CNTs-TiC/Al梯度复合材料界面调控及封装应用中热稳定性研究

项目名称： CNTs-TiC/Al梯度复合材料界面调控及封装应用中热稳定性研究

项目编号： No.51501176

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 舒世立

作者单位： 中国科学院长春光学精密机械与物理研究所

项目金额： 20万元

中文摘要： 目前，CNTs/Al复合材料作为一种新型的结构、功能一体化材料受到了广泛关注，有望成为理想的热沉材料在封装中应用。然而，其热物理性能远未达到理想值, 主要原因是由于CNTs与Al润湿性差、界面结合不稳定。. 本项目为了改善CNTs与Al的润湿性和界面结构，将原位内生TiC颗粒引入CNTs/Al复合材料中，以CNTs-TiC/Al梯度复合材料为研究对象，围绕增强相与Al基体界面调控问题及界面结构与热物理性能之间的关系问题，深入研究CNTs与Al基体界面形成过程中的物理化学行为及动力学规律。建立组织与热物理性能之间的关系，并揭示出界面结构及梯度结构对热物理性能影响的作用机制。解决Al基复合材料作为热沉存在的热导率低、热膨胀系数与芯片不匹配问题，制备出高导热、热膨胀系数可控的CNTs-TiC/Al梯度复合材料热沉，为复合材料热沉从实验研究到实际应用奠定理论与技术基础。

中文关键词： 铝基复合材料；碳纳米管；界面调控；梯度复合材料；热物理性能

英文摘要： At present, the CNTs/Al composites are attracted extensively as a new kind of material with incorporation of structure and function, which are hopeful to become perfect heat sink materials used in package. However, the thermophysical properties of the CNTs/Al composites are far unreached to theory value. The main reason is due to the poor wettability and unstable interface structure between CNTs and Al matrix.. In this project, in order to improve the wettability and interface structure between CNTs and Al matrix，the in-situ TiC particles are introduced in to the CNTs/Al composites. The CNTs-TiC/Al gradient composites are taken as the research object, according to the problem of interface control between reinforcing phase and Al matrix and the problem of relationship between interface structure and thermophysical properties, the physics and chemistry behavior and its kinetic law between CNTs and Al during the process of interface formation will be deeply studied. The relationship between structures and thermophysical properties of the composites will be built. The action mechanism of the effect of the interface and gradient structures on the thermophysical properties of the CNTs-TiC/Al composites will be revealed. The aim is to resolve the problem of the low thermal conductivity and the mismatch thermal expansion coefficient to chip when Al matrix composites as conduction heat sink, and fabricate the CNTs-TiC/Al composite heat sink with high thermal conductivity and controllable thermal expansion coefficient. This study will lay a theory and technique foundation for composite heat sink from experimental study to practical application.

英文关键词： Al matrix composite;Carbon nano-tube;Interface control;gradient composite;Thermophysical properties