The effect of Ti addition on microstructures and magnetic properties of B-lean(Pr,Nd)_(31.1)Fe_(67.1-x)(CoCuGa)_(1.4)Ti_(x)B_(0.9)(wt%,x=0.0,0.1,0.2,0.3,0.4)sintered magnets were investigated.The remanence Bris slight...The effect of Ti addition on microstructures and magnetic properties of B-lean(Pr,Nd)_(31.1)Fe_(67.1-x)(CoCuGa)_(1.4)Ti_(x)B_(0.9)(wt%,x=0.0,0.1,0.2,0.3,0.4)sintered magnets were investigated.The remanence Bris slightly reduced due to the deteriorated orientation degree and the diminished volume fraction of main phase caused by the existence of rod-shaped Ti-B-rich phase.However,the HcJobviously increases from1145 kA/m for x=0.0 sample to 1515 kA/m for x=0.2 sample.The results demonstrate that the increments of coercivity for x=0.2 and x=0.0 samples after post-sinter annealing(PSA)are 62.9%and 20.6%,respectively.Rod-shaped Ti-B-rich phase forms after Ti doping,which leads to the existence of6:13:1 type RE-Fe-(Cu,Ga)phase with high Fe content at triple junctions.This is beneficial to the formation of continuous thin grain boundaries with low Fe content,which can weaken the exchange coupling interaction between adjacent grains,leading to the improved coercivity.展开更多
基金supported by the National Natural Science Foundation of China(52061015,52371188)Young Talents Program of Jiangxi Provincial Major Discipline Academic and Technical Leaders Training Program(20212BCJ23008)+2 种基金Jiangxi Provincial Natural Science Foundation(20212BAB214018)Technology Program of Fujian Province(2021T3063)Jiangxi Province Key Laboratory of Magnetic Metallic Materials and Devices(2024SSY05061)。
文摘The effect of Ti addition on microstructures and magnetic properties of B-lean(Pr,Nd)_(31.1)Fe_(67.1-x)(CoCuGa)_(1.4)Ti_(x)B_(0.9)(wt%,x=0.0,0.1,0.2,0.3,0.4)sintered magnets were investigated.The remanence Bris slightly reduced due to the deteriorated orientation degree and the diminished volume fraction of main phase caused by the existence of rod-shaped Ti-B-rich phase.However,the HcJobviously increases from1145 kA/m for x=0.0 sample to 1515 kA/m for x=0.2 sample.The results demonstrate that the increments of coercivity for x=0.2 and x=0.0 samples after post-sinter annealing(PSA)are 62.9%and 20.6%,respectively.Rod-shaped Ti-B-rich phase forms after Ti doping,which leads to the existence of6:13:1 type RE-Fe-(Cu,Ga)phase with high Fe content at triple junctions.This is beneficial to the formation of continuous thin grain boundaries with low Fe content,which can weaken the exchange coupling interaction between adjacent grains,leading to the improved coercivity.
