Microstructure and Mechanical Properties of B4C-TiB2-SiC Ceramics Fabricated by Spark Plasma Sintering

被引：0

作者：

Zhao P. ^{[1
]}

Wang Q. ^{[1
]}

Zhang L. ^{[1
]}

Li M. ^{[1
]}

Song Q. ^{[2
]}

Zhang Z. ^{[2
,3
]}

Yin S. ^{[2
]}

Jia Z. ^{[2
]}

机构：

[1] Navy Research Institute, Beijing

[2] School of Materials Science, Beijing Institute of Technology, Beijing

[3] State Key Laboratory of Environmental Impact Material Technology, Beijing

来源：

Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | 2022年 / 42卷 / 06期

关键词：

B[!sub]4[!/sub]C-TiB[!sub]2[!/sub]-SiC composite ceramics; Mechanical properties; Microstructure; Sintering pressure; Spark plasma sintering(SPS);

D O I：

10.15918/j.tbit1001-0645.2021.139

中图分类号：

学科分类号：

摘要：

A new preparation method of B4C-based composite ceramics was proposed to improve sintering performance and decrease preparation cost of B4C ceramics. Taking B4C, Ti3SiC2, and Si mixtures as raw powders, B4C-TiB2-SiC composite ceramics with 30 wt. % (TiB2+SiC) second phase were fabricated based on spark plasma sintering (SPS) method. Taking advantage of special sintering mechanism of SPS and in situ exothermic reaction during the sintering process, the new method was arranged to improve the sintering property and reduce the preparation cost of B4C ceramics. The results indicate that composite ceramics with high relative density (98.5%) can be obtained at 1650 ℃ and 50 MPa for 5 min. With the increasing of sintering pressure, hardness of B4C-TiB2-SiC composite ceramics gradually increases, fracture toughness decreases, while flexural strength shows a trend of rise slowly at first and then rise rapidly. Copyright ©2022 Transaction of Beijing Institute of Technology. All rights reserved.

引用

页码：658 / 664

页数：6

共 24 条

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