The Thermal Characteristics of Combustion Waves in Self- Sustaining Reactions

研究自蔓延高温合成(固体燃烧)的动机在很大程度上是基于材料的考虑，但许多悬而未决的问题都直接或间接地与传热和传质问题有关。与温度有关的波动特性部分取决于反应物和燃烧产物的导热系数、扩散系数和比热。这项研究将与苏联切尔诺戈洛夫卡结构宏观动力学研究所合作进行，包括三项实验活动：熔化对难熔金属碳化物燃烧合成的影响的研究，氮化物过滤燃烧合成中不均匀燃烧前沿的研究，以及研究燃烧波在成分梯度中的传播。为了深入了解直接燃烧合成的机理，需要进行基础研究。这一过程表面上的复杂性只让美国产业界对这项技术的未来抱有保留的乐观情绪。在美苏基础科学研究领域合作计划的指导下，与苏联协调的研究工作将通过研究不断变化的温度波来更好地了解合成反应中的燃烧过程。

The motivation for research on self-propagating high temperature synthesis (solid combustion) has been largely based upon materials considerations, but many of the unresolved problems are directly or indirectly related to heat and mass transfer issues. Temperature-related wave characteristics are governed, in part, by the thermal conductivity, diffusivity, and specific heat of the reactants and products of combustion. The research, which is to be performed cooperatively with the Institute of Structural Macrokinetics in Chernogolovka, USSR, consists of three experimental activities: investigations of the effect of melting on combustion synthesis of refractory metal carbides, investigations of nonuniform combustion fronts in the filtration combustion synthesis of nitrides, and investigation of the propagation of combustion waves through compositional gradients. Fundamental studies are needed to provide a thorough understanding of the mechanisms of direct combustion synthesis. The apparent complexity of the process has generated only a reserved optimism on the future of the technique with US industry. A research effort coordinated with the Soviet Union, under the guidelines of the US-USSR Cooperation in the Field of Basic Scientific Research Program, will lead to a higher likelihood of understanding the combustion process in synthesis reactions through investigations of the evolving temperature wave.