期刊
CORROSION SCIENCE
卷 144, 期 -, 页码 13-34出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.07.013
关键词
NiCoCrAlTaY coating; TGO growth rate; Al(2)O(3)layer; Oxidation resistance
资金
- Universiti Teknologi Malaysia (UTM) [Q.J130000.2524.16H35, R.J130000.7324.4B300]
In this research, the effects of thin Al2O3 diffusion barrier layer (including Y-containing small oxide precipitates) and nanostructured YSZ top coat on the high temperature oxidation behavior of HVOF NiCoCrAlTaY/APS YSZ coatings were examined by using isothermal oxidation tests at 1100 degrees C. Nanostructured YSZ top coat could slightly reduce the double layered TGO growth rate and weight gain of thermal barrier coating systems. However, Al2O3 diffusion barrier layer (consisting of Y-containing small oxide precipitates) could substantially decline the oxidation rate and Ta movement (Ta-enriched oxides formation) in the NiCoCrAlTaY/Al2O3/nanostructured YSZ coating at 1100 degrees C.
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