Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating

Zhong Du, Quan Sheng Wang*, Yan Bo Liu, Yun Kai Li

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

6 引用 (Scopus)

摘要

NiCoCrAlY bond coating was prepared by high velocity oxy-fuel (HVOF) spray and top coating was prepared by plasma spray. Pre-oxidation was conducted before the high temperature isothermal oxidation. Effect of vacuum pre-oxidation on the oxidation behavior of thermal barrier coatings was studied by high temperature static oxidation experiment. The results show that a dense and continuous α-Al2O3 film is formed after the pre-oxidation treatment. After oxidation for 800 h at 1050℃, a TGO, composed of α-Al2O3 and a large amout of spinel-type oxides, was formed in as-sprayed coating. On the contrary, a TGO, mainly composed of α-Al2O3, is formed in the coating after pre-oxidation treatment. Pre-oxidation treatment can postpone the formation of spinel oxide effectively and then slow down the growth rate of thermally grown oxide (TGO).

源语言英语
页(从-至)27-31
页数5
期刊Hangkong Cailiao Xuebao/Journal of Aeronautical Materials
35
5
DOI
出版状态已出版 - 1 10月 2015

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