Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Evaluation of the Reactivity of Bulk Nano Ni/Al Powder Manufactured by Shock Compaction Process

충격압분공정으로 제조된 나노 니켈/알루미늄 혼합분말재의 특성 평가

  • 김우열 (포항공과대학교(POSTECH) 신소재공학과) ;
  • 안동현 (한국원자력연구원) ;
  • 박이주 (국방과학연구소) ;
  • 김형섭 (포항공과대학교(POSTECH) 신소재공학과)
  • Received : 2017.05.15
  • Accepted : 2017.05.24
  • Published : 2017.08.01
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Abstract

Recently, interest in multifunctional energetic structural materials (MESMs) has grown due to their multifunctional potential, especially in military applications. However, there are few studies about extrinsic factors that govern the reactivity of MESMs. In this paper, a shock compaction process was performed on the nano Ni/Al-mixed powder to investigate the effect of particle size on the shock reaction condition. Additionally, heating the statically compacted specimen was also performed to compare the mechanical properties and microstructure between reacted and unreacted material. The results show that the agglomerated structure of nanopowders interrupts the reaction by reducing the elemental boundary. X-ray diffraction analysis shows that the NiAl and $Ni_3Al$ intermetallics are formed on the reacted specimen. The microhardness results show that the $Ni_3Al$ phase has a higher hardness than NiAl, but the portion of $Ni_3Al$ in the reacted specimen is minor. In conclusion, using Ni/Al composites as a reactive material should focus on energetic use.

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References

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