Nd2Fe17 nanograins effect on the coercivity of HDDR NdFeB magnets with low boron content
来源期刊：International Journal of Minerals Metallurgy and Materials2012年第3期
论文作者：Alex A.Volinsky
文章页码：236 - 239
摘 要：Relationships between the coercivity of hydrogenation disproportionation desorption recombination（HDDR） Nd12.5Fe81.5-xCo6Bx bonded magnets and boron content were investigated.Nd2Fe17 phase with planar magnetic anisotropy is present in the microstructure when x= 4at%-5.88at%,which does not reduce the coercivity of the bonded magnets.High-resolution transmission electron microscopy（TEM） images show that Nd2Fe17 phase exists in the form of nanocrystals in the Nd2Fe14B matrix.There is an exchange-coupling interaction between the two phases so that the coercivity of HDDR Nd12.5Fe81.5-xCo6Bx bonded magnets is hardly reduced with a decrease in boron content.
Alex A.Volinsky
Department of Mechanical Engineering,University of South Florida
摘 要：Relationships between the coercivity of hydrogenation disproportionation desorption recombination（HDDR） Nd12.5Fe81.5-xCo6Bx bonded magnets and boron content were investigated.Nd2Fe17 phase with planar magnetic anisotropy is present in the microstructure when x= 4at%-5.88at%,which does not reduce the coercivity of the bonded magnets.High-resolution transmission electron microscopy（TEM） images show that Nd2Fe17 phase exists in the form of nanocrystals in the Nd2Fe14B matrix.There is an exchange-coupling interaction between the two phases so that the coercivity of HDDR Nd12.5Fe81.5-xCo6Bx bonded magnets is hardly reduced with a decrease in boron content.
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