THERMODYNAMIC ASPECTS OF TIAL AND TISI2 OXIDATION - THE AL-TI-O AND SI-TI-O PHASE-DIAGRAMS

被引：260

作者：

RAHMEL, A ^{[1
]}

SPENCER, PJ ^{[1
]}

机构：

[1] RHEIN WESTFAL TH AACHEN,LEHRSTUHL THEORET HUTTENKUNDE & MET KERNBRENNSTOFFE,W-5100 AACHEN,GERMANY

来源：

OXIDATION OF METALS | 1991年 / 35卷 / 1-2期

关键词：

METAL ACTIVITY VARIATION; TI-AL SYSTEM; TI-SI SYSTEM; TI-AL-O PHASE DIAGRAM; TI-SI-O PHASE DIAGRAM;

D O I：

10.1007/BF00666500

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Thermodynamic data from the literature were used to calculate the activity variations of Ti and Al in the Ti-Al system at 700, 900, and 1100-degrees-C and of Ti and Si in the Ti-Si system at 800, 1000, and 1300-degrees-C. The activity data were then applied to estimate the stable oxide phase in equilibrium with the metal phase, assuming that the activity of the oxide phase was unity. It was found that in the Ti-Al-O system the stable oxide changed from TiO to Al2O3 in the existence region of the TiAl phase, while in the Ti-Si-O system a comparable change from Ti-oxide to SiO2 occurred in the existence region of the Ti5Si3 phase. The significance of these results to the oxidation of intermetallics in the Ti-Al and Ti-Si systems is discussed briefly.

引用

页码：53 / 68

页数：16

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