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Method for preparing porous metal through high-temperature oxidation and reduction

A porous metal, high-temperature oxidation technology, applied in the field of porous metal preparation, can solve problems such as complex methods, dependence on templates, and high requirements for production equipment, and achieve the effect of simple process, uniform distribution, and low equipment requirements

Active Publication Date: 2016-04-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing preparation process of 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 gas under high temperature conditions. Oxidation-reduction methods for in-situ preparation of porous structures on the surface of prepared metal materials

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  • Method for preparing porous metal through high-temperature oxidation and reduction
  • Method for preparing porous metal through high-temperature oxidation and reduction
  • Method for preparing porous metal through high-temperature oxidation and reduction

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specific Embodiment approach 1

[0022] Embodiment 1: The method for preparing porous metal by high-temperature oxidation and reduction in this embodiment is implemented according to the following steps:

[0023] 1. The metal material or (corresponding) foam metal material is ultrasonically cleaned with acetone, then cleaned with absolute ethanol and deionized water in turn, and the cleaned metal is obtained after drying;

[0024] 2. Place the cleaned metal obtained in step 1 in a high-temperature-resistant carrier, raise the temperature to 100-850°C under the protection of an inert gas, and then pass the oxidizing gas into the carrier where the metal is placed, so that the metal is exposed to oxidation. Oxidation treatment in gas to form metal oxides;

[0025] 3. Use an inert gas to purge and exhaust the oxidizing gas in the high-temperature-resistant carrier body, and then pass the reducing gas into the high-temperature-resistant carrier body at a temperature of 300-850 ° C, so that the metal oxide is expos...

specific Embodiment approach 2

[0030] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the metal material described in step 1 is 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, mercury or titanium alloys. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the form of the metal material in Step 1 is powder, metal wire, metal sheet or metal film. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0032] In this embodiment, the metal material can also be a prepared metal device, and the oxidation-reduction process is used to realize in-situ porous preparation on the surface of the complex device.

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Abstract

The invention relates to a method for preparing porous metal, in particular to a method for preparing porous metal through high-temperature oxidation and reduction 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 of firstly, cleaning the metal materials, secondly, heating a carrier to the temperature of 100-850 DEG C under the protection of inert gas and exposing the metal materials in oxidization gas for oxidation treatment, and thirdly, exhausting the oxidation gas, raising the temperature to 300-850 DEG C, exposing metal oxide in reduction gas for reduction treatment, and finally obtaining the porous metal after cooling under the protection of inert gas. A porous structure is formed on the surface of and inside the metal by directly using the oxidation gas and reduction gas, the preparation technology is simple, and secondary processing can be achieved on a prepared complex metal device.

Description

technical field [0001] The invention relates to a preparation method of porous metal. Background technique [0002] Porous metal material is a new type of material developed in the 1940s. It consists of a metal matrix and a large number of pores. The pores divide the metal phase into many small units, also known as porous metal foam. It has a new structure different from traditional materials. This different structure endows the porous metal with the characteristics of both structural materials and functional materials: as a structural material, it has the characteristics of low density (20% to 60% of the original compact metal) and high specific strength; as a functional material, it has a large specific surface area and energy. Good absorption and special heat transfer and acoustic characteristics. Porous metals have been widely used in recent years. It can be used as shock absorbers, buffers, energy absorbers, filters, fluid permeators, heat exchangers, fire extinguishe...

Claims

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Application Information

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IPC IPC(8): C22C1/08
CPCC22C1/08C22C1/088
Inventor 王志红陈义夫韩文桥吕喆敖广红黄喜强张耀辉李一倩
Owner HARBIN INST OF TECH
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