热处理对Fe_(81)Ga_(19)合金组织结构与磁致伸缩性能的影响(英文)  

Effects of Heat-treatment on the Microstructure and Magnetostriction of Fe_(81)Ga_(19)

作　　者：马云庆[1] 赖三哩[1] 杨水源[1] 杨晶晶[1] 施展[1] 

机构地区：[1]厦门大学材料学院材料科学与工程系,厦门361005

出　　处：《材料导报》2009年第14期5-7,共3页Materials Reports

基　　金：国家自然科学基金(50771086);福建省新世纪优秀人才计划(NCETFJ)

摘　　要：采用电弧熔炼法制备了Fe81Ga19合金多晶样品,研究了不同热处理工艺对合金组织结构及磁致伸缩性能的影响。样品经过700℃、800℃和900℃保温后采用空冷、炉冷和淬火3种冷却方式。结果显示,经过不同热处理后样品的微观组织均为单相bcc结构,而磁致应变从34×10-6到94×10-6不等;当热处理温度为800℃时,淬火处理后可获得较好的磁致伸缩性能(88×10-6),而热处理温度较高(900℃)时,采用炉冷的方式可获得较好的磁致伸缩性能(94×10-6)。推测热处理方式和晶体取向对Fe81Ga19合金磁致伸缩性能有较重要的影响。Button ingots of polycrystalline Fe81Ga19 alloy are prepared by arc-melter, and the effects of different heat-treatments on their microstructure and magnetostriction are investigated. The specimens are annealed at 700℃, 800℃, and 900℃, and then cooled at different speeds, i.e. quenching into ice water, air cooling, or furnace cooling. The results show that specimens after different heat-treatments all exhibit single bcc structure, but the magnetostrictions vary from 34 × 10^-6 to 94 × 10^-6; When the heating temperature is 800℃, good magnetostriction （88 × 10^-6） can be obtained by quenching. On the other hand, when the specimen is heated at a higher temperature （900℃）, furnace cooling is a better way to get good magnetostriction （94×10^-6）. It is speculated that the heat-treatment temperature and the crystal orientation may be two primary factors influencing the magentostriction of Fe81Ga19 alloy.

关 键 词：磁致伸缩 Fe81Ga19 热处理 

分 类 号：TG132.27[一般工业技术—材料科学与工程] TG161[金属学及工艺—合金]