Fabrication, mechanical properties and thermal shock resistance of a ZrB2-graphite ceramic

被引：50

作者：

Wang Zhi ^{[1
]}

Wu Zhanjun ^{[1
]}

Shi Guodong ^{[1
]}

机构：

[1] Dalian Univ Technol, Fac Vehicle Engn & Mech, Sch Aeronaut & Astronaut, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2011年 / 29卷 / 03期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Ceramics; Microstructure; Mechanical properties; Thermal shock resistance; HIGH TEMPERATURE CERAMICS; MATRIX COMPOSITES; FRACTURE; DIBORIDES; ZIRCONIUM; TOUGHNESS;

D O I：

10.1016/j.ijrmhm.2010.12.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A ZrB2 ceramic containing 25 vol.% graphite flake (ZrB2-graphite) ceramic was fabricated by hot-pressing at 1950 degrees C. It was shown that the fracture toughness was significantly improved due to the addition of graphite flake whereas the flexure strength and hardness were slightly reduced. The increase in fracture toughness was attributed to the presence of soft graphite flake and weaker interface bonding. The decrease in the flexural strength was due to the increase in weakening factors such as the weaker bonding within the ZrB2-graphite ceramic and lower load transfer since the lower mechanical property of the graphite flake as well as graphite flakes acted as flaws in the ZrB2-graphite ceramic. The thermal shock resistance was significantly improved and the improvement mechanism in thermal shock resistance was analyzed by Griffith fracture criterion and finite element analysis. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：351 / 355

页数：5

共 21 条

[1] Microdeformation of soft particles in metal matrix composites [J].

Balos, Sebastian ;

Sidjanin, Leposava .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2009, 209 (01) :482-487

[2] Thermal conductivity of Al2O3/SiC platelet composites [J].

Barea, R ;

Belmonte, M ;

Osendi, MI ;

Miranzo, P .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2003, 23 (11) :1773-1778

[3] High-strength zirconium diboride-based ceramics [J].

Chamberlain, AL ;

Fahrenholtz, WG ;

Hilmas, GE ;

Ellerby, DT .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2004, 87 (06) :1170-1172

[4] Microstructural feature and thermal shock behavior of hot-pressed ZrB2-SiC-ZrO2 composite [J].

Chen, Dejiang ;

Li, Weijie ;

Zhang, Xinghong ;

Hu, Ping ;

Han, Jiecai ;

Hong, Changqing ;

Han, Wenbo .

MATERIALS CHEMISTRY AND PHYSICS, 2009, 116 (2-3) :348-352

[5] Effect of sintering temperature and holding time on the microstructure and mechanical properties of ZrB2-SiCw composites [J].

Du, Shanyi ;

Xu, Lin ;

Zhang, Xinghong ;

Hu, Ping ;

Han, Wenbo .

MATERIALS CHEMISTRY AND PHYSICS, 2009, 116 (01) :76-80

[6] Refractory diborides of zirconium and hafnium [J].

Fahrenholtz, William G. ;

Hilmas, Gregory E. ;

Talmy, Inna G. ;

Zaykoski, James A. .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2007, 90 (05) :1347-1364

[7] Fracture toughness of ceramics and ceramic composites [J].

Gogotsi, GA .

CERAMICS INTERNATIONAL, 2003, 29 (07) :777-784

[8] Evaluation of ultra-high temperature ceramics for aeropropulsion use [J].

Levine, SR ;

Opila, EJ ;

Halbig, MC ;

Kiser, JD ;

Singh, M ;

Salem, JA .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2002, 22 (14-15) :2757-2767

[9] Crack-face grain interlocking/bridging of a polycrystalline graphite: The role in mixed mode fracture [J].

Li, M ;

Tsujimura, M ;

Sakai, M .

CARBON, 1999, 37 (10) :1633-1639

[10] The repeated thermal shock behaviors of a ZrB2-SiC composite heated by electric resistance method [J].

Meng, Songhe ;

Qi, Fei ;

Chen, Hongbo ;

Wang, Zhi ;

Bai, Guanghui .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2011, 29 (01) :44-48

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