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Effect of Al Layer on Oxidation Behavior of NbCrAl Coating 被引量:1
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作者 许安 CHEN Quanzhi +2 位作者 HUANG Zujiang DONG Wanbing 李伟洲 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第2期391-396,共6页
NbCrAl coatings in the presence or absence of Al outer layer were prepared on C103 Nb based alloy and alumina substrate by direct current magnetron sputtering technique. The oxidation performance of coating systems wa... NbCrAl coatings in the presence or absence of Al outer layer were prepared on C103 Nb based alloy and alumina substrate by direct current magnetron sputtering technique. The oxidation performance of coating systems was evaluated by isothermal oxidation tests. The element diffusion and oxidation behavior of the coating systems were investigated. The results indicate that the mass gains of NbCrAl and Al/NbCrAl coatings are 2.02 mg/cm^2 and 0.79 mg/cm^2 at 1 000 ℃ for short time. Al/NbCrAl coatings exhibit more effective protection than NbCrAl coatings. The addition of Al layer can improve the oxidation resistance of NbCrAl coatings, which is attributed to the Al layer offering enough Al content to react with oxygen to form a continuous and dense Al_2O_3 scale on NbCrAl coating and it can inhibit the further internal oxidation. 展开更多
关键词 nbcral COATING ELEMENT diffusion OXIDATION behavior direct current MAGNETRON SPUTTERING
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