Production method of heat pipe with porous aluminum core

A porous aluminum and heat pipe technology, applied in the field of heat pipes, can solve the problem of destroying the porous core structure and achieve the effect of increasing porosity
CN101294776AInactive Publication Date: 2008-10-29WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2008-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technology field of heat pipes, and particularly relates to a preparation method of a heat pipe with a porous aluminum core. The manufacturing method of the heat pipe with the porous aluminum core is characterized in that the method includes the following steps: (1) material selection: selecting 58-62 wt% of NaCl particles with the diameter being 5-40 Mum and 38-42 wt% of Al powder with the diameter being 5-10 Mum in reserve; (2) mixing the NaCl particles with the Al powder; placing on an aluminum substrate; and then sintering by employing the pulse current technique with the sintering technological parameters of the pre-pressure being 13-17 MPa, the sintering temperature being 570-590 DEG C and the sintering time being 3-5 minutes; and boiling sintering blocks in the water for 35-50 minutes to obtain composite plates with porous aluminum core; (3) welding the obtained composite plates into flat heat pipes, vacuum-pumping, inletting the working medium, and sealing to obtain the heat pipe. The preparation method is characterized by high porosity, controllable pore diameter and tight connection.
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Description

technical field

[0001] The invention belongs to the technical field of heat pipes, and in particular relates to a preparation method of heat pipes with porous aluminum cores. Background technique

[0002] Heat pipe is the most efficient heat transfer element so far, and has important applications in the fields of electronic components and power equipment. It uses the latent heat of phase change to transfer heat from one end to the other. A typical heat pipe consists of a shell, wick and end caps. Pump the inside of the tube to 1.3×(10 -1 -10 -4 After the negative pressure of ) Pa, it is filled with an appropriate amount of working liquid, so that the capillary porous material of the liquid-absorbing core close to the inner wall of the tube is filled with liquid and then sealed. When one end of the heat pipe is heated, the liquid in the capillary wick evaporates, and the steam flows to the other end under a small pressure difference to release heat and condenses into a li...

Claims

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