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

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  • The Influence of the Addition of Titanium on the Magnetic Characteristics of New Magnet Alloys “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 Ti テンカ ノ エイキョウ ニ ツイテ
  • The Influence of the Addition of Titanium on the Magnetic Characteristics of New Magnet Alloys “Malcolloy” in the System of Cobalt and Aluminum

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The present investigators previously found a new magnet alloy “Malcolloy” having a high coercive force in the system of cobalt and aluminum and then conducted studies on the influence of the addition of nickel and molybdenum on their magnetic properties, the highest coercive force obtained being 1600 Oe.<BR>They have now investigated the influence of the addition of titanium on magnetic properties of Co-Al alloys and have found that the coercive force is increased generally by the addition of titanium. Thus, an alloy with the composition of 80.53%Co, 14.84%Al and 4.63%Ti showing a coercive force of 1550 Oe, a residual magnetic flux density of 2850 G, and a maximum energy product of 1.40×106 G·Oe, when tempered at 550°C for 20 hours after water-quenching from 1365°C.<BR>These alloys consist of many elongated-small particles of a ferromagnetic phase dispersed in the matrix of non-magnetic one. Consequently it may be concluded that the in high coercivity is mainly caused by the existence of small particles, each of which is composed of a single magnetic domain.

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  • 日本金属学会誌

    日本金属学会誌 29 (3), 222-227, 1965

    公益社団法人 日本金属学会

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