反铁磁Fe_(1-x)Mn_x(0．30≤x≤0．55)合金的磁致伸缩  

MAGNETOSTRICTION IN ANTIFERROMAGNETIC Fe_(1-x)Mn_x(0.30≤x≤0.55) ALLOYS

作　　者：许云伟[1] 马天宇[1] 张晶晶[1] 严密[1] 

机构地区：[1]浙江大学材料科学与工程系硅材料国家重点实验室,杭州310027

出　　处：《金属学报》2008年第10期1235-1237,共3页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目50701039;新世纪优秀人才支持计划项目05-0526;长江学者和创新团队发展计划项目0651资助~~

摘　　要：采用真空感应熔炼法,制备Fe_(1-x)Mn_x(x=0.30,0.35,0.40,0.50,0.55(原子分数))合金,在1000℃保温24h,炉冷至室温.研究了不同结构Fe_(1-x)Mn_x合金样品的室温磁致伸缩性能.结果表明,x(?)0.40时,Fe_(1-x)Mn_x合金样品为γ+ε双相结构,并且ε相体积分数随Mn含量增加而减小,磁致伸缩性能较差;x>0.40时,合金样品为单一的γ相,具有良好的磁致伸缩性能.Fe_(0.50)Mn_(0.50)合金样品在1.9T磁场中的磁致伸缩可达8.73×10^(-4).Antiferromagnetic Fe1-xMnx（x=0.30, 0.35, 0.40, 0.50, 0.55 （atomic fraction）） alloys were prepared by induction melting method. A homogenization for 24 h at 1000℃ was carried out on the samples, followed by furnace cooling to room temperature. The microstructures and magnetostrictive properties of Fe1-xMnx samples were investigated. It is found that when x 〈0.40, Fe1-xMnx alloys consist of fcc γ and hcp ε phases with poor magnetostrictive property, and the volume proportion of ε phase decreases with the increase of Mn content. When x 〉0.40, the samples are single fcc 7 phase and possess much better magnetostrictive performance. The magnetostriction of Fe0.50Mn0.50 sample reaches 8.73×10^-4 in 1.9 T magnetic field.

关 键 词：FE-MN合金 反铁磁体 磁致伸缩 

分 类 号：TG113[金属学及工艺—物理冶金]