Abstract
Powders in the nanometric range (10–50 nm) are synthesized by laser driven reactions. Gaseous reactants are irradiated with a high power cw CO2 laser in a cross flow configuration. Size, crystallinity and chemical composition (SiC, Si3N4 and Si/C/N) are controlled through the choice of experimental conditions. At laboratory scale, a production rate up to 100 g/hr (SiC) is achieved, the experiment being stable for several hours. The powders are heat treated for annealing or sintering. The changes in the structure and morphology are investigated by various methods : BET, IR-spectroscopy, X-ray diffraction, TEM, 29Si MAS-NMR, XPS, EXAFS. The as-formed SiC powders appear as a mixture of fine β-SiC crystallites in an amorphous matrix which appears similar to the environment of an α-SiC polytype. The α/β ratio changes with synthesis conditions and with heating treatments. After pressureless sintering at 2050°C, SiC reaches 97% of the theoretical density.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
W. R. Cannon, S.C. Danforth, J.H. Flint, J.S. Haggerty, R.A. Marra (1982) ‘Sinterable ceramic powders from laser driven reactions, Part I ; Process description and modeling’, J. Am. Ceram. Soc., 65, 324.
M. Cauchetier, O. Croix, M. Luce ‘Laser synthesis of silicon carbide powders from silane and hydrocarbon mixtures’ (1988), Adv. Ceram. Mater., 3, 548.
M. Cauchetier, O. Croix, M. Luce, M.I. Baraton, T. Merle, P. Quintard ‘Nanometric Si/C/N Composite powders : Laser synthesis and IR characterization’ (1991) J. Eur. Ceram. Soc., 8, 215.
E. Borsella, L. Caneve, R. Fantoni, S. Piccirillo (1989), ‘Pulsed CO2 Laser-Driven Production of Ultrafine Silicon, Silicon carbide, Silicon nitride and Silicon oxynitride powders’ Il nuovo Cimento, 11, 487.
R. Alexandrescu, I. Morjan, E. Borsella, S. Botti, R. Fantoni, T. Dikonimos-Makris, R. Giorgi, S. Enzo (1991) ‘Composite ceramic powders obtained by laser induced reactions of silane and amines’ J. Mater. Res., 6, 2442.
M. Notaro, C. Casate, F. Curcio, M. Musci, Z. Dohcevic, ‘Laser synthesis and characterization of SiC, Si3N4 and Si/C/N ultrafine powders’ 8th Int. Symp. on Ceramics, Nov. 10–12 (1992), Rimini, Italy.
O. Croix, M. Gounot, P. Bergez, M. Luce, M. Cauchetier, Proc. 7tn world congress on high Technology Ceramics, Montecatini Terme, I (1991), Mater. Sci. Monogr., 66B, 1447 ‘Sintering of laser formed silicon carbide powders’.
R. Gilissen, J.P. Erauw, J. Schrivers, M. Cauchetier, M. Luce, N. Herlin, Int. Conf. on Hot Isostatic Pressing, Apr. 21–23 (1993), Antwerp, Belgium ‘Encapsulation HIPping of laser synthsized nanosize silicon carbide’.
A. Gheorghiu, C. Sénémaud, H. Roulet, G. Dufour, T. Moreno, S. Bodeur, C. Reynaud, M. Cauchetier, M. Luce, ‘Atomic configurations and local order in laser-synthesized Si, SiN, SiC and SiCN nanometric powders, as studied by X-ray-induced photoelectron spectroscopy and extended x-ray-absorption fine structure’ (1992) J. Appl. Phys, 71, 4118
P. Tougne, H. Hommel, A.P. Legrand, N. Herlin, M. Luce, M. Cauchetier, ‘Evolution of the structure of ultrafine SiC-laser formed powders with synthesis conditions’ (1993) Diamond and relat. mater., 2, 486.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Herlin, N. et al. (1994). Nanometric Si-Based Powders by Laser Driven Gas Phase Reactions. In: Hadjipanayis, G.C., Siegel, R.W. (eds) Nanophase Materials. NATO ASI Series, vol 260. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1076-1_12
Download citation
DOI: https://doi.org/10.1007/978-94-011-1076-1_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4469-1
Online ISBN: 978-94-011-1076-1
eBook Packages: Springer Book Archive