Effect of short carbon fibers on the thermal conductivities of Csf/AZ91D composites

Developing metal matrix composites with lightweight and high thermal conductivities (TCs) to realize high -efficiency thermal management is of great significance. Herein, a strategy for preparing short carbon fiber preform without any chemical binder through the application of vacuum filtration is proposed. High in -plane and nearly unaltered out-plane thermal conductive magnesium matrix composites with short carbon fibers have been prepared by the independently developed liquid-solid extrusion following the vacuum infiltration (LSEVI) technique. The in-plane TCs of the composites reaches 72.16 W center dot(m center dot K)-1, a 50.3% en-hancement compared to the matrix. The microstructures of the carbon fibers and magnesium matrix before and after the fabrication processing are characterized using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy (RS). The composites display attractive thermal properties and this work provides an efficient approach to prepare short fiber-related thermal conductive metal matrix composites with a refined thermal management capacity.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

A strategy for preparing short carbon fiber preform without any chemical binder through vacuum filtration is proposed. High in-plane and nearly unaltered out-plane thermal conductive magnesium matrix composites have been prepared using the liquid-solid extrusion following vacuum infiltration technique. The composites exhibit excellent thermal properties and provide an efficient approach to prepare short fiber-related thermal conductive metal matrix composites.