粉末冶金技术2025，Vol.43Issue(4)：400-406,7.DOI:10.19591/j.cnki.cn11-1974/tf.2025040019
稀土Ce对钴基合金抗高温氧化性和耐蚀性的影响
Effect of rare earth Ce on high temperature oxidation resistance and corrosion resistance of cobalt-based alloys
丁瑞 1张亮 1吴文恒1
作者信息
- 1. 上海材料研究所有限公司上海 3D打印材料工程技术研究中心,上海 200437
- 折叠
摘要
Abstract
Cobalt-based alloys containing different mass fractions of rare earth element Ce(0,0.04%,0.14%,0.19%)were prepared by selective laser melting technology.The influence of Ce element on high-temperature oxidation resistance and corrosion resistance was systematically discussed.The microstructure and phase composition of the alloys were analyzed by scanning electron microscopy,X-ray diffractometer,high-temperature oxidation weight gain experiment,and electrochemical test.The oxidation kinetics behavior of the alloys,the morphology of the oxide films,and the corrosion resistance of the alloys were also studied.The results show that the alloys with the mass fraction of 0.14%Ce have the best oxidation resistance at 900℃,with the lowest oxidation weight gain(only 0.179 mg·cm-2 for 100 h).The oxide film grains are significantly refined and dense,which are mainly composed of the dense Cr2O3 layers and the outermost CoCr2O4 spinel phases.The electrochemical tests show that the effect of Ce on the corrosion resistance of the alloys is not clear.关键词
钴基合金/稀土元素/高温氧化/耐蚀性/选区激光熔化Key words
cobalt-based alloys/rare earth element/high temperature oxidation/corrosion resistance/selective laser melting分类
矿业与冶金引用本文复制引用
丁瑞,张亮,吴文恒..稀土Ce对钴基合金抗高温氧化性和耐蚀性的影响[J].粉末冶金技术,2025,43(4):400-406,7.
