Microstructure and mechanical properties of Al2O3/TiAl in situ composites doped with Fe2O3

被引：2

作者：

Xiang, Liuyi ^{[1
]}

Wang, Fen ^{[1
]}

Zhu, Jianfeng ^{[1
]}

Wang, Xiaofeng ^{[1
]}

机构：

[1] Shaanxi Univ Sci & Technol, Kay Lab Auxiliary Chem & Technol Chem Ind, Minist Educ, Xian 710021, Peoples R China

来源：

ADVANCED MATERIAL SCIENCE AND TECHNOLOGY, PTS 1 AND 2 | 2011年 / 675-677卷

关键词：

Al2O3/TiAl composites; hot-pressing; Microstructure; Mechanical properties; ALLOYS;

D O I：

10.4028/www.scientific.net/MSF.675-677.597

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al2O3/TiAl in situ composites were successfully prepared by vacuum hot-pressing method with elemental powder mixtures of Ti, Al, TiO2 and Fe2O3. The effect of Fe2O3 addition on the microstructures and mechanical properties of Al2O3/TiAl composites has been investigated. The results show that the Rockwell hardness, flexural strength and fracture toughness of the composites increase with increasing Fe2O3 content. When the Fe2O3 content is 0.84 wt %, the flexural strength and the fracture toughness reach the maximum value of 624 MPa and 6.63 MPa.m(1/2), respectively. The improvement of mechanical properties is firstly associated with a more homogeneous and finer microstructure developed by addition of Fe2O3; secondly, it is related to the increase of the ratio of alpha(2)-Ti3Al/gamma- TiAl matrix phases.

引用

页码：597 / 600

页数：4

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