Magnetostriction of 〈100〉 oriented Fe–Ga rods with large diameter  

作　　者：Ji-Heng Li Xue-Xu Gao Xi-Ming Xiao Xiao-Qian Bao Mao-Cai Zhang 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing

出　　处：《Rare Metals》2015年第7期472-476,共5页稀有金属（英文版）

基　　金：financially supported by the Major State Basic Research Development Program of China (973 Program) (No. 2011CB606304);the Program for New Century Excellent Talents in University of China (No. NCET-09-02120);the National Natural Science Foundation of China (No. 51271019)

摘　　要：The Fe83Ga17 alloy rods with h100 i preferential orientation was prepared by directional solidification method.The dimension of oriented Fe83Ga17 rods is large up to 40 mm greater than diameter in previous investigations of3–10 mm.The growth direction of columnar grain is nearly parallel to the solidification direction of rods.The deviation angle between axial direction and h100 i direction of columnar crystal was investigated by method of electron backscattering diffraction, and the deviation is smaller than10°.The large columnar grain and h100 i preferential orientation along axial direction of rods could be attributed to the calm solid–liquid interface during solidification process that is difficultly formed due to electromagnetism agitation in induction heating zone-melting method.The corresponding magnetostriction is large up to 290 9 10-6under pre-compressive press of 15 MPa.The Fe83Ga17 alloy rods with h100 i preferential orientation was prepared by directional solidification method.The dimension of oriented Fe83Ga17 rods is large up to 40 mm greater than diameter in previous investigations of3–10 mm.The growth direction of columnar grain is nearly parallel to the solidification direction of rods.The deviation angle between axial direction and h100 i direction of columnar crystal was investigated by method of electron backscattering diffraction, and the deviation is smaller than10°.The large columnar grain and h100 i preferential orientation along axial direction of rods could be attributed to the calm solid–liquid interface during solidification process that is difficultly formed due to electromagnetism agitation in induction heating zone-melting method.The corresponding magnetostriction is large up to 290 9 10-6under pre-compressive press of 15 MPa.

关 键 词：Fe–Ga alloys Directional solidification Crystallog 

分 类 号：TG132.2[一般工业技术—材料科学与工程]