论文部分内容阅读
在１０００～１１００℃之间，对三种Ｃｒ、Ａｌ含量及微量元素Ｓ、Ｚｒ含量不同的Ｎｉ－Ｃｒ－Ａｌ基合金进行了恒温和循环氧化实验。结果表明，高Ｃｒ（１６Ｗｔ％），低Ａｌ（３．５Ｗｔ％）、Ｓ（０．００５ｗｔ％）含量，且不含Ｚｒ的合金其氧化膜层主要由连续致密的Ｃｒ２Ｏ３外氧化层和树根状Ａｌ２Ｏ３内氧化层构成，氧化膜的粘附性较好。高Ａｌ（５ｗｔ％），低Ｃｒ（９ｗｔ％）、Ｓ（０３００５ｗｔ％）含量，且不含Ｚｒ的合金其氧化膜主要由Ａｌ２Ｏ３，ＴｉＯ２，Ｃｒ２Ｏ３构成，氧化膜的粘附性较差，但在该合金中加入０．１Ｗｔ％Ｓ和０．１Ｗｔ％Ｚｒ，氧化膜的粘附性变好，而恒温氧化速率增加。文中对实验结果进行了综合分析。
Three kinds of Ni-Cr-Al-based alloys with different contents of Cr, Al and trace elements S, Zr were subjected to constant temperature and cyclic oxidation at 1000-1100 ℃. The results show that the oxide films of high Cr (16Wt%), low Al (3.5Wt%), S (0.005wt%) and non-Zr containing alloys are mainly composed of continuous dense Cr2O3 outer layer and root Like Al2O3 oxide layer, oxide film adhesion is better. The content of Al (5wt%), low Cr (9wt%) and S (03005wt%) in the alloy containing no Zr is mainly composed of Al2O3, TiO2 and Cr2O3. However, Adding 0.1Wt% S and 0.1Wt% Zr into the alloy, the adhesion of the oxide film becomes better while the oxidation rate of the isothermal oxidation increases. In this paper, a comprehensive analysis of the experimental results.