatings were prepared on Ti-5Al-10Nb-xZr (x = 0, 2, 5, 10, 15 and 20 at.%) alloys by pack cementation process. The effects of Zr content on the coating structure and oxidation resistance have been investigated. With increasing Zr contents in the substrate, the coating structure shows a significant change. Adding 2 at.% Zr can improve the oxidation resistance of silicide coating due to the formation of a thin and dense SiO2 layer. But excessive Zr exerts an adverse influence on the oxidation resistance due to the volume expansion caused by the phase transformation of ZrO2 during the oxidation process.
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