期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 503, 期 1, 页码 145-150出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.04.218
关键词
Ceramic-matrix composites; Microstructure; Mechanical properties; Spark plasma sintering
资金
- Program for Peking Excellent Talents in the University [20061D0503200316]
- National Defense Pre-Research Foundation of China [9140A12050209BQ0137]
The in situ toughened Ti-TiB ceramic-matrix composites containing high volume fraction of TiB were synthesized by spark plasma sintering technique under a pressure of 50 MPa, with sintering temperature ranging from 1100 degrees C to 1400 degrees C and heating rate of 150 degrees C/min, using Ti and TiB(2) powders. Results indicated that Ti-TiB composites sintered at 1400 degrees C provided the optimal combination of dense microstructure, well developed lath-shaped TiB grains, and excellent mechanical properties, including the relative density of 99.6%, bending strength of 608 MPa, and a rather high fracture toughness of 9.35 MPa m(1/2). Moreover, the micro-hardness of the composites reaches a relatively high level (18.3 GPa). (C) 2010 Elsevier B.V. All rights reserved.
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