Thermal Expansion and Magnetic Properties of Fe-Pd Invar Alloys Containing Carbon

  • K. Fukamichi
  • M. Kikuchi
  • T. Nakayama


In order to study the thermal expansion characteristics and the magnetic properties of Fe-Pd Invar alloys, the γ-phase was stabilized by addition of carbon. Since the carbon addition makes cold working easy, the effect of cold working on the thermal expansion characteristics was also investigated. The Curie temperature and the saturation magnetization were almost independent of the carbon content. The thermal expansion anomaly below the Curie temperature became more remarkable by addition of carbon, and it was significantly pronounced by cold working, as indicated by a negative thermal expansion in a wide temperature range. It was found from the thermal expansion hysteresis curves that the γ-phase of the alloys containing carbon is more stable than that of Fe70Pd30 binary alloy. The linear magnetostriction at room temperature showed a large positive value by quenching or addition of carbon. The ΔE effect became small by addition of carbon in the quenched state.


Thermal Expansion Cold Working Curie Temperature Saturation Magnetization Invar Effect 
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Copyright information

© Purdue Research Foundation 1982

Authors and Affiliations

  • K. Fukamichi
    • 1
  • M. Kikuchi
    • 1
    • 2
  • T. Nakayama
    • 1
    • 2
  1. 1.The Research Institute for Iron, Steel and Other MetalsTohoku UniversitySendai, 980Japan
  2. 2.The Research Institute of Electric and Magnetic AlloysSendai, 982Japan

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