多元系混合粉の焼結過程および焼結機構  MA粉末をパルス通電焼結したFe52Cr48合金の特性

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タイトル別名
  • Property of Fe52Cr48 Alloy Prepared by Spark Plasma Sintering of Mechanical Alloyed Powder.
  • MA フンマツ オ パルス ツウデン ショウケツシタ Fe52Cr48 ゴウキ

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抄録

Fe52Cr48+5mass%X(X=Si, C) were synthesized by mechanical alloying (MA) of the elemental powders of Fe, Cr and Si/C using a planetary ball milling for 180ks under 1.33kPa argon gas atomosphere. These MA powders were consolidated by spark plasma sintering (SPS) process.<BR>The X-ray diffraction patterns of mechanical alloyed Fe52Cr48+5mass%Si and Fe52Cr48+5mass%C powders were almost similar with that of mechanical alloyed Fe52Cr48 powder. The σ-phase was obtained by only SPS of Fe52Cr48+5mass%Si. In this MA-SPS process, Fe52Cr48 alloy without σ-phase was synthesized and formed because of the few Si contamination in this process. The sintered Fe52Cr48 alloy without σ-phase had a coefficient of thermal expansion lower than that of SUS304 stainless steel.

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