Microstructure and mechanical properties of cubic zirconia (8YSZ)/SiC nanocomposites

被引:36
作者
Donzel, L [1 ]
Roberts, SG [1 ]
机构
[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
关键词
mechanical properties; microstructure-final; nanocomposites; SiC; SiC-ZrO2; ZrO2;
D O I
10.1016/S0955-2219(00)00117-5
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
The mechanical properties of cubic zirconia (8YSZ)/SiC "nanocomposites" were studied. These properties were found to be strongly dependent on the microstructure and processing conditions. For nanocomposites with SiC particles mostly inside the zirconia grains the bending strength, toughness and hardness were similar to that of monolithic 8YSZ. For nanocomposites with SIC particles located mainly on the grain boundaries, an improvement of the strength and an increase of the toughness were observed. The increase in strength is strongest at room temperature and decreases with rising temperature; the strengths of all materials are identical at similar to 750 degreesC. The higher strength cannot be completely accounted for by the observed increase in toughness, implying a reduced critical flaw size in the stronger material. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2457 / 2462
页数:6
相关论文
共 18 条
[1]   A CRITICAL-EVALUATION OF INDENTATION TECHNIQUES FOR MEASURING FRACTURE-TOUGHNESS .1. DIRECT CRACK MEASUREMENTS [J].
ANSTIS, GR ;
CHANTIKUL, P ;
LAWN, BR ;
MARSHALL, DB .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (09) :533-538
[2]   Microstructure and mechanical properties of yttria stabilized zirconia silicon carbide nanocomposites [J].
Bamba, N ;
Choa, YH ;
Sekino, T ;
Niihara, K .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1998, 18 (06) :693-699
[3]   Effects of second phase dispersions on microstructure and mechanical properties in MgO/SiC nanocomposites [J].
Choa, YH ;
Nakahira, A ;
Niihara, K .
SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS, 1998, 7 (03) :249-257
[4]   SINTERING AND CHARACTERIZATION OF POLYCRYSTALLINE MONOCLINIC, TETRAGONAL, AND CUBIC ZIRCONIA [J].
CUTLER, RA ;
REYNOLDS, JR ;
JONES, A .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (08) :2173-2183
[5]  
Davidge RW, 1997, BRIT CERAM T, V96, P121
[6]   Effects of silicon carbide nano-phase on the wet erosive wear of polycrystalline alumina [J].
Davidge, RW ;
Twigg, PC ;
Riley, FL .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1996, 16 (07) :799-802
[7]   CRACK TIP SHIELDING BY MICROCRACKING IN BRITTLE SOLIDS [J].
HUTCHINSON, JW .
ACTA METALLURGICA, 1987, 35 (07) :1605-1619
[8]  
NAKAHIRA A, 1993, ANN CHIM-SCI MAT, V18, P403
[9]   PREPARATION AND PROPERTIES EVALUATION OF ZIRCONIA-BASED AL2O3 COMPOSITES AS ELECTROLYTES FOR SOLID OXIDE FUEL-CELL SYSTEMS .3. MECHANICAL AND ELECTRICAL CHARACTERIZATION [J].
NAVARRO, LM ;
RECIO, P ;
JURADO, JR ;
DURAN, P .
JOURNAL OF MATERIALS SCIENCE, 1995, 30 (08) :1949-1960
[10]  
Niihara K., 1991, Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi, V99, P974, DOI 10.2109/jcersj.99.974