Effect of short carbon fibre concentration on microstructure and mechanical properties of TiCN-based cermets

被引：14

作者：

Sun, W. C. ^{[1
]}

Zhang, P. ^{[1
]}

Li, P. ^{[1
]}

She, X. L. ^{[1
]}

Zhang, Y. J. ^{[1
]}

Chen, X. G. ^{[1
]}

机构：

[1] Xian Univ Sci & Technol, Coll Mat Sci & Engn, 58 Yanta Middle Rd, Xian 710054, Shaanxi, Peoples R China

来源：

ADVANCES IN APPLIED CERAMICS | 2016年 / 115卷 / 04期

基金：

中国国家自然科学基金;

关键词：

TiCN-based cermets; Carbon fibre (C-f); Toughening and strengthening; Microstructure; Mechanical properties; TI(C; N)-BASED CERMETS; POWDER; BEHAVIOR; (TI; N);

D O I：

10.1080/17436753.2015.1120403

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：

Short carbon fibre (C-f) reinforced TiCN-based cermets (C-f/TiCN composites) were produced by powder metallurgy method with pressureless sintering technology. The phase evolution, microstructure and fracture morphology of C-f/TiCN composites were investigated. The results showed that TiC, TiN, WC, Cr3C2 and Mo phases disappeared gradually and diffused into core and rim phases by dissolution-reprecipitation process, finally formed new hard TiCN core phases and complex compound (Cr, W, Mo, Ti)(CN) rim phases, with the sintering temperature increasing. The added C-f did not change the core-rim' microstructure but improved the mechanical properties of TiCN-based cermets. The C-f/TiCN composite containing 3wt-% C-f achieved the best comprehensive mechanical properties, with fracture toughness and bending strength increasing by about 14.4% and 30.8%, respectively, when compared with the composite without C-f. Toughening and strengthening mechanisms of C-f/TiCN composite were concluded as crack deflection and branch, as well as the pull-out, fracture and bridging of carbon fibres.

引用

页码：216 / 223

页数：8

共 46 条

[1] Influence of heat treatment on the high temperature oxidation mechanisms of an Fe-TiCN cermet [J].