Study on the microstructures and the magnetic properties of precipitates in a Cu75-Fe5-Ni20 alloy
Study on the microstructures and the magnetic properties of precipitates in a Cu75-Fe5-Ni20 alloy
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Cu75-Fe5-Ni20合金中析出相的显微组织和磁性能研究
DOI：
10.1166/jnn.2012.4664
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发表时间：
2012
影响因子：
--
通讯作者：
B.H.KOO
中科院分区：
文献类型：
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作者：
S.KANG;M.TAKEDA;M.TAKEGUCHI;Z.HIROI;G.W.KIM;D.S.BAE;C.G.LEE;B.H.KOO
用透射电镜（TEM）研究了Cu 75-Fe 5-Ni 20合金在873 K和1073 K等温退火过程中析出相的组织演变。由于合金中的相分解，纳米级磁性颗粒在富Cu基体中随机形成。然而，随着等温退火时间的增加，在873 K和1073 K下分别观察到两个或两个以上立方和棒状纳米颗粒沿沿着100个方向线性排列的显著特征。为了研究Cu-Fe-Ni合金中析出相的电磁性质，还补充了超导量子干涉仪（SQUID）磁强计和物理性质测量系统（PPMS）。本研究揭示了显着的影响，试样的磁性能是密切相关的Cu-Fe-Ni合金的微观结构，其中微观结构显着依赖于等温退火温度。
The microstructural evolutions of precipitates formed in a Cu75–Fe5–Ni20 alloy on isothermal annealing at 873 K and 1073 K have been investigated by means of transmission electron microscopy (TEM). Nano-scale magnetic particles were formed randomly in the Cu-rich matrix after receiving a short annealing due to phase decomposition in the alloy. With increasing the isothermal annealing time, however, the striking features that two or more nano-scale particles with a cubic shape and a rod shape were aligned linearly along 100 directions were observed on isothermal annealing at 873 K and 1073 K, respectively. To investigate electro-magnetic properties of precipitates in a Cu–Fe–Ni alloy, the superconducting quantum interference device (SQUID) magnetometer and physical property measurement system (PPMS) were also complemented. The present study revealed significant influences that the magnetic properties of the specimens were closely related to the microstructures in the Cu–Fe–Ni alloy, which microstructures significantly depend on the isothermal annealing temperature.