52.5Fe-11Al-18Ni-12.5Co-6Cu焼結磁石の焼結について

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タイトル別名
  • On the Sintering of 52.5Fe-11Al-18Ni-12.5Co-6Cu System. (Study on Sintered Fe-Al-Ni System Magnet. (3))
  • 52.5Fe-11Al-18Ni 12.5Co-6Cu ショウケツ ジシャク ノ ショウケツ ニ ツイテ

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In the former report, a sintering process and successful results of the experiments to produce sintered Fe-Al-Ni magnet of superior magnetic properties have been reported. The sintering of 12.5%Co, 18%Ni, 11%Al, 6%Cu, bal. Fe system magnet is discussed in this paper from the experimental stand-points, i.e., the dependence of various properties (density, densification parameter, saturate induction, the product, residual induction times coercieve force, rupture strength and pore size distribution) upon the sintering conditions has been investigated. The experimental results obtained are summarized as follows: (1) The process of sintering of Fe-Al-Ni-Co-Cu system was essentially the same as the process of sintering of Fe-Al-Ni system, but the densification rate of specimens has been accelerated by addition of Co and Cu powders. (2) At the sintering temperature of 1100°, a slight pore shrinkage and densification has been found whereas adhesion of powder particles have been promoted very gradually with the time of sintering. (3) When the sintering temperature reached to 1200° a rapid shrinkage of pores has been observed during the earlier stage of sintering, up to 90 minutes. (4) At the higher sintering temperature of 1300° or 1350° the densification and shrinkage of pores were nearly completed in 30 min and was followed by alloying of components which proceeded very rapidly. (5) The effect of sintering temperature upon the various properties (i.e., density, densification parameter, magnetic property) of the magnet was larger than that of sintering time.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (6), 315-318, 1959

    公益社団法人 日本金属学会

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