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Method for preparing metal fiber felt through resistance sintering, metal fiber felt and application of metal fiber felt

A metal fiber felt and metal fiber technology, which can be used in circuits, fuel cells, electrical components, etc., and can solve the problems of high energy consumption, long sintering time, and expensive equipment.

Active Publication Date: 2021-02-23
WESTERN METAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in proton exchange membrane fuel cells, when metal fiber mats are used as fuel cell bipolar plates, it is required that the fiber mats can evenly distribute the reaction gas. Ordinary fiber mats are prone to the problem of reaction gas accumulation, resulting in low cell efficiency.
[0003] The common preparation methods of metal fiber felt are vacuum sintering method and spark plasma sintering method. Among them, the preparation of metal fiber felt by vacuum sintering method has the disadvantages of large energy consumption and long sintering time; the preparation of metal fiber felt by spark plasma sintering method is expensive. The production cost is high, and its pressure value is relatively large, so it is impossible to prepare metal fiber felt with high porosity

Method used

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  • Method for preparing metal fiber felt through resistance sintering, metal fiber felt and application of metal fiber felt
  • Method for preparing metal fiber felt through resistance sintering, metal fiber felt and application of metal fiber felt
  • Method for preparing metal fiber felt through resistance sintering, metal fiber felt and application of metal fiber felt

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Embodiment 1

[0042] In this embodiment, the flow chart of the method for preparing metal fiber felt by step-by-step resistance sintering is as follows figure 1 As shown, the schematic diagram of the structure of the resistance sintering furnace is shown in figure 2 shown.

[0043] The iron-chromium-aluminum cutting fiber with a length of 15mm and a diameter of 22μm is loosely laid in the hopper through an air felting machine. The cross-sectional size of the hopper is 70×70mm, and the thickness of the loosely laid metal fiber is 16mm. The hopper is transported through the slideway To the top of the mold, turn on the switch at the bottom of the hopper so that the iron-chromium-aluminum fiber in the hopper falls into the mold. The mold is made of hard graphite material, the specification is 73×73×400mm (length×width×height), and the embedded thickness of the side mold is 3mm Al 2 o 3 Insulating ceramics, open the hydraulic device to make the conductive sheet contact with the fiber and mai...

Embodiment 2

[0045] In this embodiment, the flow chart of the method for preparing metal fiber felt by step-by-step resistance sintering is as follows figure 1 As shown, the schematic diagram of the structure of the resistance sintering furnace is shown in figure 2 As shown, the schematic diagram of the flow channel of the conductive sheet is shown in image 3 shown.

[0046] The 316L stainless steel bundled drawn fibers with a length of 15mm and a diameter of 22μm are loosely laid in the hopper through an air felt machine. The cross-sectional size of the hopper is 70×70mm, and the thickness of the fiber is 16mm each time. Loosely spread the fibers. After the first and second loosely laid fibers are loaded into the hopper, graphite separators with specifications of 70×70×10mm (length×width×height) are placed respectively. After the third layer of fiber is loosely laid, graphite separators are not required. Plate, the lower surface of the graphite separator is provided with a serpentine ...

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Abstract

The invention provides a method for preparing a metal fiber felt through resistance sintering, the metal fiber felt and an application of the metal fiber felt. The method comprises the steps of placing metal fibers in a sintering mold; carrying out prepressing by using a compression device, and carrying out resistance sintering after vacuumizing to obtain the metal fiber felt; and a flow channel is formed in one surface, in contact with the metal fibers, of the compression device. According to the method, the metal fiber felt is prepared through prepressing, vacuumizing and resistance sintering, and the metal fiber felt with the flow channel is formed after resistance sintering; the method for preparing the metal fiber felt through resistance sintering has the advantages that the heating rate is high, the sintering time is short, the energy consumption and the cost are low, and the porosity of the metal fiber felt can be regulated and controlled; the method for preparing the metal fiber felt through resistance sintering is provided for the first time, and the problems of poor fluidity and uneven distribution of fluid in the fiber felt surface are solved, so that the fiber felt hasa better flow guiding effect.

Description

technical field [0001] The invention relates to the technical field of metal fiber felt preparation, in particular to a method for preparing metal fiber felt by resistance sintering, the metal fiber felt and its application. Background technique [0002] Metal fiber felt has the advantages of good permeability, renewability, long life, and high dirt holding capacity. It has been widely used in filtration and separation fields such as gas filtration, sewage treatment and petrochemical industry. With the continuous expansion of the application field of metal fiber felt , Gradually applied to new fields such as high-efficiency heat transfer, fuel cells and microchannel reactions. The application of metal fiber felt in new fields requires it to have the function of uniformly distributing fluid (liquid or gas). Usually, the surface of the fiber felt is planar, and the fluid preferentially flows along the direction perpendicular to the plane of the fiber felt, while the flow in th...

Claims

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Application Information

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IPC IPC(8): B22F3/14H01M8/0232
CPCB22F3/002B22F3/14H01M8/0232Y02E60/50
Inventor 葛鹏王晓哲高建平王瑞琴任碧莹
Owner WESTERN METAL MATERIAL
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