摘要
简要介绍了ＴｉＡｌ基合金的应用及目前存在的主要问题。阐述了在ＴｉＡｌ基合金上不易形成连续的Ａｌ２Ｏ３膜的“氮效应”，指出“氮效应”似乎是阻碍ＴｉＡｌ合金在空气中形成连续的Ａｌ２Ｏ３膜的主要障碍。讨论了改善ＴｉＡｌ基合金抗氧化性的途径，即控制较低的Ａｌ含量，添加适量的Ｗ，Ｍｏ，Ｎｂ和Ｓｉ等合金元素，采用Ｔｉ－Ａｌ－Ｃｒ合金涂层等。
The applications and existential main problems of the γ TiAl based alloys are briefly introduced. The “nitrogening effect”is a main reason for not easily forming continuous Al 2O 3 scale on the surface of the TiAl based alloys. Some methods to improve the oxidation resistance of these alloys, such as controlling the aluminium contents in the alloys, adding certain amounts of W, Mo, Nb and/or Si, or adopting Ti Al Cr coating, are discussed.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1999年第2期93-96,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金
国家"863"高技术基金
关键词
TIAL基合金
抗氧化性
氮效应
涂层
添加剂
TiAl based alloy, oxidation resistance, nitrogening effect, alloying addition
