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A kind of metal matrix composite material device based on gas-liquid phase transition and preparation method thereof

A composite material, metal-based technology, applied in electrical components, electrical equipment structural parts, modification with liquid cooling, etc., can solve the difficulty of integrating low-expansion heat source materials, the difference of thermal expansion coefficient is too large, the degree of miniaturization of devices is insufficient, etc. problems, to achieve excellent anti-gravity operating characteristics, ultra-thin shell thickness, and improve equipment reliability and life.

Active Publication Date: 2022-08-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • A kind of metal matrix composite material device based on gas-liquid phase transition and preparation method thereof
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  • A kind of metal matrix composite material device based on gas-liquid phase transition and preparation method thereof

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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, comprising the following steps:

[0053] (1) Prepare the upper shell and the lower shell which can form the metal tube shell respectively;

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

[0055] (3) Using a positioning mold to place the porous medium between the upper casing and the lower casing along the axial direction, and sintering to form a porous medium layer;

[0056] (4) modifying the porous medium layer so that its surface can adhere to the 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 at one end of the metal tube shell to obtain a heat sink device.

[0058] For the specific working p...

Embodiment 1

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

[0063] Step 1, shell molding: 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: first remove impurities such as organic matter on the surface of the metal matrix composite material shell; then use the cathodic degreasing method 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.

[0065] Step 3, coating the surface of the composite material with a metal layer: by chemical or physical methods, a thin metal layer ...

Embodiment 2

[0077] The controllable thermal expansion rate of the metal matrix composite material device based on gas-liquid phase change heat transfer in this embodiment comes from the metal matrix composite material, and the metal matrix composite material sheet with controllable expansion rate is processed into different lengths, widths, The thickness of the shell is the same as in Example 1.

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Abstract

The invention relates to a metal matrix composite material device based on gas-liquid phase transition and a preparation method thereof. The composite material device comprises a metal tube shell forming a closed cavity, a porous medium arranged in the middle of the metal tube shell and infiltrated with a liquid working medium layer, and a liquid filling port arranged at one end outside the metal tube shell and connected to the porous medium layer, and a heat source device can be set at the other end outside the metal tube shell, and the liquid working medium can undergo gas-liquid phase change after being heated, so The porous medium layer separates the closed cavity of the metal tube shell to form two steam passages. Compared with the prior art, the present invention effectively solves the requirement of high thermal conductivity, controllable thermal expansion rate, and high comprehensive mechanical properties of traditional single metal or ceramic heat-dissipating materials at the same time. direction.

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 areas 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 structure using 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 in the process of evaporation-transmission-condensation in...

Claims

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Application Information

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Patent Type & Authority Patents(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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