Oxidation of sintered Si3N4 in wet air

被引：0

作者：

Liu, XY ^{[1
]}

机构：

[1] Zhuzhou Cemented Carbide Works, R&D Ctr, Zhuzhou 412000, Hunan, Peoples R China

来源：

PROCEEDINGS OF THE FIRST CHINA INTERNATIONAL CONFERENCE ON HIGH-PERFORMANCE CERAMICS | 2001年

关键词：

D O I：

暂无

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 oxidation of sintered Si3N4 was investigated in flowing wet air with 20 vol% H2O at 120 degreesC. The oxidation of sintered Si3N4 in wet air is more severe than that in natural air. Kinetic measurements indicate that the oxidation of sintered Si3N4 in wet air shows two processes. During the first process which is called direct oxidation, Si3N4 reacts with H2O and O-2 directly, and the relation of weight gain - oxidation time is linear. The second process which is called passive oxidation is controlled mainly by diffusion of ions and molecules through the oxide layer.

引用

页码：673 / 675

页数：3

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