日本金属学会誌
Online ISSN : 1880-6880
Print ISSN : 0021-4876
ISSN-L : 0021-4876
Co-Al系新磁石合金「Malcolloy」の特性におよぼすW添加の影響について
増本 量小林 猛郎渡辺 清
著者情報
ジャーナル フリー

1967 年 31 巻 3 号 p. 254-258

詳細
抄録
Since the present investigators found a new magnet alloy “Malcolloy” of high coercivity in the system of cobalt and aluminium, they have carried out studies on the effect of additions of nickel, molybdenum, titanium, vanadium and chromium on its magnetic properties and obtained the highest coercive force of 1600 Oe. Further, they have investigated the effect of the addition of tungsten on the permanent magnet properties of Co-Al alloys and discovered that the addition of tungsten increases the coercive force of the binary alloys. The alloy which exhibits the highest coercivity has the composition of 75.89%Co, 13.55%Al and 10.56%W and shows the coercive force of 1450 Oe, the residual magnetic flux density of 3100 G and the maximum energy product of 1.40×106 G Oe when tempered at 525°C for 150 hours after water quenching from 1380°C. These alloys consist of many ferromagnetic elongated particles about 350 Å in diameter which are dispersed in the matrix of nearly non-magnetic β′ phase. Consequently, it may be concluded that the high coercivity of these alloys is mainly caused by the presence of the fine particles of a single magnetic domain.
著者関連情報
© 社団法人 日本金属学会
前の記事 次の記事
feedback
Top