Oxidation of pre-oxidized GH128 alloy implanted with Ce+ at 1 000 ℃
来源期刊：中国有色金属学报(英文版)2008年第3期
论文作者：李美栓 钱余海 周延春
文章页码：493 - 498
Key words：oxidation; Ce; ion implantation; GH128 alloy
Abstract: The influence of Ce implantation into preformed scales with a dose of 1×1017 ions/cm2 on the subsequent oxidation behavior of GH128 alloy at 1 000 ℃ in air was investigated. The pre-oxidation was carried out at 1 000 ℃ in air for 1 h and 5 h respectively. Cr2O3, NiO and NiCr2O4 formed on the surface of all specimens. Ce implantation decreased the subsequent oxidation rate of both the alloy and the 1 h pre-oxidized alloy, however, had no effect on that of the 5 h pre-oxidized alloy. The beneficial effect was most obvious in the directly implanted alloy. During the cyclic oxidation for 600 h, Ce implantation for all specimens with or without preferential oxidation played a similar beneficial effect on the oxide spallation resistance. The results indicate that Ce incorporated into the oxide scales affects the diffusion of the reaction species to some extent, the wavy interface and small grain structure make a significant contribution to improving the spallation resistance of the oxide scales.
基金信息：the National Natural Science Foundation of China
