Effect of boron nitride nanotubes content on mechanical properties and microstructure of Ti(C,N)-based cermets

被引：24

作者：

Liu, Hanlian ^{[1
,2
]}

Chai, Yacong ^{[1
,2
]}

Huang, Chuanzhen ^{[1
,2
]}

Liu, Huahe ^{[1
,2
]}

Wang, Jun ^{[1
,2
]}

机构：

[1] Shandong Univ, Ctr Adv Jet Engn Technol CaJET, Sch Mech Engn, Jinan 250061, Peoples R China

[2] Shandong Univ, Minist Educ, Key Lab High Efficiency & Clean Mech Manufacture, Jinan 250061, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Ti(C; N) based cermets; BNNTs; Mechanical properties; Microstructure; WALLED CARBON NANOTUBES; FABRICATION; COMPOSITES; CERAMICS;

D O I：

10.1016/j.ceramint.2014.10.101

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：

Boron nitride nanotubes (BNNTs) reinforced Ti(C,N)-based cermets were fabricated by hot-pressing, and the effect of BNNTs content on their mechanical properties and microstructure was investigated. The composite containing 0.5 wt% BNNTs showed a flexural strength of 1785 MPa. Compared with monolithic Ti(C,N)-based cermets, the Ti(C,N)/BNNTs composite exhibited a significant increase in flexural strength and a slight increase in Vickers hardness and fracture toughness. The added BNNTs could refine matrix grains significantly; however, the excessive content of BNNTs aggregated in the matrix and resulted in a decline in the mechanical properties of the composites. The strengthening and toughening mechanisms of Ti(C,N)/BNNTs composite were discussed, including crack deflection, crack branching, grain bridging and transformation of fracture mode. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2813 / 2818

页数：6

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