Co-Al系新磁石合金「Malcolloy」の特性に及ぼすNi添加の影響について

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  • Influence of the Addition of Nickel on the Properties of a New Magnet Alloy “Malcolloy” in the System of Cobalt and Aluminum
  • 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 Ni テンカ ノ エイキョウ ニ ツイテ
  • Influence of the Addition of Nickel on the Properties of a New Magnet Alloy “Malcolloy” in the System of Cobalt and Aluminum

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The present investigators already measured the magnetic properties of cobalt-rich Co-Al alloys, and found a new magnet alloy “Malcolloy” three years ago, which has a high coercive force of 1,200 Oe. So they further have investigated the influence of the addition of nickel on their properties, and have found that the coercive force of Co-Al alloys has been increased generally by the addition of nickel: an alloy with the content of 65.46%Co, 14.74%Al and 19.80%Ni shows a coercive force of 1,500 Oe, a residual magnetic flux density of 3,200G and a maximum energy product of 1.45×106 G·Oe when tempered at 525°C for 15 hours after water-quenching from 1370°C and is forgeable at high temperatures. These alloys consist of many ferromagnetic elongated particles about 200∼1000Å in mean diameter dispersed in the matrix of non-magnetic β phase. Consequently it may be concluded that the high coercivity of these alloys is mainly caused by the existence of the small particles, each of them being composed of a single magnetic domain.

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  • 日本金属学会誌

    日本金属学会誌 28 (7), 390-396, 1964

    公益社団法人 日本金属学会

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