Protective effect of the sputtered TiAlCrAg coating on the high-temperature oxidation and hot corrosion resistance of Ti-Al-Nb alloy

被引：0
作者：
Xi, YJ [1 ]
Wang, FH
He, LL
机构：
[1] Chinese Acad Sci, Met Res Inst, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
[2] Shenyang Natl Lab MatSci, Met Res Inst, Shenyang 110016, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2004年 / 20卷 / 06期
关键词：
high temperature oxidation; TiAlCrAg coating; hot-corrosion;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of a sputtered Ti-48Al-8Cr-2Ag (at. pct) coating on the oxidation resistance of the cast Ti-46.5Al-5Nb (at. pct) alloy was investigated in air at 1000similar to1100degreesC. Hot corrosion in molten 75 wt pct Na2SO4+25 wt pct K2SO4 was investigated at 900degreesC. The scale on the cast TiAlNb tends to spall in air, while the scale on coating is very adherent. The sputtered Ti-48Al-8Cr-2Ag coating remarkably improved high temperature oxidation resistance of the cast Ti-46.5Al-Ob alloy because of the formation of an adherent Al2O3 scale. Due to the inward diffusion of Cr, Kirkendall voids were found at the coating/bstrate interface. TiAlCrAg coating provided excellent hot corrosion resistance for TiAlNb alloy in molten 75 wt pct Na2SO4+25 wt pct K2SO4 at 900degreesC due to the formation of a continuous Al2O3 scale.
引用
收藏
页码：724 / 727
页数：4
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