含铁氮化硅的氧化行为（英文）  

Oxidation Behavior of Silicon Nitride Containing Iron

作　　者：管甲锁 成来飞[1] 王耀辉[1,2] 

机构地区：[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

出　　处：《硅酸盐学报》2017年第9期1335-1339,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金重点项目(51632007)资助

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 k J/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-SiaN4 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.

关 键 词：氮化硅 氮化硅铁 氧化 活化能 

分 类 号：TB321[一般工业技术—材料科学与工程]