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In-situ synthesis of Si3N4/TiN nanocomposite powders in cryogenic solution

Published online by Cambridge University Press:  01 February 2011

Mei Yang ,
Mingli Lü  and
Hongmin Zhu
Mei Yang
Affiliation:
hzhu@metall.ustb.edu.cn, University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, 30 Xueyuan Rd., Beijing, Beijing, 100083, People's Republic of China
Mingli Lü
Affiliation:
melody_y_ustb@sina.com, University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Beijing, 100083, People's Republic of China
Hongmin Zhu
Affiliation:
lvmingli223@sohu.com, University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Beijing, 100083, People's Republic of China
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Abstract

A new method of Si3N4/TiN nanocomposite powders through reaction at low temperatures was proposed and tested. The reduction of titanium chloride and silicon chloride by sodium was conducted in liquid ammonia at the temperature range of −40°C∼−50°C, and titanium nitride and silicon nitride nanopowders were obtained. Based on these reactions, in-situ coating and co-precipitation were conducted. The TiN nano-particles deposited on the surface of Si3N4 particles as the nuclei in the in-situ coating and in the co-precipitation two or more source of ions were reduced uniformly in the liquid ammonia. Si3N4/TiN nanocomposite powders were prepared by the both routes and were characterized with X-ray diffraction, transmission electron microscopy. The effects of in-situ and the particle size on the morphology of the composite were discussed.

Keywords

nanoscalepowdercomposite
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH11-29
Copyright
Copyright © Materials Research Society 2008

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References

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