Fe-50Ni alloy with ordered L1(0) structure prepared by cubic pressing
Fe-50Ni alloy with ordered L1(0) structure prepared by cubic pressing
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立方压制制备有序L1(0)结构的Fe-50Ni合金
DOI：
10.1016/j.matlet.2020.128563
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发表时间：
2020
影响因子：
3
通讯作者：
Ouyang Xiaoping
中科院分区：
文献类型：
--
作者：
Wang Xinming;Wen Tao;Sun Lin;Lou Jia;He Hao;Chen Yongzhi;Ouyang Xiaoping
采用立方挤压和热处理工艺制备了具有短程有序L10相的Fe-50 Ni块体合金。将烧结态Fe-50 Ni合金在310 °C和5GPa下进行了1 h的立方压制，然后在310 °C下进行了90 d的回火。振动样品磁强计测试证明了在合金中形成硬磁相，其显著影响包括软磁A1相的基体的磁性能。X射线衍射和场发射透射电子显微镜证实了有序L10相的存在。在立方挤压过程中，原子扩散距离缩短，合金中缺陷数量显著增加，促进了有序相的形核和长大。长时间的回火过程进一步增加了有序域的大小。
Bulk Fe-50Ni alloys with a short-range ordered L10phase were prepared by cubic pressing and subsequent heat treatment. Sintered Fe–50Ni alloys were cubic pressed at 310 °C and 5 GPa for 1 h and then tempered at 310 °C for 90 d. Vibrating sample magnetometer tests proved the formation of a hard magnetic phase in the alloys, which significantly affected the magnetic properties of the matrix comprising the soft magnetic A1 phase. X-ray diffraction and field emission transmission electron microscopy confirmed the existence of the ordered L10phase. During the cubic pressing process, the distance of atomic diffusion was shortened and the number of defects in the alloy significantly increased, which promoted the nucleation and growth of the ordered phase. A long-duration tempering process further increased the size of the ordered domain.