Polymer-derived SiCN composites with magnetic properties
Atanu Saha, Sandeep R. Shah, Rishi Raj, Stephen E. Russek
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.
Journal of Materials Research
high temperature magnetic materials, magnetic nanocomposites, polymer-derived composites, SiCN