Mechanical and electrical properties of B4C-CrB2 ceramics fabricated by liquid phase sintering

被引：77
作者：
Yamada, S
Hirao, K
Yamauchi, Y
Kanzaki, S
机构：
[1] Fine Ceram Res Assoc, Synergy Ceram Lab, Nagoya, Aichi 4638687, Japan
[2] Natl Inst Adv Ind Sci & Technol, Synergy Mat Res Ctr, Nagoya, Aichi 4638687, Japan
来源：
CERAMICS INTERNATIONAL | 2003年 / 29卷 / 03期
关键词：
mechanical properties; electrical conductivity; carbide; composite ceramic;
D O I：
10.1016/S0272-8842(02)00120-7
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：
B4C based ceramic composites with additions of CrB2 up to 25 mol% were fabricated by hot pressing at 2050 degreesC with a low applied load of 5 MPa. The CrB2 addition enhanced the densification of B4C due to the formation of CrB2-B4C eutectic liquid. Both a high strength of 684 MPa and a modest fracture toughness of 3.2 Mpa m(1/2) were obtained for the B4C-22.5 mol% CrB2 specimen. Furthermore, the electrical conductivity was increased remarkably for the specimens with more than 15 mol% CrB2, which was attributed to the formation of three-dimensional network of the electrically conductive CrB2 phase. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved.
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页码：299 / 304
页数：6
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