γ-TiAl基自生复相材料的显微组织特征

李建国; 张富祥; 王立军; 张永刚

γ-TiAl基自生复相材料的显微组织特征

北京航空航天大学材料科学与工程系

基金项目: 航空高等院校自选课题基金项目

详细信息

作者简介:
李建国(1962-),男,江苏南通人,讲师,100083,北京.

中图分类号: TG 113.12
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- 文章访问数: 2774
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- PDF下载量: 8
- 被引次数: 0
出版历程
- 收稿日期: 1999-05-19
- 网络出版日期: 2000-05-31

Microstructures of Multi-phase Materials In-situ Formed in γ-TiAl　Based Alloys

Beijing University of Aeronautics and Astronautics, Dept. of Materials Science and Engineering

摘要

摘要: 研究了添加硼、硅、碳的 γ-TiAl基自生复相材料的显微组织特征.在压力4 GPa、温度1 273 K、反应合成时间60 min的条件下,通过粉末间的原位置换放热反应制备了样品.研究发现:Ti-Al-B三元合金含有TiAl相、Ti₃Al相和TiB₂相;Ti-Al-Si三元合金含有TiAl相、Ti₃Al相和Ti₅(Al,Si)₃相;Ti-Al-C三元合金含有TiAl相和Ti₃AlC相;Ti-Al-B-Si四元合金含有TiAl相、Ti₃Al相、TiB₂相和Ti₅(Al,Si)₃相;Ti-Al-B-C四元合金含有TiAl相、Ti₃AlC相和TiB₂相;Ti-Al-B-Si-C五元合金含有TiAl相、Ti₃AlC相、TiB₂相和Ti₅(Al,Si)₃相,其组织非常相似于预先设计的组织.在此基础上就不同相对性能的影响进行了分析.
- 原位 /
- 复合材料 /
- 显微组织 /
- γ-TiAl基合金
Abstract: The phases and microstructures in-situ formed by solid-state reaction were studied after the elements of B, C and Si were single and mixed doped to the TiAl-based alloys. The results showed that, in the Ti-Al-B alloys, the phases of TiAl, Ti₃Al, and TiB₂ were formed; in the Ti-Al-Si alloys, the phases ofTiAl, Ti₃Al and Ti₅(Al, Si)₃ were formed; in the Ti-Al-C alloys, the phases of TiAl and Ti₃AlC were formed; in the Ti-Al-B-Si alloys, the phases of TiAl, Ti₃Al, TiB₂ and Ti₅(Al, Si)₃ were formed; in the Ti-Al-B-C alloys, the phases of TiAl, TiB₂ and Ti₃AlC were formed; Finally, in the Ti-Al-B-C-Si alloys, besides the TiAl phases, the phases of partice TiB₂, acicular TiB₂, lath Ti₃AlC and massive Ti₅(Al,Si)₃ all appeared, and this microstructure was approximately the same as pre-designed, therefore an optimized property is expected.
- in-situ /
- composite materials /
- micro structure /
- γ-TiAl based alloys

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参考文献(1)

[1]Moore J J, Readey D W, Feng H J, et al. The combustion synthesis of advanced materials[J]. JOM, 1994, 11:72~78. [2]VanMeter M L, Kampe S L,Christodoulou L. Mechanical properties of near-γ titanium aluminides reinforced with high volume percentages of TiB₂[J]. Scripta Materialia, 1996, 34(8):1251~1256. [3]Hyman M E, Mecullough C, Levi C G,et al. Evolution of boride morphologies in TiAl-B alloys[J]. Met Trans A, 1991, 22A:1647~1662. [4]Johnson D R, Inui H, Yamaguchi M. Directional solidification and microstructural control of the TiAl/Ti₃Al lamellar microstructure in TiAl-Si alloys[J]. Acta Mater,1996,44(6):2523~2535. [5]Chin E S C, Weerasooriya T, Woolsey P. Dynamic behavior of XD^ TiB₂ reinforced Ti-48Al. In:Kim Y W, Wagner R, Yamaguchi M, eds. Gamma Titanium Aluminides. :The Minerals, Metals and Materials Society, 1995. 425~431. [6]Tian W H, Nemoto M. Strengthening of γ-TiAl by carbide and nitride precipitation. In:Kim Y W, Wagner R, Yamaguchi M, eds. Gamma Titanium Aluminides. :The Minerals, Metalls and Materials Society, 1995. 689~696.

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