Authors: MingGang Zhu YanFeng Li Wei Li LiYun Zheng Dong Zhou HaiBo Feng Lang Chen An Du
Publish Date: 2015/09/04
Volume: , Issue: , Pages: 1-4
Abstract
The relationship between the microstructure and magnetic properties of Nd–Fe–B sintered magnet compressed by shock wave with 626 GPa ≤ p ≤ 716 GPa was investigated It reveals that Nd–Fe–B magnets show a demagnetization behavior after compressed by shock wave The intergranular fracture is the main occurring phenomenon in the shock wavecompressed magnets The coercivity of the shock wavecompressed Nd–Fe–B magnets could be recovered after repeating the annealing process It suggests that only the morphology change just like the intergranular fracture occurs and there is no structural change in the grain boundary phase in the shock wavecompressed magnet Matrix phase grain interconnection microcracks and pores and alterant orientation relationship between matrix phase and grain boundaries phase are considered as induced factors of demagnetizationThis study was financially supported by the National High Technology Research and Development Program of China No 2011AA03A401 the National Basic Research Program of China No 2014CB643701 the National Natural Science Foundation of China Nos 51171049 and 51271060 and the National Key Technology RD Program No 2012BAE02B01
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