Microstructure and compression properties of in situ dual phase nanosized (TiB2-Ti5Si3)/TiAl matrix composites fabricated by combustion synthesis and hot press consolidation

被引：8
|
作者：
Qiu, F. [1 ]
He, Y. [1 ]
Zhu, L. [1 ]
Shu, S. L. [2 ]
Hu, W. [1 ]
Zhan, C. H. [1 ]
Jiang, Q. C. [1 ]
机构：
[1] Jilin Univ, Dept Mat Sci & Engn, Key Lab Automobile Mat, Minist Educ, Changchun 130025, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130012, Peoples R China
来源：
POWDER METALLURGY | 2015年 / 58卷 / 03期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Dual phase; Nanoparticles; In situ; TiAl matrix composites; MECHANICAL-PROPERTIES; OXIDATION BEHAVIOR; TIAL ALLOYS; TIB2; FE; PARTICLES; AIR;
D O I：
10.1179/1743290115Y.0000000010
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The dual phase nanosized (TiB2-Ti5Si3)/TiAl composites were successfully fabricated using in situ method of combustion synthesis and hot press consolidation. The effects of proportions of the in situ dual phase nanoparticles (TiB2 and Ti5Si3) on microstructures and compression properties of the composites were investigated. Compared with the monophase TiB2 and Ti5Si3 particles, dual phase TiB2-Ti5Si3 particles exhibit more obvious grain refinement effect. The grain size of TiAl alloy was refined from similar to 66 to similar to 12 mu m with the the generation of dual phase TiB2-Ti5Si3 particles. Moreover, the TiAl matrix composites reinforced with dual phase nanosized TiB2-Ti5Si3 particles exhibit better comprehensive compression properties. When TiB2:Ti5Si3 = 2:1[Sigma(TiB2 + Ti5Si3) = 4 vol.-%], the TiAl matrix composite has a high true fraction strain of 26.1%, a true yield strength of 761 MPa and an ultimate compression strength of 1647 MPa.
引用
收藏
页码：235 / 240
页数：6
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