Fabrication and Oxidation-resistance Property of Coated ZrB2-YAG-Al2O3 Multi-phase Ceramics

被引：1

作者：

Song, Jieguang ^{[1
]}

Wang, Fang ^{[1
]}

Xu, Minghan ^{[1
]}

Li, Shibin ^{[1
]}

Ji, Gangchang ^{[1
]}

机构：

[1] Jiujiang Univ, Jiujiang Key Lab Green Remfg, Sch Mech & Mat Engn, Jiujiang 332005, Jiangxi, Peoples R China

来源：

TESTING AND EVALUATION OF INORGANIC MATERIALS III | 2013年 / 544卷

关键词：

Ultra-high-temperature ceramics; zirconium diboride; oxidation property; COMPOSITES; INFILTRATION;

D O I：

10.4028/www.scientific.net/KEM.544.347

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zirconium diboride is widely applied because of some excellent performances. The results show the Al(OH)(3)-Y(OH)(3)/ZrB2 composite powders is prepared by a co-precipitation method, the shell-core structure Al2O3-Y2O3/ZrB2 composite powders is prepared by sintering Al(OH)(3)-Y(OH)(3)/ZrB2 composite powders. The coating and density ZrB2-YAG-Al2O3 multi-phase ceramics is sintered at 1700 degrees C, 20MPa for 4min by using Al2O3-Y2O3-80wt%ZrB2 composite powders, the oxidation weight is increased with increasing the oxidation temperature, however, the oxidation weight is decreased with increasing the YAG-Al2O3 content. ZrB2 reacted with O-2 to form B2O3, and B2O3 is reacted with Al2O3 to form Al18B4O33, which is melted and coated on the surface of ceramics to form a protective layer for the oxidation resistance of ceramics at high temperature.

引用

页码：347 / 350

页数：4

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