Method for preparing surface porous metal material

A metal material with a porous surface technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve problems such as process instability, micropore size, density and distribution are difficult to control
CN101168213AInactive Publication Date: 2008-04-30JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2008-04-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing multi-aperture metal materials, and the invention is disclosed for solving the problem of instability of the present preparation technology of the multi-aperture metal materials and the problem of the difficult controlling of size and density of pores. The producing characteristics of the method are that high-current pulse electronic beam (HCPEB) is employed to irradiate the metal materials, the working parameters of the high-current pulse electronic beam are that the energy of the electronic beam is 18-28 kilo electron volt, the pulse time is 3.5 microseconds, the energy density is about 2-4Jcm-2, and the air pressure of a vacuum chamber is about 10-5Torr. According to the requirements of pore size, distribution density and the like, technology parameters of grain size of materials needed to be irradiated, the energy of pulse electronic beam and the irradiating times are properly selected, and thereby different index requirements are met. The preparation technology disclosed by the invention is stable, and is capable of obtaining the metal materials of multi-pores on the surface, and the quantity and the distribution of the pores are controllable.
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Description

technical field

[0001] The invention relates to the technical field of porous material preparation, in particular to a method for preparing surface porous metal materials by using low-energy, high-current, and short-pulse electron beams as impact sources. Background technique

[0002] Porous materials are new materials developed in recent years, which have the characteristics of structural materials and functional materials. Compared with dense materials, the remarkable feature of porous materials is that they have a large number of pores inside, which determines many excellent characteristics of porous materials, such as small specific gravity, high specific strength, good energy absorption, large specific surface area, and vibration suppression effect. Good, good permeability and sound absorption, good electromagnetic wave absorption characteristics and sensitivity to gas and other characteristics. These characteristics make porous materials widely used in filters, cataly...

Claims

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