Manufacturing a TiAl alloy by high-energy ball milling and subsequent reactive sintering

稀有金属（英文版）, 2006, 25(1): 21-26.

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1.College of Mechanical Engineering, South China University of Technology, Guangzhou 510640, China

2.College of Mechanical Engineering, South China University of Technology, Guangzhou 510640, China

3.College of Mechanical Engineering, South China University of Technology, Guangzhou 510640, China

4.College of Materials Science & Engineering, Harbin Institute of Technology, Harbin 150001, China

5.College of Materials Science & Engineering, Harbin Institute of Technology, Harbin 150001, China

基金项目: 中国科学院资助项目(59875015) the Natural Science Foundation of South China University of Technology(E5305293)

Manufacturing a TiAl alloy by high-energy ball milling and subsequent reactive sintering

Keywords： TiAl alloy

A TiAl alloy was fabricated by high-energy ball milling and subsequent reactive sintering from the mixed powders of Ti and Al. High-energy ball milling produced a kind of particular composite powders with an extremely fine altemative Ti and Al lamella structure. The composite powders not only possessed good consolidation and densification characteristics, but also resulted in the augment of nucleation rate of α and γ titanium aluminides during solid-phase reactive sintering.After a series of processing, pressing, degassing, extrusion, and sintering, the resultant TiAl alloy presented high relative density and refined grain sizes of (α2 + γ) lamella and γ phases. The compressive yield strength of the sintered TiAl reached 600 MPa at 800℃.

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Manufacturing a TiAl alloy by high-energy ball milling and subsequent reactive sintering

参考文献