Laser synthesis and crystallographic characterization of ultrafine SiC powders
- 31 January 1990
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 5 (1) , 143-150
- https://doi.org/10.1557/jmr.1990.0143
Abstract
High purity, ultrafine SiC powders have been produced from gas phase reactants (SiH4, C2H2) in a CO2 laser induced process. The flow reactor designed to operate with a medium power (10–50 W) continuous wave CO2 laser source is described. The mechanism of gas phase reactions involved has been investigated by means of on-line optical diagnostics. Powders produced have been characterized by means of conventional chemical and spectroscopic methods. The x-ray results point out a growth mechanism by coalescence; i.e., whole islands move in the flame to take part in binary collisions, analogously to that observed for particles produced by inert gas evaporation.Keywords
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