纳米晶双相Nd_(10.5)Fe_(78-x)Co_5ZrB_(6.5)合金磁性能与结构的研究  

Study on Magnetic Properties and Microstructure of Nanocomposite Nd_(10.5)Fe_(78-x)Co_5Zr_xB_(6.5) Alloys

作　　者：谭晓华[1] 徐晖[1] 戚楠楠[1] 倪建森[1] 候雪玲[1] 董远达[1] 

机构地区：[1]上海大学,上海200072

出　　处：《稀有金属材料与工程》2005年第12期2006-2008,共3页Rare Metal Materials and Engineering

基　　金：国家高技术研究发展计划(2002AA302602-2);上海市科技启明星(03QF14018)

摘　　要：用熔体快淬法和晶化热处理工艺制备Nd_(10.5)Fe_(78-x)Co_5Zr_xB_(6.5)(x=0,2,3,4,5)纳米晶双相永磁材料,研究了其磁性能与结构的变化。结果表明：适量地添加(2 at％)Zr能显著提高合金的内禀矫顽力,并且可以有效抑制合金中的软、硬磁相的晶粒长大,获得晶粒尺寸为20 nm的微观结构,使得合金中的软磁相和硬磁相发生比较充分的交换耦合作用,从而有效地提高合金的磁性能。The magnetic properties and microstructure of nanocomposite Nd10.5Fe78-xCo5ZrxB6.5 （x=0, 2, 3, 4, 5） alloys were investigated. It has been found that the intrinsic coercivity could be significantly improved by the addition of 2at% Zr. The small amount addition of Zr may suppress the growth of grains of α-Fe and Nd2Fe14B phases..A finer and more homogeneous microstructure with an average grain size of 20 nm could be obtained for Nd10.5Fe78-xCo5ZrxB6.5 alloy. The enhancement of magnetic properties by Zr addition is found to be mainly due to the microstructure refinement, which leads to an enhanced exchange coupling between the hard phase and soft phase.

关 键 词：纳米晶双相 晶粒尺寸 磁性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]