摘要
用化学共沉淀法和在NH3／H2气氛下氮化处理得到了一系列不同Ni含量的Fe-Ni-N多晶粉末。分别用X射线衍射（X-ray DiffractionXRD）和振动样品磁强计（VibratingSampleMagnetometerVSM）做了结构和磁性的测量。结果表明：制备单相γ′（Fe1-xNix）4N粉末与NH3／H2气流比、热处理温度以及时间有关。随着Ni含量的增加，材料的晶格常数逐渐减小；饱和磁化强度（Ms）随着Ni含量的增加而下降，矫顽力（Hc）的变化比较复杂。Ni含量在0．20～0．26之间较容易得到单相的γ′（Fe1-xNix）4N粉末，并且有较高的磁性。计算了Fe0.99Ni0.91N多晶粉末的饱和磁化强度，结果与实验值很接近。
A series of Fe-Ni-N polycrystalline powder are prepared by co-deposition and nitriding in NH3/H2. The changes of the structure and magnetism are investigated by X-ray Diffraction and Vibrating Sample Magnetometer. The results reveal that the preparation of the γ′（Fe1-xNix）4N monophase powder is related to NH3/H2 gas flow ratio, heat treatment temperature and time. With the increase of Ni content, the lattice parameter of y＇-（ Fel _,Ni, ）4 N and the saturated magnetization intensity decrease coupled with complicated changes of the coercive forces. The γ′（Fe1-xNix）4Nmonophase powder is easily obtained within the Ni concentration range 0. 18≤ x≤0.26, and has comparatively high magnetism. The calculated saturated magnetization of Fe0.99Ni0.01 N is approximate to the experiment value.
出处
《福建工程学院学报》
CAS
2007年第1期33-38,共6页
Journal of Fujian University of Technology
