Characterization of Ti-based solid solution cermets prepared by mechanically induced self-sustained reaction and subsequent pressureless sintering

被引：19
作者：
Chen, Xiao [1 ]
Xiong, Weihao [1 ]
Yao, Zhenhua [1 ]
Zhang, Guopeng [1 ]
Chen, Shan [1 ,2 ]
Yang, Qingqing [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die Mould Technol, Wuhan 430074, Peoples R China
[2] Naval Engn Univ, Sch Sci, Wuhan 430033, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 583卷
关键词：
Mechanochemical; Solid solution; Cermets; Toughness; NANOCOMPOSITE POWDER; ULTRAFINE (TI; MICROSTRUCTURE; TITANIUM; MO;
D O I：
10.1016/j.jallcom.2013.08.120
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nanocrystalline (Ti, Mo)C and (Ti, W) C solid solution powders were obtained by mechanically induced self-sustained reaction through high-energy ball milling of Ti, Mo, W and graphite powders under an argon atmosphere. The synthesis process of the solid solution powders and the microstructure of the solid solution cermets were investigated. The solid solution powders formed between 2 h and 3 h of ball milling. After 8 h of milling, Mo dissolved in TiC completely but W did not. (Ti, Mo) C-Ni cermets had a weak core-rim structure, and (Ti, Mo) C solid solution grains showed a poor wettability with the binder. (Ti, W) C-Ni cermets contained some grains without a core-rim structure and showed a superior toughness. The addition of Mo improved hardness and transverse rupture strength of the solid solution cermets but reduced the toughness, and the solid solution cermets showed greater toughness than conventional cermets. (C) 2013 Elsevier B. V. All rights reserved.
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收藏
页码：523 / 529
页数：7
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