Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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A Precipitation Behavior of Nano-Oxide Particles in Mechanically Alloyed Fe-5Y2O3 Powders

기계적 합금화하여 제조한 Fe-5Y2O3 합금분말의 나노산화물 석출거동

  • Kim, Ga Eon (Development of Materials Science and Engineering, Hanyang University) ;
  • Noh, Sanghoon (Nuclear Materials Development Division, Korea Atomic Energy Research Institute) ;
  • Choi, Ji Eun (Nuclear Materials Development Division, Korea Atomic Energy Research Institute) ;
  • Kim, Young Do (Development of Materials Science and Engineering, Hanyang University) ;
  • Kim, Tae Kyu (Nuclear Materials Development Division, Korea Atomic Energy Research Institute)
  • 김가언 (한양대학교 신소재공학과) ;
  • 노상훈 (한국원자력연구원 원자력소재개발부) ;
  • 최지은 (한국원자력연구원 원자력소재개발부) ;
  • 김영도 (한양대학교 신소재공학과) ;
  • 김태규 (한국원자력연구원 원자력소재개발부)
  • Received : 2015.02.11
  • Accepted : 2015.02.25
  • Published : 2015.02.28
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Abstract

A precipitation behavior of nano-oxide particle in Fe-$5Y_2O_3$ alloy powders is studied. The mechanically alloyed Fe-$5Y_2O_3$ powders are pressed at $750^{\circ}C$ for 1h, $850^{\circ}C$ for 1h and $1150^{\circ}C$ for 1h, respectively. The results of Xray diffraction pattern analysis indicate that the $Y_2O_3$ diffraction peak disappear after mechanically alloying process, but $Y_2O_3$ and $YFe_2O_4$ complex oxide precipitates peak are observed in the powders pressed at $1150^{\circ}C$. The differential scanning calorimetry study results reveal that the formation of precipitates occur at around $1054^{\circ}C$. Based on the transmission electron microscopy analysis result, the oxide particles with a composition of Y-Fe-O are found in the Fe-$5Y_2O_3$ alloy powders pressed at 1150oC. It is thus conclude that the mechanically alloyed Fe-$5Y_2O_3$ powders have no precipitates and the oxide particles in the powders are formed by a high temperature heat-treatment.

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References

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