A study of aluminum cladding on Ti50Al50 intermetallics by liquid aluminizing

被引：21

作者：

Hsu, IC ^{[1
]}

Wu, SK ^{[1
]}

Lin, RY ^{[1
]}

机构：

[1] UNIV CINCINNATI,DEPT MAT SCI & ENGN,CINCINNATI,OH 45221

来源：

MATERIALS CHEMISTRY AND PHYSICS | 1997年 / 49卷 / 02期

关键词：

Ti50Al50; intermetallics; aluminum cladding; preferred orientation of TiAl3 layer; oxidation resistance improvement;

D O I：

10.1016/S0254-0584(97)01892-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti50Al50 intermetallics are successfully aluminized at 750 degrees C by aluminum cladding. A multiple layer morphology of the aluminized coating is formed and the reaction layers are identified to be TiAl3 and TiAl2. During the aluminizing process, a preferred orientation along the c axis of DO22 lattice is found in the TiAl3 layer and its intensity increases with increasing reaction time. A mechanism is proposed to explain this phenomenon. The TiAl2 layer is formed by the reaction of the TiAl-TiAl3 diffusion couple. High temperature oxidation tests reveal that the aluminized specimen shows a markedly improved oxidation resistance because of the change in the oxidation kinetics from a linear relationship to a parabolic one.

引用

页码：184 / 190

页数：7

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