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A technology of mixed gas and porous metal, which is applied in the field of porous metal preparation, can solve the problems of relying on templates, high requirements for production equipment, complicated methods, etc., and achieve the effect of low cost, low equipment requirements and simple process
Active Publication Date: 2016-04-20
HARBIN INST OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the existing process of preparing micro-nano porous metal mainly focuses on the initial formation process of metal materials, the method is complicated, relies heavily on templates, and has high requirements for production equipment, and provides a method of using mixed gas directly in the Prepared metal material surface, method for preparing porous structure in situ
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specific Embodiment approach 1
[0023] Specific Embodiment 1: In this embodiment, the method for preparing a porous metal material using a mixed gas is implemented according to the following steps:
[0024] 1. Ultrasonic cleaning the metal material or foam metal material with acetone, then using absolute ethanol and deionized water to clean it in turn, and drying to obtain the cleaned metal;
[0025] 2. Place the cleaned metal obtained in step 1 in a high-temperature-resistant carrier, raise the temperature to 550-850°C under the protection of an inert gas, and then pass the mixed gas composed of fuel gas and oxidizing gas into the carrier where the metal is placed In the body, the metal is exposed to the mixed gas for porous treatment to complete the preparation of porous metal materials;
[0026] Wherein the fuel gas described in step 2 is hydrogen, carbon monoxide, C 1 ~C 4 One or more mixed gases of hydrocarbons, biogas, natural gas, liquefied petroleum gas, coke oven gas, water gas, and petroleum gas....
specific Embodiment approach 2
[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the metal materials are aluminum, gallium, indium, thallium, germanium, tin, lead, antimony, bismuth, polonium, manganese, iron, cobalt, nickel, Copper, gold, silver, ruthenium, rhodium, palladium, osmium, iridium, platinum, iron, copper or titanium alloys. Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the oxidizing gas in step 2 is air or oxygen. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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Abstract
The invention provides a method for preparing porous metal with mixed gas in order to solve the problems that an existing micro-nano-porous metal preparation technology mainly concentrates on the initial formation process of metal materials, the method is complex and seriously relies on a die template, and the requirements for production equipment are high. The method for preparing the porous metal includes the steps that firstly, the metal materials are cleaned with acetone firstly and then cleaned with absolute ethyl alcohol and deionized water sequentially; and secondly, the temperature of the cleaned metal is raised to 550-850 DEG C under the protection of inert gas, then the mixed gas composed of fuel gas and oxidation gas is introduced into a carrier to carry out porous processing. A porous structure is formed on the surface of and inside the metal by directly using the expansion and overflowing of H2O gas and CO2 gas formed by the fuel gas and the oxidation gas inside the metal. The method has the advantages that the technology is simple, preparation is convenient, and pollution is avoided. Secondary processing can be achieved on a prepared complex metal device, and the requirements for the equipment are low.
Description
technical field [0001] The invention relates to a method for preparing porous metal, in particular to a simple method for obtaining porous metal by using mixed gas under high temperature conditions. Background technique [0002] Porous metal is composed of a metal skeleton and internal pores, and has basic metal properties such as weldability of metal materials. Compared with dense metal materials, the remarkable feature of porous metals is that they have a large number of pores inside. And a large number of internal pores make porous metal materials have many excellent characteristics, such as small specific gravity, large specific surface, good energy absorption, low thermal conductivity (closed-pore body), high heat exchange and heat dissipation capacity (through-hole body), absorption Good acoustic performance (through-hole body), excellent permeability (through-hole body), good electromagnetic wave absorption (through-hole body), flame resistance, heat and fire resista...
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