Factors Affecting the Squareness of Hysteresis Loops of Sintered NdFeB Magnets
来源期刊：JOURNAL OF RARE EARTHS2007年增刊第1期
论文作者：Wang Xianying Jin Minglin Wang Zhanyong
Key words：NdFeB; squareness of hysteresis loop; abnormal grain growth; magnetizing reversal;
Abstract: Investigation into the magnets with different squareness of hysteresis loop (SHL) reveals that the microstructure of sintered NdFeB magnets has great effects on the SHL of the magnets. The abnormal grain growth deteriorates the SHL seriously. The shape of the grain and the grain boundary affect the intensity of demagnetization field, and consequently on the SHL. The added elements have effects on the phase structures and distributions in the magnets, which influences the uniform of demagnetization field.
Wang Xianying1，Jin Minglin1，Wang Zhanyong1
(1.Department of Materials Engineering, Shanghai Institute of Technology, Shanghai 200235, China)
Abstract:Investigation into the magnets with different squareness of hysteresis loop (SHL) reveals that the microstructure of sintered NdFeB magnets has great effects on the SHL of the magnets. The abnormal grain growth deteriorates the SHL seriously. The shape of the grain and the grain boundary affect the intensity of demagnetization field, and consequently on the SHL. The added elements have effects on the phase structures and distributions in the magnets, which influences the uniform of demagnetization field.
Key words:NdFeB; squareness of hysteresis loop; abnormal grain growth; magnetizing reversal;
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