Supersoft magnets made from nanoscale dispersions of Fe-Co in a ceramic matrix

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Supersoft magnets made from nanoscale dispersions
of Fe-Co in a ceramic matrix

• Masood Hashemi
• Prof. Rishi Raj
• Dr. Atanu Saha
• Department of Mechanical Engineering
• University of Colorado at Boulder
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  Research Project Presentation,
  October 15, 2004(P1/4)

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Backgrounds

• Magnetic Properties
• Susceptibility, Ferromagnetic, Soft-Hard
  Magnets
• Hysteresis Curve
• Ostwald ripening
• Many small crystals form in a system
  initially but slowly disappear except for a few
  that grow larger, at the expense of the small
  crystals.
• Polymer-derived Ceramics
• In this process an organic liquid
  precursor is crosslinked and pyrolyzed to produce
  the ceramic matrix.

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Research approach and Techniques

• Making Fine Powder (Powder Metallurgy)
• Reduce the amount of Carbon
• Oxides reduction with Hydrogen
• Powder mixing with liquid Polymer
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  Research Project
  Presentation, October 15, 2004(P3/4)

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Heat treatment of polymerMaterials
testing-Magnetic Properties with magnetic
atomic spectroscopy in NIST-XRD and SEM-Hot
Consolidation and Microhardness testing
Research Project
Presentation, October 15, 2004(P4/4)