退火温度对纳米晶FeCoNbVSiBCu合金软磁性能的影响  

Influence of Annealing Temperatures on Soft Magnetic Properties of Nanocrystalline FeCoNbVSiBCu Alloy

作　　者：王治[1] 王光建[1] 胡晓英[1] 韩献堂[1] 马晓华[1] 

机构地区：[1]天津大学理学院,天津300072

出　　处：《天津大学学报》2007年第2期239-242,共4页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金资助项目(50271047);天津市自然科学基金资助项目(003601811)

摘　　要：研究了460-640℃等温退火0.5 h后纳米晶(Fe0.5Co0.5)73.5Nb2V1Si13.5B9Cu1合金高温软磁性能.实验结果表明,460℃退火可获得较低的矫顽力.随着退火温度的升高,软磁相α-FeCo(Si)晶粒尺寸逐渐长大及硬磁相Fe2B的析出,导致矫顽力逐渐增大.实验发现,460℃退火后虽可获得较高的初始磁导率μi,但在高于200℃时,μi随温度的升高明显衰减;适当提高退火温度可延缓μi在高温下的衰减.例如580℃退火后,μi在600℃以下衰减很少.实验结果对寻求新型高温纳米晶软磁合金有一定意义.The soft magnetic properties of elevated temperatures were investigated for nanocrystalline （ Fe0.5 Co0.5 ） 73.5 Nb2V1Si13.5 B9Cu1 alloy annealed at 460-640℃ for 0.5 h. A low coercivity was obtained for the alloy annealed at 460℃. With the increase of annealing temperature, the grain size of α-FeCo （Si） soft magnetic phase grows gradually, and a Fe2B hard magnetic phase precipitates from the residual amorphous phase, which leads to the increase of coercivity. It was found that the high initial permeability of the alloy annealed at 460℃ drops a lot at high temperature over 200℃. On the other hand, increasing annealing temperature can make the initial permeability more stable at high temperature, for example, the initial permeability of sample annealed at 580℃ can keep less decrease below 600℃ which is significant for seeking new high-temperature soft materials.

关 键 词：退火温度 初始磁导率 双相纳米晶合金 交换劲度 

分 类 号：TG132.2[一般工业技术—材料科学与工程] TG113.22[金属学及工艺—合金]