Mechanism of Interface Reaction and Magnetic Properties of Fe-TiN Prepared by High Energy Ball Milling (Chinese)
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摘要: 利用X射线衍射(XRD)结合穆斯堡尔谱和宏观磁性测量研究了高能球磨FeTiN体系的界面反应机制及界面磁性.结果表明：通过高能球磨，部分Fe原子扩散到TiN晶粒中形成顺磁相TiN(Fe)，Fe原子的扩散溶解随球磨时间增加而饱和.同时，部分TiN在球磨过程中分解成Ti和N并溶入Fe晶格形成铁磁性的Fe(Ti，N)固溶体.Ti和N原子溶入后使样品饱和磁化强度产生变化.随固溶量的增加，饱和磁化强度先增大后减小.Abstract: Mechanism of interface reaction and magnetic properties of Fe-TiN system attained by high energy ball milling were studied using Xray diffraction (XRD), Mssbauer spectroscopy and vibrating sample magnetometer(VSM). The results showed that during ball milling, a small amount of Fe atoms diffuse into the interface of TiN grains to form a paramagnetic interface phase TiN(Fe)and the diffusion of Fe atoms saturates with increasing milling time. Meanwhile, Ti and N atoms, as a result of the decomposition of fractional TiN, dissolve into the crystal lattices of Fe to form a ferromagnetic solid solution ofFe (Ti,N). The solid solution of Ti and N atoms make the saturation magnetization of powder samples rise first and then fall with the amount of Ti and N atoms increasing.
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