Oxidation resistant Ti-Al-Cr alloy for protective coating applications

被引：54
作者：
Fox-Rabinovich, GS
Wilkinson, DS
Veldhuis, SC
Dosbaeva, GK
Weatherly, GC
机构：
[1] McMaster Univ, Dept Mech Engn, Hamilton, ON L8S 4L7, Canada
[2] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, Canada
来源：
INTERMETALLICS | 2006年 / 14卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
titanium aluminides; oxidation; alloy designs; coatings; intermetallics; aero-engine components;
D O I：
10.1016/j.intermet.2005.05.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ternary Ti-Al-Cr alloys offer excellent oxidation stability at elevated temperatures due to the formation of a continuous alumina surface layer during oxidation in air. We have investigated the oxidation kinetics and surface oxide characteristics of several Ti-Al-Cr compositions. It is shown that alloys containing mainly the tau and Laves phase exhibit superior oxidation stability over a wide range of temperatures (750-1100 degrees C). The best oxidation stability is exhibited by the (Ti0.25Al0.55Cr0.2) alloy containing near 70-75 at. % of tau and 25-30% Laves phases. Further improvement of this alloy's oxidation stability results from synergistic doping by a small amount (01-0.2% atomic) of active metals such as Hf and Y as well as Si (above 1%). (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：189 / 197
页数：9
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