北京航空航天大学学报 ›› 2000, Vol. 26 ›› Issue (5): 501-504.

• 论文 • 上一篇    下一篇

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   

  1. 北京航空航天大学 材料科学与工程系
  • 收稿日期:1999-05-19 出版日期:2000-05-31 发布日期:2010-09-27
  • 作者简介:李建国(1962-),男,江苏南通人,讲师,100083,北京.
  • 基金资助:

    航空高等院校自选课题基金项目

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

LI Jian-guo, ZHANG Fu-xiang, WANG Li-jun, ZHANG Yong-gang   

  1. Beijing University of Aeronautics and Astronautics, Dept. of Materials Science and Engineering
  • Received:1999-05-19 Online:2000-05-31 Published:2010-09-27

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.

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.

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