SBIR Phase I: Low-Cost Hot Press Die Casting of Graphite-Metal Materials

小企业创新研究（SBIR）第一阶段项目将开发一种热压压铸技术，用于生产石墨金属材料。在提议的工作中，石墨预制体和金属将被放置在一个多室石墨模具中，并加载到热压机上。将模具取出并加热到所需的熔体温度后，将含有石墨预制件和熔融金属的模具在规定的压力和温度下保持一段时间，直到石墨表面发生完全的碳化物反应并使零件致密化。随后，石墨金属部件的铸态微观结构和热性能将作为各种工艺变量（包括时间、温度和压力）的函数进行评估。提出的铸造技术将允许制造具有成本效益的石墨金属材料，提供改善的热性能，这对于实现高功率电子封装应用的热管理解决方案至关重要。此外，这种铸造技术将使铸造石墨金属材料的成本降低高达40%。

The Small Business Innovation Research (SBIR) Phase I project will develop a hot press die casting technology to be used in the production of graphite-metal materials. In the proposed work, graphite preform and metal will be placed in a multi-chamber graphite die set and loaded into a hot press. Following evacuation of the die set and heating to the desired melt temperature, the die set mold with graphite preform and molten metal will be held under presuure and temperature for a specified period of time till complete graphite surface carbide reaction and densification of the part occur. The as-cast microstructure and thermal properties of the graphite-metal part will be subsequently evaluated as a function of various process variables including time, temperature and pressure. The proposed casting technology will allow the manufacture of cost-effective graphite-metal materials that offer improved thermal properties crititcal to enabling thermal management solutions for high power electronics packaging applications. In addition, this casting technology will result in a cost reduction for cast graphite-metal materials of up to 40%.