Metal-based composite material device based on gas-liquid phase change and preparation method of metal-based composite material device

A composite material and metal-based technology, which is applied in the direction of electrical components, electrical equipment structural parts, and modification using liquid cooling, etc., can solve the difficulty of integrating low-expansion heat source materials, excessive differences in thermal expansion coefficients, and insufficient miniaturization of devices, etc. problems, achieve the effects of reducing thermal mismatch rate, controllable thermal expansion, and improving thermal conductivity

Active Publication Date: 2020-03-31
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there are many major problems in the material and structure of traditional gas-liquid phase change heat dissipation devices, mainly in the insufficient miniaturization of the device (in order to deal with the pressure difference formed by the phase change medium during the evaporation process, the wall thickness is often required to be too large); and It is difficult to integrate low-expansion heat source materials (the difference in thermal expansion coefficient is too large)

Method used

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  • Metal-based composite material device based on gas-liquid phase change and preparation method of metal-based composite material device
  • Metal-based composite material device based on gas-liquid phase change and preparation method of metal-based composite material device
  • Metal-based composite material device based on gas-liquid phase change and preparation method of metal-based composite material device

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preparation example Construction

[0052] In another technical solution of the present invention, a method for preparing a metal matrix composite device based on gas-liquid phase transition is provided, including the following steps:

[0053] (1) prepare respectively the upper shell and the lower shell that can form the metal tubular shell;

[0054] (2) Plating a thin metal layer on the inner wall of the upper shell and the lower shell;

[0055] (3) using a positioning mold to place the porous medium axially between the upper shell and the lower shell, and sintering to form a porous medium layer;

[0056] (4) modifying the porous medium layer so that its surface can adhere to a liquid working medium;

[0057] (5) The upper shell and the lower shell are sealed and packaged to form a metal tube shell, and at the same time, a liquid filling port and a heat source device are installed on one end of the metal tube shell to obtain a heat dissipation device.

[0058] For the specific working principle of the metal m...

Embodiment 1

[0062] A metal matrix composite device based on gas-liquid phase change heat transfer, its structure please refer to Figure 1-Figure 3 , Figure 5 etc., its preparation method is as follows:

[0063] Step 1, shell forming: the upper shell and the lower shell are prepared on the metal matrix composite plate (WCu20) by machining.

[0064] Step 2, cleaning the surface of the composite material: firstly remove impurities such as organic matter on the surface of the metal matrix composite material shell; then use cathodic degreasing to further remove the grease on the surface; then remove the tungsten oxide on the surface, and then use dilute sulfuric acid to remove the surface Copper oxide; Finally, rinse the surface with deionized water two to three times to remove the residual dilute sulfuric acid solution on the surface and dry it.

[0065] Step 3, coating the surface of the composite material with a metal layer: using a chemical or physical method to coat a thin metal layer...

Embodiment 2

[0077] The metal matrix composite material device based on gas-liquid phase change heat transfer in this embodiment has the characteristics of controllable thermal expansion rate from the metal matrix composite material, and the metal matrix composite material plate with controllable expansion rate is processed into different lengths, widths, The shell of thickness, all the other are with embodiment 1.

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Abstract

The invention relates to a metal-based composite material device based on gas-liquid phase change and a preparation method thereof. The composite material device comprises a metal tube shell forming aclosed cavity, and a porous medium layer arranged in the middle of the metal tube shell and soaked with a liquid working medium, wherein the porous medium layer is arranged in the metal tube shell, the liquid filling port is arranged at one end outside the metal tube shell and connected with the porous medium layer, a heat source device can be arranged at the other end outside the metal tube shell, the liquid working medium can generate gas-liquid phase change after being heated, and the porous medium layer divides a closed cavity of the metal tube shell into two steam channels. Compared withthe prior art, the invention effectively solves the problem that the traditional single metal or ceramic heat dissipation material is difficult to consider the requirements of high thermal conductivity, controllable thermal expansion coefficient and high comprehensive mechanical properties at the same time, and provides a new direction for the development of high-power density devices.

Description

technical field [0001] The invention belongs to the technical field of electronic device cooling equipment, and relates to a metal matrix composite material device based on gas-liquid phase transition and a preparation method thereof. Background technique [0002] Advanced electronic devices based on third-generation semiconductor materials are of great value in many fields of national economy and people's livelihood and major national strategic security. With the continuous improvement of the functionality, integration, and power density of electronic devices, the original heat dissipation architecture that utilizes the high thermal conductivity of metal itself has been difficult to solve the heat dissipation problem of high power density heat sources. [0003] In contrast, the gas-liquid phase change technology is based on the efficient heat absorption, heat transfer, and heat release characteristics of the phase change medium during the evaporation-transmission-condensati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K7/20
CPCH05K7/20381H05K7/2029H05K7/20309H05K7/20318
Inventor 付本威邓涛郑飞宇储奔程为铮怀雷陶鹏宋成轶尚文
Owner SHANGHAI JIAO TONG UNIV
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