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Polymer-derived SiCN composites with magnetic properties

Published online by Cambridge University Press:  31 January 2011

Atanu Saha ,
Sandeep R. Shah ,
Rishi Raj  and
Stephen E. Russek
Atanu Saha
Affiliation:
Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309
Sandeep R. Shah
Affiliation:
Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309
Rishi Raj
Affiliation:
Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309
Stephen E. Russek
Affiliation:
National Institute of Standards and Technology, Boulder, Colorado 80305
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Abstract

Composites consisting of particles of α-iron dispersed in silicon carbonitride (SiCN) were fabricated by a polymer route. The composites had iron inclusions with the same magnetization as bulk iron, but they resisted oxidation up to 500°C and had a hardness of 5-7 GPa. The composites behaved as ferromagnets, albeit with a low susceptibility attributed to the pinning of the domains by imperfect interfaces and to the elastic resistance from the SiCN matrix. This low-cost, low-temperature processing method can be used to make different kinds of ceramic composites with multifunctional properties.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 18 , Issue 11 , November 2003 , pp. 2549 - 2551
Copyright
Copyright © Materials Research Society 2003

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References

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