Oxygen uptake and depletion layer formation during oxidation of gamma-TiAl based alloys

被引：60

作者：

Shemet, V ^{[1
]}

Hoven, H ^{[1
]}

Quadakkers, WJ ^{[1
]}

机构：

[1] RES CTR JULICH, INST MAT ENERGY SYST, D-52425 JULICH, GERMANY

来源：

INTERMETALLICS | 1997年 / 5卷 / 04期

关键词：

titanium aluminides; based on TiAl; oxidation;

D O I：

10.1016/S0966-9795(96)00093-3

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：

The oxidation behaviour of gamma-TiAl based intermetallics has been investigated at 900 degrees C in an oxygen-argon mixture. During oxidation a depleted layer is formed at the scale/alloy interface. This depleted layer can be single- or two-phase. Using X-ray diffraction, electron probe microanalyses and optical microscopy studies the two Ti-Al-O phases which can form in the depletion layer were identified as Z-phase (Ti5Al3O2) and an interstitial solid solution of alpha(2)-Ti3Al(O). Apart from this depletion layer, a further oxidation affected zone was found beneath the oxide scale. This zone is much wider than the depleted layer and is believed to be formed by Al-depletion and oxygen uptake in the gamma-TiAl grains. The width of the zone depends on alloy composition and microstructure. (C) 1997 Elsevier Science Ltd.

引用

页码：311 / 320

页数：10

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