Method for preparing porous metal by using mixed gas
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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, complex methods, and high requirements for production equipment, and achieve the effects of uniform distribution, simple process, and low equipment requirements
Active Publication Date: 2017-11-03
HARBIN INST OF TECH
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[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 method of preparing porous metal by using mixed gas solves the problem that the existing micro-nano porous metal preparation process mainly focuses on the initial formation process of metal materials, the method is complicated, heavily relies on templates, and has high requirements for production equipment. The method for preparing the porous metal material: 1. The metal material is first cleaned with acetone, and then cleaned with absolute ethanol and deionized water in sequence; 2. The cleaned metal is heated to 550-850 ° C under the protection of an inert gas, and then The mixed gas composed of fuel gas and oxidizing gas is passed into the carrier body for porous treatment. The invention directly utilizes fuel gas and oxidizing gas to form the expansion and overflow of H2O and CO2 gas inside the metal, and forms a porous structure on the surface and inside of the metal, which has the advantages of simple process, convenient preparation and no pollution, and can be prepared in the Secondary processing can be realized on complex metal material devices, and the requirements for 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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