No 1, Vol. 5, 2003 
 

EFFECTS OF HEAT TREATMENT ON THE STRUCTURE OF THERMAL PLASMA SYNTHESIZED SiCN COMPOSITE NANOPOWDERS

R. Mach1, U. Letzig2, H. Goering1, F. Oleszak1, J. Friedrich1 and K. Richter2

1 Bundesanstalt für Materialforschung und -prüfung, D-12205 Berlin,
Unter den Eichen 87, Germany
2 Gesellschaft zur Förderung der naturwissenschaftlich-technischen
Forschung in Berlin Adlershof e.V., D-12489 Berlin, Volmerstraße 7B, Germany

Abstract

SiCN composite nanopowders with different chemical composition and characteristics were synthesized by the RF induction plasma at atmospheric pressure. Frequently the as-produced powders exhibit a high degree of chemical disorder or structural defects. Because the composition and the microstructure of starting powders have a great influence on the properties of composite ceramics, the changes of chemical composition, crystallization, and morphology of the as-produced powders during heat treatment up to 1500 °C were investigated in detail.

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