Co-Al系新磁石合金「Malcolloy」の特性におよぼすMn添加の影響について

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タイトル別名
  • The Effect of the Addition of Manganese on the Properties of New Magnet Alloy “Malcolloy” in the System of Cobalt and Aluminium
  • Co-Alケイ シン ジシャク ゴウキン Malcolloy ノ トクセイ ニ オヨボス Mn テンカ ノ エイキョウ ニ ツイテ
  • The Effect of the Addition of Manganese on the Properties of New Magnet Alloy “Malcolloy” in the System of Cobalt and Aluminium

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Since the discovery of a new magnet alloy “Malcolloy” having a high coercive force in the system of cobalt and aluminium, the present investigators have continued researches on the effect of additions of nickel, molybdenum, titanium, vanadium, chromium and tungsten on the properties of Malcolloy, the highest coercive force obtained in each system of alloys being 1450 to 1600 Oe. In this report the effect of manganese addition on the properties of Co-Al alloys was examined, with the result that the coercive force of the alloys decreases and the residual flux density increases gradually with increasing manganese content, and the maximum energy product shows the highest value in the alloy containing 84.59%Co, 12.81%Al and 2.60%Mn which exhibits a maximum energy product of 2.50×106 GOe, a residual flux density of 5900 G, and a coercive force 860 Oe, when tempered at 525°C for 20 hours after water-quenching from 1375°C. These alloys consist of many ferromagnetic elongated particles about 350 Å in mean diameter which are dispersed in the matrix of nearly non-magnetic β′ phase. Consequently, it is considered that the high coercivity of the alloy is mainly due to the presence of the fine particles of a single magnetic domain.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 31 (3), 259-263, 1967

    公益社団法人 日本金属学会

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