Spark Plasma Sintering Bulk Sm2 Fe17NxMagnets
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第1期
论文作者：Ji Yongcheng Zhang Jiuxing Zhang Dongtao Yue Ming
Key words：Sm2Fe17Nx magnet; spark plasma sintering(SPS); decomposition dynamic; densification;
Abstract: High performance Sm2Fe17Nx magnetic powders were fabricated by ball-milling method and were compacted using spark plasma sintering(SPS) technique.Effects of processing conditions on the magnetic properties and decomposition dynamic of the magnets were investigated.It is found that higher sintering temperature improves the densification of the magnets, while deteriorates their magnetic properties simultaneously due to the decomposition of the Sm2Fe17Nx.Sintering at lower temperature can preserve the crystal structure of Sm2Fe17Nx compound, while the powders cannot be consolidated into a fully dense compact.An increased compressive pressure leads to better magnetic properties and higher density for the magnet at the same sintering temperature.
Ji Yongcheng1，Zhang Jiuxing1，Zhang Dongtao1，Yue Ming1
(1.Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology,Beijing 100022, China)
Abstract:High performance Sm2Fe17Nx magnetic powders were fabricated by ball-milling method and were compacted using spark plasma sintering(SPS) technique.Effects of processing conditions on the magnetic properties and decomposition dynamic of the magnets were investigated.It is found that higher sintering temperature improves the densification of the magnets, while deteriorates their magnetic properties simultaneously due to the decomposition of the Sm2Fe17Nx.Sintering at lower temperature can preserve the crystal structure of Sm2Fe17Nx compound, while the powders cannot be consolidated into a fully dense compact.An increased compressive pressure leads to better magnetic properties and higher density for the magnet at the same sintering temperature.
Key words:Sm2Fe17Nx magnet; spark plasma sintering(SPS); decomposition dynamic; densification;
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