Effects of ZrB2 powders on microstructure and mechanical properties of ZrB2-SiCw ceramics

被引：2

作者：

Xu, Liang ^{[1
]}

Liu, Qiu-Yu ^{[1
]}

Zhou, Yu-Zhang ^{[1
]}

Guo, Wei-Ming ^{[1
]}

Zhang, Yan ^{[1
]}

You, Yang ^{[2
]}

Lin, Hua-Tay ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Peoples R China

[2] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 20期

基金：

中国国家自然科学基金;

关键词：

ZrB2; powders; ZrB2-based composites; SiC whiskers; Microstructure; Mechanical properties; TEMPERATURE; ZIRCONIUM; DENSIFICATION; REDUCTION; STRENGTH;

D O I：

10.1016/j.ceramint.2022.06.275

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 effects of three kinds of ZrB2 powders with different particle size and oxygen content on microstructure and mechanical properties of ZrB2-based ceramics reinforced by SiC whisker (SiCw) are studied. Although the particle size of ZrB2 powders was smallest, high oxygen content led to the severer degeneration of SiCw and the coarsened microstructure of ZrB2-SiCw composite, which resulted in the lowest fracture toughness (3.86 +/- 0.51 MPa m(1/2)). When ZrB2 powders with the combination of small particle size and low oxygen content were used, ZrB2-SiCw composite exhibited less degeneration of SiCw, finer microstructure, and then higher fracture toughness of 5.83 +/- 0.75 MPa m(1/)(2). Therefore, lowering the particle size and oxygen content of ZrB2 powders was an effective method to prepare ZrB2-SiCw with high fracture toughness.

引用

页码：31060 / 31064

页数：5

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