Densification behavior and mechanical properties of spark plasma reaction sintered ZrB2-ZrC-B4C ceramics from B4C-Zr system

被引：27

作者：

Chen, Huan ^{[1
]}

Zeng, Fanhao ^{[1
]}

Li, Wenjie ^{[1
]}

Liu, Ji'an ^{[1
]}

Gu, Yi ^{[2
]}

Zhang, Fuqin ^{[1
]}

机构：

[1] Cent S Univ, Natl Key Lab Sci & Technol Natl Def High Strength, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Coll Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 09期

关键词：

Spark plasma reaction sintering; ZrB2-ZrC-B4C ceramics; Mechanical properties; ZIRCONIUM DIBORIDE; ZRB2-BASED CERAMICS; MICROSTRUCTURE; COMPOSITES; ZRB2; SIZE;

D O I：

10.1016/j.ceramint.2019.03.112

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 ZrB2-ZrC-B4C multiphase ceramics were produced by spark plasma reaction sintering (SPAS) from boron carbide (B4C) with different volume of zirconium (Zr). With Zr content increases, the B4C phases in the composite decreased gradually, and the zirconium carbide (ZrC) phase gradually increased. With Zr content increased to 70 vol%, the morphology of the zirconium diboride (ZrB2) changed from equiaxed crystal to platelet crystal. During the solid reaction process of Zr with B4C, carbon (C) was preferentially replaced to generate ZrB2, and then the remaining Zr reacted with C to form ZrC. With the increase of Zr content, the flexure strength and fracture toughness of the ZrB2-ZrC-B4C composite ceramics increased due to improved microstructure and more crack deflection and intergranular fracture.

引用

页码：12122 / 12129

页数：8

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