不感磁性Cr-Fe-4d遷移金属系3元インバー合金

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タイトル別名
  • Magnetically Insensitive Ternary Invar Alloys Cr, Fe and 4d Transition Metal
  • フカン ジセイ Cr Fe 4d センイ キンゾクケイ 3ゲン インバー ゴウ

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Invar alloys have wide applications of control devices and precision instruments such as bimetallic thermostats and standard scales. But the practical Invar alloys are all ferromagnetic and applications of these alloys are often restricted because of their ferromagnetism. Therefore, it is important to carry out research for development of magnetically insensitive Invar alloys.<BR>Since there is no remarkable crystal anisotropy in thermal expansion in cubic alloys, it is impossible to obtain magnetically insensitive Invar alloys by metallurgical methods. Thus, any attempt to obtain such an Invar alloy should be based on the anomalous volume change resulting from the appearance of antiferromagnetism.<BR>Cr is an antiferromagnetic metal and its physical properties around the Néel temperature such as thermal expansivity and electrical resistivity are drastically changed by the addition of solute atoms. The concentration dependence of the Néel temperature of Cr primary solid solution alloys containing a 4d transition metal or Fe indicates that the addition of Ru or Rh raises the Néel temperature, while the addition of Fe decreases it.<BR>Taking into consideration these effects on the Néel temperature, we discovered that some Cr-Fe base ternary alloys containing a 4d transition metal show magnetically insensitive Invar characteristics.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 39 (5), 484-488, 1975

    公益社団法人 日本金属学会

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