Mechanisms of reaction wave propagation during combustion synthesis of advanced materials

被引：38
|
作者：
Mukasyan, AS [1 ]
Rogachev, AS [1 ]
Varma, A [1 ]
机构：
[1] Univ Notre Dame, Dept Chem Engn, Notre Dame, IN 46556 USA
来源：
CHEMICAL ENGINEERING SCIENCE | 1999年 / 54卷 / 15-16期
基金：
美国国家科学基金会;
关键词：
combustion; heat transfer; kinetics; heterogeneous media; reaction mechanism; combustion synthesis;
D O I：
10.1016/S0009-2509(98)00457-6
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Using a digital high-speed microscopic video recording technique developed in our laboratory, we have investigated high-temperature combustion synthesis waves in the Ni + Al system. Based on the results obtained, we identify characteristic features of rapid high-temperature reaction wave propagation in heterogeneous media. It is shown that, while at time scales similar to 10(-1)s the reaction wave propagation appears to be steady, at time scales similar to 10(-3) s it exhibits features of hesitations followed by jumps, and at even faster time scales similar to 10(-4) s is shown to follow a novel scintillating reaction wave mechanism. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：3357 / 3367
页数：11
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