硅酸盐学报

含铁氮化硅的氧化行为

作者：管甲锁1 成来飞1 王耀辉1 2

单位：1. 西北工业大学超高温结构复合材料国防科技重点实验室西安 710072 2. 内蒙合成化工研究所呼和浩特 010010

关键词：氮化硅氮化硅铁氧化活化能

分类号：TB321

出版年,卷(期):页码：2017,45(9):1335-1339

DOI：10.14062/j.issn.0454-5648.2017.09.16

摘要：

研究了含铁氮化硅陶瓷在1 300~1 500 ℃条件下空气中的氧化行为。结果表明：铁的存在会使氮化硅的氧化速率稍有提高，含铁氮化硅的氧化过程符合抛物线规律，氧化活化能为285 kJ/mol。元素面分布分析表明，氮化硅氧化过程中铁扩散到陶瓷表面，导致其抗氧化能力下降，但其空气中的抗氧化能力仍能满足高温下的应用需求。

The oxidation behavior of silicon nitride ceramics containing iron in air at 1 300–1 500 ℃ was investigated. The results indicate that the presence of iron in the ceramics causes a slight increase in the oxidation rate. The oxidation of Fe–Si3N4 obeys the parabolic oxidation law, with an activation energy of 285 kJ/mol. Based on the element mapping analysis, iron diffused to the surface during the oxidation process, causing a decrease in the oxidation resistance. However, the oxidation rate of Fe–Si3N4 is still appropriate for applications in air at high temperatures.

基金项目：

国家自然科学基金重点项目(51632007)资助。

作者简介：

管甲锁(1964—)，男，博士研究生。

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