Aluminum-graphite aluminum composite material structure capable of enhancing longitudinal heat conductivity coefficient

Abstract

The invention provides an aluminum-graphite-aluminum composite material structure capable of enhancing a longitudinal heat conductivity coefficient, and belongs to the technical field of composite materials. The composite material structure comprises an upper aluminum coating layer, a composite graphite aluminum functional layer and a lower aluminum coating layer which are fused together by adopting a metallurgical method, the composite graphite aluminum functional layer comprises a graphite aluminum layer and a plurality of heat conduction columns embedded in the graphite aluminum layer, andthe material of the heat conduction columns is consistent with the material of the upper aluminum coating layer and the material of the lower aluminum coating layer. According to the aluminum-graphite-aluminum composite material structure, the longitudinal heat conductivity coefficient of the graphite aluminum is greatly improved by adding the heat conduction columns in the graphite aluminum layer, and compared with an existing common graphite aluminum material, the transverse heat conductivity coefficient of the aluminum-graphite-aluminum composite material structure with the enhanced longitudinal heat conductivity coefficient is basically consistent with that of the graphite aluminum; the longitudinal heat conductivity coefficient is greatly improved, and the application boundary of thegraphite aluminum in the thermal design of electronic equipment can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to an aluminum-graphite-aluminum composite material structure with enhanced longitudinal thermal conductivity. Background technique [0002] With the improvement of electronic functions and performance, the heat dissipation problem of electronic equipment is becoming more and more prominent. The traditional ordinary aluminum alloy as the base material of the electronic device box can no longer meet the heat conduction requirements of high heat consumption electronic equipment. The limited heat conduction of aluminum alloy Capacity has become the bottleneck of electronic equipment heat dissipation technology. In view of the lack of thermal conductivity of ordinary aluminum alloys, more and more new materials with high thermal conductivity have emerged, and graphite aluminum is one of the new materials with very good performance. [0003] Graphite aluminum is a composite ...

AI Technical Summary

Problems solved by technology

Macroscopically, the thermal conductivity of graphite aluminum in the horizontal direction can be as high as 700-1000w / m·k, but the thermal conductivity in the longitudinal direction is only 30-50w / m·k, which is far lower than that of ordinary aluminum alloys along the three spatial directions. Thermal conductivity 120~180w / m·k

For application scenarios that require longitudinal heat conduction, the application of graphite aluminum will be severely restricted

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