Elevated-temperature oxidation behavior of titanium silicide and titanium silicide based alloy and composite

被引：63
作者：
Mitra, R [1 ]
Rao, VVR [1 ]
机构：
[1] Def Met Res Lab, Composites Grp, Hyderabad 500058, Andhra Pradesh, India
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1998年 / 29卷 / 06期
关键词：
D O I：
10.1007/s11661-998-0089-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior of Ti5Si3 has been studied in air in the temperature range of 1200-degrees-C to 1400-degrees-C. The oxidation kinetics is slower than that predicted by the parabolic-rate law equation at 1200-degrees-C, but is sharply enhanced beyond a temperature of 1300-degrees-C. The oxidation kinetics of a Ti5Si3-8 wt pct Al alloy and a Ti5Si3-20 vol pct TiC composite at 1200-degrees-C has also been investigated and compared to that of Ti5Si3. Alloying with Al does not alter the oxidation resistance much, but the presence of TiC reinforcements enhances the rate of oxidation significantly. The oxidation products have been identified and the mechanism of oxidation has been analyzed using thermodynamic and kinetic considerations.
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页码：1665 / 1675
页数：11
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