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

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2015年 / 123卷 / 1443期

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

页码：1051 / 1054

页数：4

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