Fe-3 mass%Si焼結合金の磁気的性質と組織

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タイトル別名
  • Magnetic Properties and Structure of Fe-3 mass%Si Sintered Alloy
  • Fe 3 massパーセント Si ショウケツ ゴウキン ノ ジキテキ セイシ

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The relationship between magnetic properties and structure of Fe-3 mass%Si alloy sintered at various temperatures has been studied. Electrolytic iron powder and Fe-17 mass%Si master-alloy powder were used as the material powder. The compacted Fe-3 mass%Si specimens were sintered over the temperature range between 1173 and 1673 K. Magnetic hysteresis loop, induction at 800 AT/m (B8), maximum permeability (μm) and coercive force (Hc) were measured using a recording fluxmeter, and core loss (W5⁄50) was measured at frequency of 50 Hz and maximum induction of 0.5 T. Structure was examined using an electron probe microanalyzer.<BR>The results are summarized as follows:<BR>(1) The sintered alloy shows a hysteresis loop suitable for block-shape magnetic cores at the sintering temperature range between 1473 and 1673 K. At this temperature range, B8 increases from 1.22 T to 1.41 T and μm increases from 9×10−3 H/m to 1.5×10−2 H/m linearly with the density of the sintered alloy. On the other hand, Hc decreases from 84 AT/m to 48 AT/m linearly with the density. In this case, round pores are formed in the sintered alloy.<BR>(2) W5⁄50 is improved at sintering temperatures higher than 1473 K and is almost constant (25.0 W/kg) at sintering temperatures up to 1673 K.<BR>(3) Grain growth of the sintered alloy does not affect the coercive force contrary to expectation, since intermetallic inclusions are formed in the sintered alloy.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 52 (4), 434-439, 1988

    公益社団法人 日本金属学会

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