Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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The Phase Analysis of MgB2 Fabricated by Spark Plasma Sintering after Ball Milling

볼 밀링 후 방전플라즈마 소결법에 의해 제조된 MgB2의 상 분석

  • Kang, Deuk-Kyun (School of nano and advanced Materials Engineering, I-Cube Center, ReCAPT & K-MEM R&D cluster, Gyeongsang National University) ;
  • Choi, Sung-Hyun (School of nano and advanced Materials Engineering, I-Cube Center, ReCAPT & K-MEM R&D cluster, Gyeongsang National University) ;
  • Ahn, In-Shup (School of nano and advanced Materials Engineering, I-Cube Center, ReCAPT & K-MEM R&D cluster, Gyeongsang National University)
  • 강득균 (경상대학교 나노.신소재공학부, I-Cube Center, ReCAPT & K-MEM R&D cluster) ;
  • 최성현 (경상대학교 나노.신소재공학부, I-Cube Center, ReCAPT & K-MEM R&D cluster) ;
  • 안인섭 (경상대학교 나노.신소재공학부, I-Cube Center, ReCAPT & K-MEM R&D cluster)
  • Published : 2008.10.28
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Abstract

This paper deals with the phase analysis of $MgB_2$ bulk using spark plasma sintering process after ball milling. Mg and amorphous B powders were used as raw materials, and milled by planetary-mill for 9 hours at argon atmosphere. In order to confirm formation of $MgB_2$ phase, DTA and XRD were used. The milled powders were fabricated to $MgB_2$ bulk at the various temperatures by Spark Plasma Sintering. The fabricated $MgB_2$ bulk was evaluated with XRD, EDS, FE-SEM and PPMS. In the DTA result, reaction on formation of $MgB_2$ phase started at $340^{\circ}C$. This means that ball milling process improves reactivity on formation of $MgB_2$ phase. The $MgB_2$ MgO and FeB phases were characterized from XRD result. MgO and FeB were undesirable phases which affect formation of $MgB_2$ phase, and it's distribution could be confirmed from EDS mapping result. Spark Plasma Sintered sample for 5 min at $700^{\circ}C$ was relatively densified and it's density and transition temperature showing super conducting property were $1.87\;g/cm^3$ and 21K.

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References

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