Improvement of fracture toughness of ZrB2-SiC composites with carbon interfaces

被引：22

作者：

Guo, Wei-Ming ^{[1
]}

You, Yang ^{[1
]}

Zhang, Guo-Jun ^{[2
]}

Wu, Shang-Hua ^{[1
]}

Lin, Hua-Tay ^{[1
]}

机构：

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

[2] Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 06期

基金：

中国国家自然科学基金;

关键词：

ZrB2-SiC composites; Carbon spheres; Microstructure; Fracture toughness; Weak interfaces; ZRB2-BASED CERAMICS; MECHANICAL-PROPERTIES; ZIRCONIUM DIBORIDE; HIGH-STRENGTH; MICROSTRUCTURE; DENSIFICATION; ADDITIONS;

D O I：

10.1016/j.jeurceramsoc.2014.12.026

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：

Toughened ZrB2-SiC composites have been prepared by an introduction of amorphous carbon spheres. After hot pressing, microstructure observation showed that the carbon phases were present in the form of thin layer at grain boundaries, or in the form of agglomerates at the multigrain junctions. The carbon spheres led to significant improvement of fracture toughness from 4.96 +/- 0.46 MPa m(1/2) to 7.52 +/- 0.19 MPa m(1/2). The toughening mechanism was attributed to the weak interfaces, which occurred due to the presence of carbon layer formed at grain boundaries after sintering.(C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：1985 / 1989

页数：5

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