caa a22 4500 388021136 CHVBK 20180307124924.0 cr unu---uuuuu 161130e199801 xx s 000 0 eng 10.1557/JMR.1998.0020 doi S0884291400042576 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0020 A micromechanistic model of the combustion synthesis process: Mechanism of ignition [Elektronische Daten] A micromechanistic model of the combustion synthesis has been extended to study the detailed mechanism and influential parameters of a combustion synthesis process, as well as the development of ignition criteria in the Nb-C system. The case of constant heat-flux ignition conditions has been used to illustrate the details of the ignition process, in order to elucidate the various physical and chemical processes that take place during the initial stages of the combustion synthesis process; however, the results of this study can be generally extended to the other modes of the ignition process. The results showed that the ignition criteria for the Nb-C system corresponded to the establishment of a proper balance between the rates of enthalpy redistribution within the sample, and to the establishment of a kind of positive feedback loop during the ignition process that is necessary for self-propagation to occur. If the heat supplied from an external source to initiate the combustion synthesis process is less than a certain critical value, the combustion wave stops at a certain short distance from the ignition surface. Otherwise, the reaction proceeds in a self-propagating manner. Copyright © Materials Research Society 1998 He Cheng School of Ceramic Engineering and Sciences, New York State College of Ceramics at Alfred University, Alfred, New York 14802 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 13/1(1998-01), 146-155 0884-2914 13:1<146 1998 13 JMR https://doi.org/10.1557/JMR.1998.0020 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0020 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- He Cheng School of Ceramic Engineering and Sciences, New York State College of Ceramics at Alfred University, Alfred, New York 14802 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 13/1(1998-01), 146-155 0884-2914 13:1<146 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 388021136 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge