Microstructural evolution and mechanical behavior of porous W reinforced by in-situ W2C

被引：11
|
作者：
Shen, Qiang [1 ]
Ge, Shuai [1 ]
Zhao, Aoao [1 ]
Sun, Yi [1 ]
Zhang, Jian [1 ]
Zhou, Dongqing [1 ]
Luo, Guoqiang [1 ]
Zhang, Lianmeng [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 797卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Porous tungsten; Tape-casting; NaCl; W2C; Compressive strength; TUNGSTEN; FABRICATION; SURFACE; METALS;
D O I：
10.1016/j.jallcom.2019.05.124
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：
Porous tungsten reinforced by W2C was prepared by tape casting using NaCl space holder. The results showed that stable W-NaCl tapes had been produced, a porous foam with a controllable porosity was finally formed. The large pores created by the space holder were 4 mu m, and the small pores induced by powder sintering were 1 mu m. The C atoms introduced by organic additives transform the powder sintering into reaction-sintering, and help the in-situ formation of the W2C ceramic phase, contributing to massive improvements in strength. With the increasing of sintering temperature, the porosity decreased and the compressive strength increased. The content of the NaCl was linear with porosity, but tended to vary inversely with the compressive strength. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：1106 / 1114
页数：9
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