摘要
采用快淬和晶化退火法制备了成分为Nd8.5Fe75-xCo5Cu1Nb1Zr3CrxB6.5(x=0.5,1,2)的纳米晶复合永磁合金,研究了Cr的添加对合金晶粒尺寸及磁性能的影响,结果表明适量Cr的添加能有效抑制磁性相晶粒长大,提高了合金的矫顽力.Cr含量为1%(at%),快淬速度为15.0m/s的合金经690℃/4min的晶化处理,由晶化磁粉粘结所得到的磁体最佳磁性能为:Br=0.62T,jHc=806.4kA/m,(BH)max=69.0kJ/m3.
Nd8. 5Fe75-xCosCu1Nb1Zr3CrxB6.5 （ x = 0.5, 1, 2 ） allys were prepared by melt - spun and subsequent annealing. Influence of chromium additions on the crystalline size and magnetic properties of nanocomposite Nd2Fe14B/α- Fe magnets has been investigated. The significant improvements of the intrinsic coercivity originate from the refinement of the grains of the samples by introducing Cr. The optimum magnetic properties can be obtained for x = 1 after annealing the ribbons （15.0m/s）at 690℃ for 4min, the remanenee （Br）,intrinsic （jHc） and maximum energy product （（ BH ）max ） of bonded magnets are Br = 0.62T, j H c = 806. 4kA/m, （BH） max = 69.0kJ/m^3.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2005年第4期381-383,共3页
Materials Science and Technology
基金
国家高技术研究发展计划资助项目(2002AA302602-2)上海市青年启明星计划基金资助(03QF14018).
关键词
纳米晶复合
Cr的添加
晶粗民寸
磁性能
交换耦合
nanocomposite
chromium additions
crystalline size
magnetic properties
exchange coupling
