机械球磨中Fe与BN反应形成Fe-N合金的结构表征及其磁性  

Structural Characterization and Properties of Fe-N Alloy Prepared by Reaction between Fe and BN during Ball Milling

作　　者：郭秀芝[1] 刘力[2] 姚斌[1] 

机构地区：[1]吉林大学物理学院,长春130021 [2]北华大学理学院物理系,吉林吉林132011

出　　处：《吉林大学学报（理学版）》2008年第3期535-538,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:50472003);教育部博士点基金(批准号:20040183063)

摘　　要：以六方氮化硼(h-BN)为氮源,利用机械球磨Fe和h-BN的方法制备Fe-N非晶和六方结构ε-FexN合金,估算ε-FexN合金中N含量随球磨时间的变化,并研究两种合金在球磨过程中的形成机制和结构转变规律.利用Mossbauer谱和振动样品磁强计对Fe-N非晶和ε-FexN合金的磁性进行表征,得到了ε-FexN合金磁性能随N含量的增加由铁磁转变为顺磁的变化规律,并阐明了样品的矫顽力随球磨时间变化的规律和机制.With hexagonal BN （h-BN） as nitrogen source, an amorphous Fe-N alloy and ε-FexN alloy with hexagonal structure were prepared by mechanical milling of Fe and h-BN. The nitrogen content change was estimated in the ε-FexN alloy with milling time. We investigated the formation mechanisms and the law of structural transformation about the two kinds of alloys. Magnetic properties of the amorphous Fe-N alloy and 8ε-FexN alloy were described by Mossbauer patterns and magnetometer of vibration samples. The results show that the magnetic property of ε-FexN alloy changed from ferromagnetisium to paramagnetisium with N content increasing. The article elaborates on the law and mechanisms of the change of coercivity with boll milling time.

关 键 词：ε-FexN合金 机械球磨 矫顽力 

分 类 号：TM271[一般工业技术—材料科学与工程]