A Study of Mn-Bi and Mn-Al Alloys as Permanent Magnet Materials

• Makino Noboru

  Faculty of Engineering, University of Tokyo, Tokyo, Japan, Tokyo Keiki Seizosho Co., Ltd.

• Suzuki Masaki

  Tokyo Keiki Seizosho Co., Ltd. (Tokyo Precision Equipiment Co., Ltd.)

抄録

Methods for preparing Mn-Bi and Mn-Al alloys and producing magnets from Mn-Bi alloys have been studied. A Mn-Bi alloy of high purity was prepared by sintering powders of Mn and Bi at 260°C for about 1000 hrs. Ferromagnetic Mn-Al alloys were prepared by quenching and tempering, and the influences of the temperatures of these treatments on the magnetic properties of the ferromagnetic Mn-Al alloy were studied in detail. To pulverize the Mn-Bi compound a hammer mill was used in an Argon atmosphere, and this gave good results. Mn-Bi magnets were produced by compressing power containing about 8% of resin at 200°C, and curing at 100°C. To obtain good magnetic properties, the magnetic field applied during compression should be 9,000 Oe or stronger. A magnet thus prepared has a Br of 2,500 to 3,800 gauss, and a _BB_C of 1,200 to 2,600 Oe. The thermal coefficient of remanence was about −1.23×10⁻³ gauss/°C.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 2 (4), 228-232, 1961

  社団法人 日本金属学会

キーワード

• General Engineering

詳細情報

• CRID: 1390282680095667968
• NII論文ID: 130003485707
• DOI: 10.2320/matertrans1960.2.228
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/2/4/2_4_228/_pdf
• 本文言語コード: en
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