The combustion of pyrotechnic delay composition based on metallic fuel and perchlorate oxidizer involves complex reaction mechanisms and condensed phase heat release. Studies on the effect of aging on ignition/burning properties, and understanding of such multicomponent pyrotechnic delay mixtures are quite limited. The present work focuses on investigating the reaction kinetics, ignition, and combustion behavior of a zirconium/nickel (Zr/Ni)-alloy-based pyrotechnic delay mixture. Comparisons are presented between pristine and hygrothermally aged samples subjected to accelerated aging conditions under a constant temperature of 71°C and 95% relative humidity for 2 weeks. Activation energy versus reaction progress, ignition delay time as a function of maximum wire temperature, reaction zone temperature profile, and burning rate with respect to pressure are obtained from various experimental procedures. Results indicate that aging increases the ignition delay time and temperature rise time significantly, and a substantial decrement in the heat of reaction and burning rates along with incomplete combustion are evident.

基于金属燃料和高氯酸盐氧化剂的烟火延迟成分的燃烧涉及复杂的反应机理和凝结相的热量释放。关于老化对点火/燃烧特性的影响的研究以及对这种多组分烟火延迟混合物的理解是非常有限的。本工作着重于研究基于锆/镍（Zr / Ni）合金的烟火延迟混合物的反应动力学，着火和燃烧行为。比较了在71°C的恒定温度和95％的相对湿度下持续2周的加速老化条件下的原始和湿热老化样品之间的比较。活化能与反应进程，点火延迟时间与最大焊丝温度，反应区温度曲线的关系，相对于压力的燃烧速率和燃烧速率可通过各种实验程序获得。结果表明，老化显着增加了点火延迟时间和升温时间，并且明显降低了反应热和燃烧速率以及不完全燃烧。