A low temperature liquid phase sintering forming method of mixed metal fiber sintered felt

A technology of fiber sintered felt and mixed metal, which is applied in metal processing equipment, coating, transportation and packaging, etc. It can solve the problems of complex porous metal fiber carrier board technology, and achieve small deformation, low sintering temperature and high mechanical strength. Effect

Active Publication Date: 2017-10-20
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the complex process problem of manufacturing porous metal fiber carrier plate by the current liquid phase sintering technology, and provide a low-temperature liquid phase sintering forming method of mixed metal fiber sintering felt with good catalytic performance, long catalyst service life and easy installation

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  • A low temperature liquid phase sintering forming method of mixed metal fiber sintered felt

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this embodiment, copper and aluminum are used as metals to make metal fibers. Copper fibers and aluminum fibers can be manufactured by using a special multi-tooth tool to turn copper rods and aluminum rods on an ordinary lathe. The surface of the metal fiber processed by this method has a rich microstructure, and the equivalent diameter is 50-100 μm. In particular, copper fibers with a diameter of 60 μm and aluminum fibers with a diameter of 50 μm are used in this embodiment. Then, cut the metal fiber into appropriate small sections, the length is about 15-20mm, especially, the present embodiment uses 20mm, and coats a layer of zinc / tin layer with a thickness of 5 μm on the surface of the aluminum fiber, and mixes the copper fiber and the aluminum fiber evenly Pressed into a mixed metal fiber sintered mat with a predetermined porosity.

[0028] The present invention designs and manufactures a special abrasive tool for preparing mixed metal fiber sintered felt by low-...

Embodiment 2

[0031]In this embodiment, stainless steel and copper are used as metals to make metal fibers, and the metal fiber processing method and abrasive molding method are the same as those in Embodiment 1. Use stainless steel fibers and copper fibers to cut into small sections with a length of 20 mm and a diameter of 60 μm to make a mixed metal fiber sintered felt with a porosity of 80% and a thickness of 2 mm. Put the above-mentioned abrasive tools into a sintering furnace for sintering at a temperature of 210 ° C , When the holding time is 30min, nitrogen is used as a protective gas at the same time. After the holding time is over, let it cool down to room temperature with the furnace, and finally take out the abrasive tool and disassemble the abrasive tool to obtain a mixed metal fiber sintered felt.

Embodiment 3

[0033] In this embodiment, stainless steel and aluminum are used as metals to make metal fibers, and the metal fiber processing method and abrasive molding method are the same as those in Embodiment 1. Use stainless steel fibers and aluminum fibers to cut into small sections with a length of 20 mm and a diameter of 60 μm to make a mixed metal fiber sintered felt with a porosity of 90% and a thickness of 2 mm. Put the above-mentioned abrasive tools into a sintering furnace for sintering at a temperature of 220 ° C , When the holding time is 30min, nitrogen is used as a protective gas at the same time. After the holding time is over, let it cool down to room temperature with the furnace, and finally take out the abrasive tool and disassemble the abrasive tool to obtain a mixed metal fiber sintered felt.

[0034] The invention discloses a low-temperature liquid-phase sintering forming method of a mixed metal fiber sintered felt. The manufacturing process of mixed metal fiber sin...

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Abstract

The invention relates to a low-temperature liquid-phase sintering forming method of a mixed metal fiber sintered felt, which relates to composite metal fibers. 1) Cut the metal fiber into multiple sections as required to obtain a variety of metal fiber sections; 2) Heat and melt zinc and tin to obtain a metal solution, then put the metal fiber section into the metal solution, take it out and cool it; 3) Repeat Step 2) until the surface of the metal fiber segment is plated with a layer of zinc-tin mixed layer to obtain the mixed metal fiber, and then placed in the abrasive tool; 4) using the abrasive tool pressing plate to press the mixed metal fiber in the mold cavity of the abrasive tool, Make the mixed metal fiber fill the entire cavity; 5) Put the abrasive tool into the sintering furnace to melt the mixed metal fiber, feed N2 when the temperature of the sintering furnace is lower than 100°C, and feed H2 when the temperature of the sintering furnace reaches 200°C, The zinc-tin metal diffuses and gathers to the intersection point of the mixed metal fibers in the liquid state. After the temperature setting program of the sintering furnace is executed, it is cooled with the furnace to obtain a mixed metal fiber sintered felt.

Description

technical field [0001] The invention relates to composite metal fibers, in particular to a low-temperature liquid-phase sintering forming method of mixed metal fiber sintered felt. Background technique [0002] Metal fiber porous material is a kind of porous metal material made of metal fiber (such as solid-state sintering technology), which has the structural characteristics of three-dimensional network structure, high-precision fully connected aperture and high porosity (Zhou W, WangQ , Li J, et al. Hydrogen production from methanol steam reforming using porous copper fiber sintered felt with gradient porosity. Int J Hydrogen Energy 2015; 40:244-255). In addition to the characteristics of short reaction channel and small reaction pressure drop, the microreactor with porous material as the catalyst carrier also has a three-dimensional porous network structure and a larger specific surface area, which can load more effectively and evenly. Catalysts to form microstructure ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/04C22C47/14B22F3/10
CPCC22C47/04C22C47/14B22F3/002B22F3/1035B22F2998/10B22F1/17B22F3/02
Inventor 周伟柯育智张锦镭万绍隆杨坤刘瑞亮
Owner XIAMEN UNIV
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