The Behavior of Carbon on the Damping Characteristics of Fe-5.7% Al Alloy

Fe-5.7% Al 합금의 제진특성에 미치는 탄소의 거동

  • Lee, J.H. (Dept. of Metallurgy and Materials Eng., Kookmin Univ.) ;
  • Lee, M.J. (Dept. of Metallurgy and Materials Eng., Kookmin Univ.) ;
  • Lee, K.H. (Division of Metals, Korea Institute of Science and Technology) ;
  • Shin, M.C. (Division of Metals, Korea Institute of Science and Technology)
  • 이진형 (국민대학교 공과대학 금속재료공학과) ;
  • 이문종 (국민대학교 공과대학 금속재료공학과) ;
  • 이규환 (한국과학기술연구원 금속연구부) ;
  • 신명철 (한국과학기술연구원 금속연구부)
  • Received : 1995.04.10
  • Published : 1995.06.25

Abstract

Carbon and small amounts of alloying elements were added in Fe-5.7% Al ferromagnetic damping alloy. The specific damping capacities(SDC) of these alloys were investigated in relation to the grain size and the magnetic hysteresis loops. The behavior of carbon was analysed by XRD and EDS. These alloys showed characteristic damping nature of ferromagnetic damping materials. The alloying elements decreased SDC and especially the carbon was remarkable. The SDC was observed to be not related with the grain size but with the magnetic hysteresis loop area. The remarkable decrease of SDC by carbon addition was attributed to the locking migration of $90^{\circ}$ magnetic domain wall by the interstitial carbon in Fe-Al solid solution. However, the carbides also seems to decrease the SDC.

Keywords

Fe-Al base damping alloy;magnetomechanical damping;ferromagnetic damping

Acknowledgement

Supported by : 학술진흥재단