Sapphire matrix composites reinforced with single crystal YAG phases

被引：140

作者：

Waku, Y

Ohtsubo, H

Nakagawa, N

Kohtoku, Y

机构：

[1] Ube Research Laboratory, Corporate Research and Development, UBE Industries, Ltd., Ube City, Yamaguchi, 755, 1978-5, Kogushi

来源：

JOURNAL OF MATERIALS SCIENCE | 1996年 / 31卷 / 17期

关键词：

D O I：

10.1007/BF00366367

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An investigation of fabrication technology on eutectic composites consisting of Al2O3 phases and YAG (Y3Al5O12) phases was carried out by applying the unidirectional solidification process. Unidirectionally solidified eutectic composites consisting of [110] sapphire phases and [420] single crystal YAG phases could be fabricated successfully by lowering a Mo crucible at a speed of 5 mm h(-1) under a pressure of 10(-5) mmHg of argon. These eutectic composites have excellent high-temperature properties up to 1973 K. For example, the flexural strength is 360-500 MPa independent of testing temperature from room temperature to 1973 K. Oxidation resistance at 1973 K in an air atmosphere is superior to SiC and Si3N4 and the microstructure of these eutectic composites is stable even after heat treatment at 1773 K for 50 h in an air atmosphere.

引用

页码：4663 / 4670

页数：8

共 14 条

[1]

BOWMAN R, 1989, ADV MATER PROCESS, V8, P35

[2] HIGH-RESOLUTION TECHNIQUES AND APPLICATION TO NONOXIDE CERAMICS [J].

CLARKE, DR .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1979, 62 (5-6) :236-246

[3] STRENGTH OF CERAMICS [J].

DAVIDGE, RW ;

EVANS, AG .

MATERIALS SCIENCE AND ENGINEERING, 1970, 6 (05) :281-&

[4] MICROSTRUCTURE OF DIRECTIONALLY SOLIDIFIED MGO-ZRO2 EUTECTIC [J].

ECHIGOYA, J ;

HAYASHI, S ;

SASAKI, K ;

SUTO, H .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 1984, 48 (04) :430-434

[5] DEFORMATION-BEHAVIOR OF SAPPHIRE VIA THE PRISMATIC SLIP SYSTEM [J].

KOTCHICK, DM ;

TRESSLER, RE .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1980, 63 (7-8) :429-434

[6]

LAMICQ P, 1993, P JAP EUR S COMP MAT, P4

[7]

LAMICQ PJ, 1986, AM CERAM SOC BULL, V65, P336

[8]

Levin EM, 1969, Phase diagrams for ceramists: 1969 Supplement

[9] MICROSTRUCTURE, MICROCHEMISTRY, AND FLEXURAL STRENGTH OF MULLITE CERAMICS [J].

MIZUNO, M .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (12) :3017-3022

[10]

Sato T., 1988, Journal of the Society of Materials Science, Japan, V37, P77, DOI 10.2472/jsms.37.77

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