【摘要】 Fe-Ga合金是人们在新型高性能磁致伸缩材料探索中的一个重要发现,具有高应力灵敏度、良好的热-机械性能和磁致伸缩性能,填补了传统磁致伸缩材料和稀土超磁致伸缩材料之间的空白,在超声领域和微位移器等方面有较大的潜在应用价值,应用前景广阔。本文从Ga含量及相结构、第三组元、制备方法、压力和温度四个部分阐述Fe-Ga磁致伸缩材料的研究进展及研发趋势,总结了Ga含量及相结构、第三组元对Fe-Ga合金的磁致伸缩性能的影响,Fe-Ga合金的磁致伸缩性能与Ga含量密切相关,不同的第三组元对合金磁致伸缩性能的影响也不同;Fe-Ga合金的制备方法主要有定向凝固法、甩带急冷法、轧制法、拉丝法等方法,比较了各种制备方法对材料性能的影响;阐述了应力场和温度对Fe-Ga合金的磁致伸缩性能的影响,其中应力场对Fe-Ga合金的磁致伸缩性能有积极影响,但Fe-Ga合金磁致伸缩的温度依赖性比较复杂,磁致伸缩随温度变化的幅度与趋势都取决于合金结构。更多还原

【Abstract】 During the process of exploring new high-performance magnetostrictive materials,Fe-Ga alloy was an important discovery with high stress sensitivity,good thermal-mechanical properties and magnetostrictive properties.It filled the blank between the traditional magnetostrictive materials and rare earth giant magnetostrictive materials,and had significant potential application value and wide application prospects in ultrasonic field and micro displacement device.This article introduced recent R & D progress and trend of Fe-Ga alloy from following four parts: Ga content and phase structure,the third element,preparation method and pressure & temperature.It summarized the influence of Ga content & phase structure and the third element on the magnetostrictive properties of Fe-Ga alloy.The magnetostrictive properties of Fe-Ga alloy were closely related to Ga content;different third elements had different influence on magnetostrictive properties of Fe-Ga alloy.The preparation methods of Fe-Ga alloy mainly include directional solidification method,melt-spun method,rolling method,drawing method,etc.The influences of different preparation methods on material properties were also compared.The article also explained the influence of stress field and temperature on magnetostrictive properties of Fe-Ga alloy.The stress field had positive influence on magnetostrictive properties of Fe-Ga alloy.But the temperature dependence of the Fe-Ga alloy′s magnetostrictive properties was complex and the magnetostrictive amplitude and trend of Fe-Ga alloy in different temperatures were subject to its alloy structure.更多还原