期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 48, 期 -, 页码 418-426出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2014.10.014
关键词
Niobium carbide; Sintering; Grain growth; Microstructure; Mechanical properties
资金
- Hercules Foundation [ZW09-09]
- Companhia Brasileira de Metallurgia e Mineracao (CBMM), Sao Paulo, Brazil [KUL-SERV-2014/1911]
NbC has a relatively high hardness (19.6 GPa) and melting temperature (3600 degrees C) and is usually applied as a grain growth inhibitor in WC-Co hardmetals. The current study reports on the influence of the sintering technology and overall chemical composition on the microstructure and mechanical properties of NbC-based hardmetals, using Co as a binder. The partial replacement of NbC by 5 wt.% WC, MO2C, VC or TiC allows one to significantly improve the hardness and toughness of the NbC-Co materials. The influence of different binders, i.e., Co, 316L stainless steel and Fe3Al on the microstructure and mechanical properties of NbC-based hardmetals was also investigated. The powder mixtures were sintered in the solid state by PECS and liquid state by conventional vacuum sintering. Detailed microstructural analysis was conducted by EPMA elemental mapping and WDS point analysis. Mechanical properties, including Vickers hardness and indentation toughness were assessed. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据