Preparation and sintering of nano Fe coated Si3N4 composite powders

  • Rui-ming Yin (银锐明)
  • Jing-lian Fan (范景莲)Email author
  • Xun Liu (刘勋)


Fe/Si3N4 composite powder was synthesized by the heterogeneous precipitation-thermal reduction process, and then pressed into flakes under a pressure of 10 MPa. Flakes were sintered by pressureless and hot-pressing at 1 600 °C under 0.1 MPa N2. The chemical composition, phases and microstructure of composite powder and sintered flakes were investigated by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the structure of composite powders is Si3N4 coated by nano Fe. The crystal phases of sintered flakes by pressureless are Fe(Si) compound, SiC and Si3N4. The crystal phases of the sintered samples by hot-pressing are Fe, Fe(Si) compound and Si3N4. It is found that crystal phases flakes obtained by pressureless and hot-pressing are very different.

Key words

Fe Si3N4 coating heterogeneous precipitation sintering 


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Copyright information

© Central South University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Rui-ming Yin (银锐明)
    • 1
    • 2
  • Jing-lian Fan (范景莲)
    • 1
    Email author
  • Xun Liu (刘勋)
    • 1
  1. 1.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaChina
  2. 2.College of Packaging and Material EngineeringHunan University of TechnologyZhuzhouChina

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