Coatings of Nb-based Alloy by Cr and/or Al Pack Cementations and Its Oxidation Behavior in Air at 1273-1473 K
Coatings of Nb-based Alloy by Cr and/or Al Pack Cementations and Its Oxidation Behavior in Air at 1273-1473 K
复制标题
DOI：
10.2320/matertrans.44.731
复制
发表时间：
2003-04
影响因子：
1.2
通讯作者：
M. Fukumoto;Y. Matsumura;S. Hayashi;T. Narita;Kazusi Sakamoto;A. Kasama;R. Tanaka
中科院分区：
文献类型：
--
作者：
M. Fukumoto;Y. Matsumura;S. Hayashi;T. Narita;Kazusi Sakamoto;A. Kasama;R. Tanaka
对Nb-5 Mo-15 W合金（质量分数%）进行了Cr和/或Al包埋渗处理，研究了渗层合金在1473 K、32.4ks空气中的氧化行为。Al填充的合金形成了外层为NbAl 2、内层为Nb 3Al的涂层，抗氧化性能较差。Cr填充合金形成了外层为β-Cr，中间为Cr2 Nb的涂层，在1373 K以下具有良好的抗氧化性能。先填充Cr再填充Al的合金形成了最外层为β-Cr（Al）、外层为β-Cr（Nb）、中间为Cr2 Nb的涂层，涂层合金在1473 K以下具有良好的抗氧化性能，形成了Al 2 O3氧化膜。（2003年1月29日接收; 2003年2月24日接受）
An Nb–5Mo–15W alloy (mass%) was surface-treated in vacuum by Cr and/or Al pack cementations, and the oxidation behavior of the coatedalloys was investigatedin air at temperatures up to 1473 K for 32.4 ks. The Al packedalloy formeda coating layer with the outer NbAl 2 andthe inner Nb 3Al, andshowedpoor oxidation resistance. The Cr packedalloy formeda coating with outer � -Cr andinner Cr 2Nb layer, and showedgoodoxidation resistance up to 1373 K. The alloy packedwith Cr andthen Al formeda coating layer with outermost � -Cr(Al), outer � Cr(Nb), andinner Cr 2Nb layers, andthis coatedalloy showedgoodoxidation resistance up to 1473 K by forming an Al 2O3 scale. (ReceivedJanuary 29, 2003; AcceptedFebruary 24, 2003)