摘要
对新型高温合金（３ＹＣ５２）的抗氧化机理进行了系统研究。结果表明，研制合金（３ＹＣ５２）具有的优异抗氧化性能在于高温下合金表面能形成致密保护层。扫描电镜（ＳＥＭ）、电子探针显微分析（ＥＰＭＡ）和Ｘ射线衍射分析（ＸＲＤ）分析表明，１１００℃，合金氧化层的内层为Ｃｒ２Ｏ３，外层为Ａｌ２Ｏ３；１３００℃，合金氧化层为单一的Ａｌ２Ｏ３。差热分析（ＤＴＡ）研究表明（Ａｌ，Ｃｒ）２Ｏ３和α－Ａｌ２Ｏ３的形成分别在１０６０℃和１３５６℃达到最大值。当温度大于１１５０℃时，Ｃｒ２Ｏ３易剥落，因此随着时间的延长，最终留下致密的α－Ａｌ２Ｏ３保护层。
The oxidation resistance mechanism of the new type superalloy (3YC52) was investigated. The results showed that the excellent oxidation resistance of it lay in the formation of a dense protective oxide layer at high temperatures. SEM, EPMA and XRD demonstrated that the inner oxide layer was Cr 2O 3 and the outer layer was Al 2O 3 at 1100℃, but it was only Al 2O 3 at 1300℃. DTA study revealed that the formation of (Al,Cr) 2O 3 and α Al 2O 3 reached the maximun at 1060℃ and 1350℃ respectively. Cr 2O 3 layer was easy to peel off and only the dense α Al 2O 3 layer remained when the temperature was higher than 1150℃.
出处
《功能材料》
EI
CAS
CSCD
北大核心
1997年第5期529-532,共4页
Journal of Functional Materials
基金
机械工业部发展基金
关键词
高温合金
抗氧化机理
镍铁铬铝基
抗氧化合金
superalloy, oxidation resistance mechanism, oxidation resistant alloy
