图书来源：二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者：唐仁政 田荣璋
出版时间：2009-05
定 价：320元
图书ISBN：978-7-81105-831-4
出版单位：中南大学出版社
Li Dong(Central Iron & Steel Research Institute,Beijing 100081,P.R.China)K.J.Strnat H.F.Mildrum(University of Dayton,USA)
摘 要：<正> Magnetization and demagnetization curves and hysteresis loops applied different magnetizing.fields insintered Nd-Fe-B and Nd-Dy-Fe-B magnets from thermally demagnetized and dc field-demagnetizedstates were investigated at temperatures of up to 150℃.The first-quadrant remagnetization curves and thecurves of coercive forces MHC versus rernagnetizing fietds Hm from dc field-demagnetized state at roomtemperature show a step around magnetizing field as absolute value of the maximum intrinsic coercivity.Thesteps of MHC-Hm curves shifted to lower remagnetizing fields and the shapes of magnetization curveschanged from step type to precipitous type when temperature went up to 100～150℃ or after the specimenwas thermally demagnetized at a temperature higher than the Curie temperature.The steep rise of kneecoereivity with increasing magnetizing field is behind that of MHC.Note that the magnetic hardening insintered Nd-Fe-B magnets is controlled by pinning of domain walls.
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