期刊
MATERIALS LETTERS
卷 185, 期 -, 页码 351-354出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.09.015
关键词
Intermetallic alloys and compounds; Reactive infiltration; Microstructure; Tensile properties
资金
- National Natural Science Foundation of China [51401068]
- China Postdoctoral Science Foundation [2013M541370, 2015T80343]
- Heilongjiang Postdoctoral Fund [LBH-Z13098]
Fully dense Ti5Si3/TiAl composites were successfully in situ synthesized by reactive infiltration using Ti powders and Al Si alloys as raw materials. Fine Ti5Si3 particles exhibit a unique quasi-network distribution, remarkably hindering the coarsening of alpha 2/gamma lamellar colonies. Compared to the as-cast samples, the mean size of lamellar colonies is much finer and thus the resulting Ti5Si3/TiAl composites show the enhanced room temperature elongation, up to 2.5%, while retaining the ultimate tensile strength of 414 MPa. Moreover, Ti5Si3/TiAl composites display superior high temperature tensile properties. Consequently, the novel Ti5Si3/TiAl composites have potential for high temperature applications in aeronautics and aerospace. (C) 2016 Elsevier B.V. All rights reserved.
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