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Fe83Ga17合金熱處理過程中的磁致伸縮性能和結構分析

Magnetostrictive properties and structure of Fe83Ga17 during heat treatment

  • 摘要: 實驗研究了熱處理對〈110〉取向多晶Fe83Ga17合金磁致伸縮性能的影響.發現Fe83Ga17經過淬火處理后,飽和磁致伸縮應變明顯增大.在25MPa預壓力作用下,飽和磁致伸縮應變超過了300×10-6.中子衍射和差熱分析實驗表明,Fe83Ga17合金在爐冷過程中存在相結構變化,結構變化導致合金磁致伸縮應變的改變,淬火處理能夠抑制合金中DO3相的形成,從而使Fe83Ga17合金的磁致伸縮應變增大.

     

    Abstract: The effect of heat treatment on the magnetostrictive properties of a (110)-oriented polycrystal Fe83Ga17 alloy was investigated. It was found that the saturation magnetostrictive strain of the quenched Fe83Ga17 alloy exceeded 300×10-6 under a compressive stress of 25 MPa. The results of Neutron diffraction and differential thermal analysis confirmed that slow cooling leads to the change of phase structure which resuits in the change of magnetostrictive strain. The increase in magnetostrictive strain of the Fe83Ga17 alloy treated by quenching is explained as that the long-range DO3 is suppressed.

     

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