Consolidation of B4C-VB2 eutectic ceramics by spark plasma sintering

被引:8
|
作者
Demirskyi, Dmytro [1 ,2 ]
Sakka, Yoshio [1 ]
Vasylkiv, Oleg [1 ,2 ]
机构
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[2] Nanyang Technol Univ, Singapore 639798, Singapore
基金
日本学术振兴会;
关键词
Spark plasma sintering; Boron carbide; Eutectic; Toughness; Hardness; FRACTURE-TOUGHNESS; COMPOSITES; HARDNESS; FABRICATION; STRENGTH;
D O I
10.2109/jcersj2.123.1051
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 in situ synthesis and consolidation of B4C-VB2 eutectic composites by spark plasma sintering (SPS) is reported. The microstructure properties were determined for composites with the B4C-VB2 eutectic composition as functions of the VB2 content and the VB2-VB2 interlamellar spacing. A change of VB2 concentration from 45 to 48 mol.% resulted in the formation of the rodlike eutectic microstructure. Indentation fracture toughness values higher than 4 MPa.m(1/2) were identified for eutectic composites with interlamellar spacings between 0.9 and 1.2 mu m. The composites obtained by SPS with a composition of 45 mol.% VB2 exhibited a lower Vickers hardness (23-24 GPa) and higher indentation fracture toughness (up to 4.5 MPa.m(1/2)) than the eutectic composites with 48 mol.% of VB2. (C) 2015 The Ceramic Society of Japan. All rights reserved.
引用
收藏
页码:1051 / 1054
页数:4
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