Heat Transfer in Advanced Spray Processing of Metal Matrix Composites

摘要：CTS-9224850 Lavernia金属基复合材料（MMCs）具有将延展性、韧性和耐环境性能与高强度、高模量的增强性能相结合的潜力。金属基复合材料所具有的具有吸引力的物理和机械性能已经被许多研究者所证实。正如本提案所展示的那样，尽管有令人鼓舞的初步结果，但我们对控制陶瓷相和金属相之间相互作用的热机制的理解仍然非常有限。特别是，陶瓷颗粒分布的高能共注入到部分凝固的金属喷雾中，以及它在雾化过程和随后的沉积过程中对传热的影响，目前还没有得到很好的理解。本论文的目的是系统地研究陶瓷颗粒对金属基复合材料喷射共沉积过程中微观结构演变的热效应。

ABSTRACT---CTS-9224850 Lavernia Metal matrix composites (MMCs) have the potential combining metallic properties of ductility, toughness, and environmental resistance with reinforcement properties of high strength and high modules. The attractive physical and mechanical properties that can be obtained with metal matrix composites have been documented by numerous investigators. As will be demonstrated in this proposal, despite encouraging preliminary results, our understandings of the thermal mechanisms that govern the interactions between the ceramic and metallic phases remain very limited. In particular, the effects associated with the energetic co-injection of a distribution of ceramic particulates into a partially solidified metallic spray, and its ensuing effects on the heat transfer during atomization and subsequently during deposition are not well understood. The objective of the present proposal is to outline a research program to systematically investigate the thermal effects of ceramic particulates on the evolution of microstructure during spray co-deposition of metal matrix composites.