Gennari Silvia, Anselmi-Tamburini Umberto, Maglia Filippo, Spinolo Giorgio, Munir Zuhair A
INSTM, IENI/CNR, and Dipartimento di Chimica Fisica, Università di Pavia, Vle Taramelli, 27100 Pavia, Italy. silvia.gennari@ unipv.it
J Phys Chem B. 2006 Apr 13;110(14):7144-52. doi: 10.1021/jp0565249.
Interest in the mode of propagation of self-sustaining reactions has been motivated by the influence of the mode on the microstructure and composition of the final product. However, comprehensive studies relating the onset of the various propagation modes to the chemical and phase transformations taking place in the sample are still lacking. In the present work propagation instabilities in self-propagating high-temperature synthesis (SHS) of transition metal aluminides are studied using a computer simulation approach. The results are presented for the SHS of NiAl, CoAl, TiAl, and NbAl(3). Particular emphasis is made with respect to the influence of process variables and system parameters on the onset of propagation instabilities, in relation to the physicochemical processes taking place during the propagation of the combustion front.
自持反应传播模式受到关注，是因为该模式对最终产物的微观结构和成分有影响。然而，关于各种传播模式的起始与样品中发生的化学和相变之间关系的全面研究仍然缺乏。在本工作中，采用计算机模拟方法研究了过渡金属铝化物自蔓延高温合成（SHS）中的传播不稳定性。给出了NiAl、CoAl、TiAl和NbAl(3)的SHS结果。特别强调了过程变量和系统参数对传播不稳定性起始的影响，这与燃烧前沿传播过程中发生的物理化学过程有关。
