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Effect of Si Addition on Microstructure and Magnetic Properties of Permalloy Fabricated by Melt Drag Casting

용탕인출법으로 제조한 퍼말로이 박판의 Si 함량이 미세조직 및 자성특성에 미치는 영향

  • 임경묵 (포항공과대학교 신소재공학과) ;
  • 강주석 (포항공과대학교 신소재공학과) ;
  • 박찬경 (포항공과대학교 신소재공학과) ;
  • 남궁정 (포항산업과학연구원 신금속연구팀) ;
  • 김문철 (포항산업과학연구원 신금속연구팀)
  • Published : 2004.10.01

Abstract

Permalloys were successfully fabricated by melt drag casting in the present study, and their microstructure and consequent magnetic properties have been investigated as a function of Si content. In order to understand the relationship between magnetic properties and Si content, microstructure and texture were observed and phase analysis were performed by TEM. The effective permeability went through a maximum value at $2\%$ Si and then decreased with increasing Si content. Increasing Si content enlarged grain size, which resulted in improvement of permeability. However, over-added Si caused the formation of $Ni_3Fe$ order phase so that $5\%$ Si added permalloys had the smallest permeability.

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References

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