PHASE-EQUILIBRIA OF ZIRCONIA-DISPERSED CERAMIC IN NIO-AL2O3-ZRO2 SYSTEM

被引：17
作者：
CHANG, WS
CHEN, S
SHEN, P
机构：
[1] Institute of Materials Science and Engineering, National Sun Yat-Sen University, Kaohsiung
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 145卷 / 01期
关键词：
D O I：
10.1016/0921-5093(91)90301-3
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Powders of NiO, Al2O3 and ZrO2 mixed in various ratios were sintered between 1200 and 1600-degrees-C and their phase equilibria studied by X-ray diffraction and electron microscopy. Partially stabilized ZrO2 (PSZ) consisting of tetragonal ZrO2 (t-ZrO2) precipitated in the cubic ZrO2 (c-ZrO2) matrix was not formed because the solubility of NiO and/or Al2O3 in ZrO2 was not enough to stabilize the c-ZrO2 phase. Instead, t-ZrO2 particles were constrained in the matrix phase of NiO and/or spinel which was formed by reacting NiO with Al2O3. At 1600-degrees-C, t-ZrO2 equilibrated with the stoichiometric NiAl2O4 spinel when free NiO was present, with spinel of varied nickel-to-aluminium stoichiometry when Al2O3 content exceeded NiO, and with A12O3-rich spinel and free Al2O3 (corundum) when Al2O3 was saturated in spinel. The implications of these results to TBCs are discussed.
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页码：113 / 118
页数：6
相关论文
共 23 条
[21]   MICROSTRUCTURES, PROPERTIES AND FAILURE ANALYSIS OF (ZRO2-8WT-PERCENT-Y2O3)/((CO,NI)-CR-AL-Y) THERMAL BARRIER COATINGS [J].
WU, BC ;
CHANG, E ;
TU, D ;
WANG, SL .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1989, 111 :201-210
[22]   EFFECTS OF BOND COAT PRE-ALUMINIZING TREATMENT ON THE PROPERTIES OF ZRO2-8WT-PERCENT-Y2O3/CO-29CR-6AL-1Y THERMAL BARRIER COATINGS [J].
WU, BC ;
CHAO, CH ;
CHANG, E ;
CHANG, TC .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1990, 124 (02) :215-221
[23]  
YAMAGUCHI O, 1988, J AM CERAM SOC, V71, pC510, DOI 10.1111/j.1151-2916.1988.tb05821.x
123