Zirconia-toughened WC with/without VC and Cr3C2

被引：31

作者：

Zheng, Donghai ^{[1
]}

Li, Xiaoqiang ^{[1
]}

Li, Yuanyuan ^{[1
]}

Qu, Shengguan ^{[1
]}

Yang, Chao ^{[1
]}

机构：

[1] S China Univ Technol, Natl Met Mat Netshape Forming Engn Res Ctr, Guangzhou 510640, Guangdong, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 01期

关键词：

Tungsten carbide; Zirconia; Toughening; Microstructure; Grain-growth inhibitor; GRAIN-GROWTH; MECHANICAL-PROPERTIES; CEMENTED CARBIDES; BINDERLESS WC; SIZE; NANOCOMPOSITES; CONSOLIDATION; COMPOSITES; TOUGHNESS; VC/CR3C2;

D O I：

10.1016/j.ceramint.2013.07.111

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of Cr3C2 and VC on densification behavior, grain growth and mechanical properties of the WC-8 wt% ZrO2 composites were investigated, and the relationship between the mechanical properties and microstructure was studied. The addition of VC and Cr3C2 not only retarded densification of the WC-ZrO2 material, but also significantly suppressed the growth of WC-grains and ZrO2-particles. For the WC-ZrO2 composite without VC and Cr3C2, microstructure coarsening at elevated temperatures caused degradation in hardness, whereas the hardness maintained a high value of similar to 22 GPa for the composite with VC and Cr3C2 additives as the microstructure remained fine. The fracture toughness of the WC-based materials toughened by 8 wt% ZrO2 seemed insensitive to the coarseness of microstructure, and achieved a value of similar to 11 MPa m(1/2) when VC and Cr3C2 were added. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2011 / 2016

页数：6

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