摘要
铁纤维在空气中易与氧和水发生反应而氧化,影响其使用寿命。在铁纤维表面涂覆SiO2涂层,借助扫描电镜、能谱分析、热重分析和X射线衍射分析技术,对其改性前后的形貌、成分、物相及抗氧化能力进行了分析。结果表明,铁纤维表面涂覆SiO2后,其主要成分保持不变,在界面处形成了Si-O-Si网络,使铁纤维开始被氧化的温度从250℃提高到280℃,抗氧化能力明显增强。
Iron fiber is easy to react with oxygen and water in atmosphere,which contributes to reduce the life span of the iron fiber.Thus iron fiber was modified with SiO_2 coating.The microstructure,composition,antioxidation behavior,and crystallization of SiO_2-coated iron fiber were characterized by means of scanning electron microscopy,energy dispersive X-ray analysis,thermal gravimetry,and X-ray diffraction. The oxidation and antioxidation mechanisms of the iron fiber were then discussed in detail. Results showed that there was no obvious change in the main compositions on the interface after surface modification of iron fiber, but Si-O-Si bonds were formed thereat. The SiO_2 coating made the onset-oxidation temperature of the iron fiber raised form 250 ℃ to 280 ℃, indicating that the surface modification helped to improve the antioxidation ability of the iron fiber.
出处
《材料保护》
CAS
CSCD
北大核心
2005年第8期5-8,共4页
Materials Protection
关键词
SiO2涂层
铁纤维
抗氧化
性能
机理
SiO_2 coating
iron fiber
antioxidation
behavior
mechanism
