Presentation Information
[8p-PA3-5]A Critical Straight-Segment-Length Threshold for Drastic Thermal Conductivity Enhancement in CNT/Cu Composites
〇Akimasa Yuuki1, Kanau Sakoguchi2, Keiki Fukuda2, Hiroaki Koga1, Takeshi Hashishin1 (1.FAST, Kumamoto Univ., 2.GSST, Kumamoto Univ.)
Keywords:
CNT,Heat Conduction,Simulation
To clarify which CNT alignment states deteriorate the thermal performance of CNT/Cu composite thin films, a promising next-generation heat dissipation material for semiconductor devices, heat transfer simulations were conducted using the finite element method (FEM).The influences of CNT length, CNT curvature, alignment, intrinsic thermal conductivity, and CNT/Cu interfacial thermal conductance on the effective thermal conductivity of the composites were systematically investigated. The results demonstrated that the effective straight segment length (ESSL) of CNTs governs the transition between thermally decoupled and thermally coupled states. This transition results in a remarkable enhancement of the effective thermal conductivity of the composite.These findings provide useful guidelines for both fabrication process development and molecular dynamics simulations of CNT/Cu composite materials.