摘要
通过实际浇注制取了Ti-48Al-2Cr-2Nb(at%,下同)合金熔体/氧化物铸型界面,继而借助SEM、EPMA和XRD等分析测试手段,对Ti-48Al-2Cr-2Nb合金与氧化物铸型高温反应后的界面组织形貌、元素的分布以及界面生成相的相组成进行了研究,并探讨了Ti-48Al-2Cr-2Nb合金熔体与氧化物铸型间的界面反应机理。结果表明,Ti-48Al-2Cr-2Nb合金熔体与氧化物铸型间发生了一定程度的界面化学反应,但在界面上化学反应并不是均匀进行的,而是在Ti-48Al-2Cr-2Nb金熔体与氧化物铸型紧密结合的区域优先进行。
The interface between Ti-48Al-2Cr-2Nb （at%） alloy melt and its oxide mould has been prepared by means of the investment casting. The microstructure, element distributions and phase composition of Ti-48Al-2Cr-2Nb （at%） alloy/oxide mould interracial reaction layer are thoroughly studied at high temperature by using SEM, EPMA and XRD analysis. The interaction mechanism between Ti-48Al-2Cr-2Nb （at%） alloy and its oxide mould is investigated. The results show that chemical reaction occurs in a certain extent on the interface between Ti-48Al-2Cr-2Nb （at%） alloy melt and its oxide mould, but it is not even on the whole interface. The interracial reaction occurs preferably in the tight contact areas of Ti-48Al-2Cr-2Nb （at%） alloy and its oxide mould.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期1975-1978,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金重点项目(50434030)
关键词
TIAL基合金
界面反应
熔模铸造
TiAl base alloy
interracial reaction
investment casting
