Oxidation behavior of silicon nitride sintered with Lu2O3 additive

被引：5

作者：

Jordache, Madeleine K. ^{[1
]}

Du, Henry ^{[1
]}

机构：

[1] Stevens Inst Technol, Dept Chem Biomed & Mat Engn, Hoboken, NJ 07030 USA

来源：

JOURNAL OF MATERIALS SCIENCE | 2006年 / 41卷 / 21期

关键词：

HOT-PRESSED SI3N4; CERAMICS; STRENGTH; 1500-DEGREES-C; KINETICS;

D O I：

10.1007/s10853-006-0949-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Kyocera SN282 silicon nitride ceramics sintered with 5.35 wt% Lu2O3 were oxidized in dry oxygen at 930-1,200 degrees C. Oxidation of SN282 follows a parabolic rate law. SN282 exhibits significantly lower parabolic rate constants and better oxide morphological stability than silicon nitride containing other sintering additives under similar conditions. The activation energy for oxidation of SN282 is 107 +/- 5 kJ/mol K, suggesting inward diffusion of molecular oxygen in the oxide layer as the rate-limiting mechanism.

引用

页码：7040 / 7044

页数：5

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