Microstructure and Mechanical Properties of Hot Pressed ZrC-SiC-ZrB2 Composites

被引：3

作者：

Ma, Baoxia ^{[1
]}

Han, Wenbo ^{[1
]}

Zhang, Xinghong ^{[1
]}

机构：

[1] Harbin Inst Technol, Ctr Composite Mat, Harbin 150001, Peoples R China

来源：

HIGH-PERFORMANCE CERAMICS VI | 2010年 / 434-435卷

关键词：

ZrC; Ceramic; Microstructure; Mechanical properties; HIGH-TEMPERATURE CERAMICS; DIBORIDE-BASED COMPOSITES; ZRB2-ZRC-SIC COMPOSITES; SILICON-CARBIDE; ZIRCONIUM; OXIDATION; FABRICATION; BEHAVIOR; SIZE; SHS;

D O I：

10.4028/www.scientific.net/KEM.434-435.173

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：

Ternary ZrC-SiC-ZrB(2) ceramic composites were prepared by hot pressing at 1900 degrees C for 60 min under a pressure of 30 MPa in argon. The influence of ZrB(2) content on the microstructure and mechanical properties of ZrC-SiC-ZrB(2) composites was investigated. Examination of SEM showed that the microstructure of the composites consisted of the equiaxed ZrB(2), ZrC and SiC grains, and there was a slight tendency of reduction for grain size in ZrC with increasing ZrB(2) content. The hardness increased considerably from 23.3 GPa for the ZS material to 26.4 GPa for the ZS20B material. Flexural strength was a strong function of ZrB(2) content, increasing from 407 MPa without ZrB(2) addition to 627 MPa when the ZrB(2) content was 20vol.%. However, the addition of ZrB(2) has little influence on the fracture toughness, ranging between 5.5 and 5.7 MPam(1/2).

引用

页码：173 / 177

页数：5

共 24 条

[1] Hard, tough and strong ZrO2-WC composites from nanosized powders [J].

Anné, G ;

Put, S ;

Vanmeensel, K ;

Jiang, DT ;

Vleugels, J ;

Van der Biest, O .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2005, 25 (01) :55-63

[2] INFLUENCE OF POLYCRYSTAL GRAIN SIZE ON SEVERAL MECHANICAL PROPERTIES OF MATERIALS [J].

ARMSTRONG, RW .

METALLURGICAL TRANSACTIONS, 1970, 1 (05) :1169-+

[3]

Bull J., 1998, U.S. patent, Patent No. 5750450

[4] 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

[5] Mechanical and physical behavior of spark plasma sintered ZrC-ZrB2-SiC composites [J].

Guo, Shu-Qi ;

Kagawa, Yutaka ;

Nishimura, Toshiyuki ;

Chung, Dowhan ;

Yang, Jenn-Ming .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2008, 28 (06) :1279-1285

[6] Pressureless sintering and physical properties of ZrB2-based composites with ZrSi2 additive [J].

Guo, Shu-Qi ;

Kagawa, Yutaka ;

Nishimura, Toshiyuki ;

Tanaka, Hidehiko .

SCRIPTA MATERIALIA, 2008, 58 (07) :579-582

[7] Elastic properties of spark plasma sintered (SPSed) ZrB2-ZrC-SiC composites [J].

Guo, Shuqi ;

Kagawa, Yutaka ;

Nishimura, Toshiyuki ;

Tanaka, Hidehiko .

CERAMICS INTERNATIONAL, 2008, 34 (08) :1811-1817

[8] Improved processing, and oxidation-resistance of ZrB2 ultra-high temperature ceramics containing SiC nanodispersoids [J].

Hwang, Sung S. ;

Vasiliev, Alexander L. ;

Padture, Nitin P. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 464 (1-2) :216-224

[9] Combination of SHS and SPS Techniques for fabrication of fully dense ZrB2-ZrC-SiC composites [J].

Licheri, Roberta ;

Orru, Roberto ;

Musa, Clara ;

Cao, Giacomo .

MATERIALS LETTERS, 2008, 62 (03) :432-435

[10] SINTERING AND MECHANICAL-PROPERTIES OF ZRC-ZRO2 COMPOSITES [J].

MINHAGA, E ;

SCOTT, WD .

JOURNAL OF MATERIALS SCIENCE, 1988, 23 (08) :2865-2870

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