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本工作利用正电子湮灭方法研究了时效退火处理对两种磁性材料Fe-Cr-Co-Si和Sm_2(Co、Fe、Cu、Zr)_(17)微观结构的影响。Fe-Cr-Co-Si永磁合金具有机械加工性能好,最大磁能积高的优点,适于在需要加工的情况下应用。Sm_2(Co,Fe,Cu,zr)_(17)是一种性能十分优良的第二代稀土化合物的永磁材料。它的最大磁能积高达30兆高·奥。这两种永磁材料经时效退火处理,磁性能(矫顽力和磁能积)明显提高。为了进一步提高磁性能和继续设计新的磁性材料,就需要深入探讨材料的宏观性能和微观结构之间的联系。这是当前磁性材料物理研究的一个显著的趋势。目前在研究这类问题的实验中,国外已经使用了核磁共振、穆斯鲍尔效应和μ介子
In this work, the effects of aging treatment on the microstructures of Fe-Cr-Co-Si and Sm 2 (Co, Fe, Cu, Zr) _ (17) were studied by positron annihilation. Fe-Cr-Co-Si permanent magnet alloys have the advantages of good machinability, high maximum energy product, and are suitable for applications where machining is required. Sm_2 (Co, Fe, Cu, Zr) _ (17) is a kind of permanent magnet material of the second generation of rare earth compounds with excellent properties. It’s maximum energy product up to 30 megabytes · Austria. Both permanent magnet materials after aging annealing, magnetic properties (coercivity and magnetic energy product) increased significantly. In order to further improve the magnetic properties and continue to design new magnetic materials, we need to further explore the macroscopic properties of materials and the relationship between the microstructure. This is a significant trend of the current magnetic material physics research. Currently in the study of such problems in experiments, foreign countries have used the NMR, Moose Bauer effect and μ meson