caa a22 4500 388022493 CHVBK 20180307124928.0 cr unu---uuuuu 161130e199808 xx s 000 0 eng 10.1557/JMR.1998.0317 doi S0884291400045532 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0317 A micromechanistic model of the combustion synthesis process: Influence of intrinsic kinetics [Elektronische Daten] A micromechanistic model of the combustion synthesis of NbC has been developed by combining the results of an experimental study of the intrinsic, pore-level kinetic mechanism [C. He. and G. C. Stangle, J. Mater. Res. 10, 2829-2841 (1995)] and a theoretical model developed previously [Y. Zhang and G. C. Stangle, J. Mater. Res. 9, 2592-2604 (1994); 9, 2605-2619 (1994)], in order to account for the various physical and chemical processes that take place during the combustion synthesis process. Results of the present investigation are interpreted from both a macroscopic and a microscopic point of view. Moreover, the relationship between the microscopic processes and macroscopic features of the combustion synthesis process is discussed. The results show that the formation of a combustion wave in the Nb-C system corresponded to establishment of a proper balance between the rates of enthalpy redistribution within the sample. Furthermore, the pore size had a significant influence on the combustion synthesis process: smaller pores gave rise to a higher area of contact between the reactants, which in turn gave rise to a higher rate of enthalpy increase due to the enhanced rate of product formation. The influence of the pore size distribution on the process is also discussed. Copyright © Materials Research Society 1998 He Cheng Institute for Aerospace Research, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada Blanchetiere Chantal Institute for National Measurement Standards, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada Stangle Gregory C. School of Ceramic Engineering and Sciences, New York State College of Ceramics at Alfred University, Alfred, New York 14802 Journal of Materials Research Cambridge University Press 13/8(1998-08), 2269-2280 0884-2914 13:8<2269 1998 13 JMR https://doi.org/10.1557/JMR.1998.0317 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0317 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- He Cheng Institute for Aerospace Research, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada NATIONALLICENCE 700 1- Blanchetiere Chantal Institute for National Measurement Standards, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada NATIONALLICENCE 700 1- Stangle Gregory C. School of Ceramic Engineering and Sciences, New York State College of Ceramics at Alfred University, Alfred, New York 14802 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/8(1998-08), 2269-2280 0884-2914 13:8<2269 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 388021136 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge