华中科技大学学报（自然科学版）2011，Vol.39Issue(6)：106-110,115,6.
轻质化MA/ODS镍基高温合金高温氧化行为
High temperature oxidation behavior of low density MA/ODS nickel-based superalloy
摘要
Abstract
ODS (oxide dispersion strengthened) nickel-based superalloy with different content of nano Y2O3(2%-20%) as dispersion phase was prepared by mechanical alloying (MA) and vacuum sintering. Samples of the alloy were oxidized at 1 000 ℃ in static air for 100 h. The effect and mechanism of Y2O3 content on the high temperature oxidation performance of the alloy were investigated. The results show that appropriate amount of rare earth oxide Y2O3(≤5%) can promote the complete formation of Cr2 O3 oxide film, enhance the adhesion of oxide film/substrate and improve the oxide film anti-flaking, so that vastly slows down the oxidation rate at 1 000 ℃, which effectively improve the high temperature oxidation resistance of the alloy. But excessive content can make its antioxidant properties fall rapidly.关键词
ODS镍基高温合金/Y2O3含量/高温氧化/氧化动力学/氧化膜/氧化机理Key words
ODS nickel-based superalloy/ Y2O3 content/ high temperature oxidation/ oxidation kinetics/ oxide film/ oxidation mechanism分类
矿业与冶金引用本文复制引用
熊惟皓,李俊,李小峰..轻质化MA/ODS镍基高温合金高温氧化行为[J].华中科技大学学报（自然科学版）,2011,39(6):106-110,115,6.基金项目
高等学校博士学科点专项科研基金资助项目(20080480032) （20080480032）
国家自然科学基金重点资助项目 (50634060). （50634060）
