Effect of bonding process on the properties of isotropic epoxy resin-bonded Nd-Fe-B magnets  

作　　者：ZHANG Xiuhai XIONG Weihao 

机构地区：[1]State Key Laboratory of Material Processing and Die ＆ Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Rare Metals》2009年第3期248-252,共5页稀有金属（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 50074014);the Science Foundation of Hubei Province,China (No. 2003ABA092)

摘　　要：Bonded NdFeB magnets were prepared by compression molding. The effect of preparation technology on their magnetic and mechanical properties was studied through the analysis of density, Br, Hcj, （BH）max, bending strength, and compressive strength of the bonded magnets. The results showed that the magnetic properties decreased with increasing binder content, whereas the mechanical properties increased. Br and （BH）max increased with rising pressure, whereas Hcj decreased. For a fixed mass fraction of the binder, the optimal pressure was 620 MPa and the best thermosetting temperature was 160°C. These conditions made the bonded magnets have the optimal mechanical properties. Scanning electron microscopy （SEM） analyses of the fracture surfaces indicated that the epoxy resin bonded magnets exhibited brittle behavior.Bonded NdFeB magnets were prepared by compression molding. The effect of preparation technology on their magnetic and mechanical properties was studied through the analysis of density, Br, Hcj, （BH）max, bending strength, and compressive strength of the bonded magnets. The results showed that the magnetic properties decreased with increasing binder content, whereas the mechanical properties increased. Br and （BH）max increased with rising pressure, whereas Hcj decreased. For a fixed mass fraction of the binder, the optimal pressure was 620 MPa and the best thermosetting temperature was 160°C. These conditions made the bonded magnets have the optimal mechanical properties. Scanning electron microscopy （SEM） analyses of the fracture surfaces indicated that the epoxy resin bonded magnets exhibited brittle behavior.

关 键 词：Nd-Fe-B bonded magnets magnetic properties mechanical properties brittle behavior epoxy resin 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TM273[一般工业技术—材料科学与工程]