High temperature air oxidation resistance of TiAlCr-Y coated Ti45Al8Nb between 750 degrees C - 950 degrees C

被引：10
作者：
Dudziak, Tomasz [1 ]
Datta, Prasanta [1 ]
Du, Hailiang [1 ]
Ross, Ian Mark [2 ]
机构：
[1] Northumbria Univ, Adv Mat Res Inst, Ellison Bldg, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
[2] Univ Sheffield, Dept Mat Engn, Sheffield, S Yorkshire, England
来源：
OPEN ENGINEERING | 2013年 / 3卷 / 04期
关键词：
intermetallics; metal coatings; oxidation; high temperature; ESEM; EDS;
D O I：
10.2478/s13531-013-0132-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study is concerned with air oxidation of TiAlCr-Y coated Ti45Al-8Nb (at%) alloy between 750 degrees C - 950 degrees C for 500 hours. It was shown in these tests that at 750 degrees C, 850 oC and 950 degrees C, the oxidation degradation increased with temperature: at 750 oC the oxide scale consisted of TiO2/Al2O3/Cr2O3 phases, whilst at 850 degrees C the oxide scale consisted of TiO2/Al2O3 phases with a small amount of Cr2O3, and larger number of voids. The material exposed at 950 degrees C showed a significant formation of TiO2 with a small amount of Al2O3 and high number of voids; the formation of Cr2O3 at 950 degrees C was inhibited mainly due to the formation of volatile CrO3 or CrO2(OH)(2) phase.
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收藏
页码：722 / 731
页数：10
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