Formation of tough interlocking microstructure in ZrB2-SiC-based ultrahigh-temperature ceramics by pressureless sintering

被引：79
作者：
Zou, Ji [1 ,2 ]
Zhang, Guo-Jun [1 ]
Kan, Yan-Mei [1 ]
机构：
[1] Acad Sinica, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH | 2009年 / 24卷 / 07期
基金：
中国国家自然科学基金;
关键词：
ZIRCONIUM DIBORIDE; MECHANICAL-PROPERTIES; BORON-CARBIDE; DENSIFICATION; COMPOSITES; ADDITIONS; HAFNIUM;
D O I：
10.1557/JMR.2009.0274
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A self-reinforced ultrahigh-temperature ceramic (UHTC) with elongated ZrB2 grains has been successfully densified by pressureless sintering using commercially available ZrB2, SiC, and WC powders as raw materials. Benefiting from the unique interlocking microstructure, this material had improved strength (518 +/- 10 MPa) and higher fracture toughness (6.5 +/- 0.2 MPa m(1/2)) compared to ZrB2-SiC ceramics prepared by pressureless sintering. This work provides a new route for tailoring the microstructure and mechanical properties of UHTCs.
引用
收藏
页码：2428 / 2434
页数：7
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