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Porous metal material and preparation method thereof

A porous metal, metal technology, applied in ceramic products, manufacturing tools, additive processing and other directions, can solve the problems of difficult removal, low heat resistance of materials, large pollution, etc., to achieve a wide range of applications, low preparation costs, and processing costs. low effect

Pending Publication Date: 2020-04-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordered porous structure NaCl skeleton prepared by 3D printing has low heat resistance of the material and requires a large amount of water to dissolve, and the prepared ordered porous structure Al 2 o 3 , SiC ceramic skeleton, there are problems such as difficult removal and large pollution during the removal process

Method used

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  • Porous metal material and preparation method thereof
  • Porous metal material and preparation method thereof

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preparation example Construction

[0032] The preparation method of the described porous metal material mainly comprises the following steps:

[0033] In step 1, a porous ceramic body corresponding to the porous metal material to be prepared is prepared by using a 3D printing extrusion molding process, and the porous ceramic body is dried and sintered to form a soluble porous ceramic.

[0034]Specifically, the sintering process used is: first sintering at 180°C-250°C for 1-3 hours; then sintering at 700-900°C for 2h-3h; The heating rate is 5-20°C / min. Step one specifically includes the following steps:

[0035] (1) Use 2000-5000 mesh Al 2 o 3 , ZrO 2 , SiO 2 , MgO, SiC, Si 3 N 4 One or more of them are combined with 1000-3000 mesh CaCO 3 The mixture obtained by mixing in any proportion is used as one of the raw materials to prepare a uniform slurry, and the prepared slurry is put into the needle tube of the 3D printer.

[0036] (2) The bottom plate of the 3D printer is preheated at a preheating tempera...

Embodiment 1

[0042] The preparation method of the porous metal material provided by Example 1 of the present invention mainly includes the following steps:

[0043] S1, firstly, 2000 mesh CaCO 3 powder, 5000 mesh SiO 2 The powder is stirred and mixed with the binder polyethylene glycol and silica sol, then the defoamer octanol is added, and the ball mill is used to mix evenly to obtain a slurry, and the mixed slurry is put into the needle tube of the 3D printer; then, 50 Preheat the bottom plate of the 3D printer at a preheating temperature of ℃, and start printing to obtain a porous ceramic body. Wherein, the nozzle diameter of the 3D printer is 0.3mm, the printing layer height is 0.25mm, and the printing speed is 20mm / s.

[0044] S2, drying the porous ceramic body at 45°C, and putting the dried porous ceramic body into a high-temperature sintering furnace for sintering at 200°C for 1.5h, sintering at 800°C for 2h, and sintering at 1100°C for 2h, Sintering was carried out with a heatin...

Embodiment 2

[0048] The preparation method of the porous metal material provided by Example 2 of the present invention mainly includes the following steps:

[0049] S1, firstly, 3000 mesh CaCO 3 Powder, 5000-mesh SiC powder, binder polyethylene glycol, and silica sol are stirred and mixed, then the defoamer octanol is added, and the ball mill is used to mix evenly to obtain a slurry, and the mixed slurry is put into the needle tube of the 3D printer ; Next, preheat the bottom plate of the 3D printer with a preheating temperature of 45° C., and start printing to obtain a porous ceramic body. Wherein, the nozzle diameter of the 3D printer is 0.2mm, the printing layer height is 0.15mm, and the printing speed is 30mm / s.

[0050] S2, drying the porous ceramic body at 50°C, and putting the dried porous ceramic body into a high-temperature sintering furnace for sintering at 200°C for 2h; sintering at 750°C for 1.5h; and sintering at 1200°C for 2h, Sintering was carried out with a heating rate o...

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Abstract

The invention belongs to the related technical field of porous material preparation and discloses a porous metal material and a preparation method thereof. The method comprises steps of (1) preparinga porous ceramic green body corresponding to a porous metal material to be prepared by adopting a 3D printing extrusion molding process, and drying and sintering the porous ceramic green body to formsoluble porous ceramic; (2) infiltrating molten metal into the soluble porous ceramic, and filling a cavity of the soluble porous ceramic with the molten metal so as to obtain a soluble ceramic / metalcomposite green body; and (3) putting the obtained soluble ceramic / metal composite green body into the boiling water to dissolve the soluble ceramic in the soluble ceramic / metal composite green body so as to obtain the porous metal material. The method is simple in preparation process, relatively low in cost, wide in application range and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field related to the preparation of porous materials, and more specifically relates to a porous metal material and a preparation method thereof. Background technique [0002] Porous metal has the characteristics of a metal matrix and a large number of pores, so it has unique properties that dense metals and other porous materials do not have, such as light weight, high strength, high specific stiffness, excellent energy absorption performance, shock absorption and vibration isolation performance, etc. At present, the preparation techniques of porous metal materials mainly include infiltration method, melt foaming method, powder metallurgy method, solid-gas eutectic solidification method, etc. Among them, the infiltration casting method infiltrates the molten metal into the gap of the mold filler under a certain pressure to obtain a composite material of metal and filler. The advantages are: low preparation cost, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08B22D23/04B22D18/04B22D17/00C04B35/057C04B35/117C04B35/119C04B35/14C04B35/053C04B35/577C04B35/596C04B35/622C04B35/64C04B38/00B28B1/00B33Y10/00B33Y30/00
CPCC22C1/08B22D23/04B22D18/04B22D17/00C04B35/057C04B35/117C04B35/119C04B35/14C04B35/053C04B35/565C04B35/587C04B35/622C04B35/64C04B38/00B28B1/001B33Y10/00B33Y30/00C04B2235/5436C04B2235/6562C04B2235/6567C22C1/082
Inventor 蒋文明管峰李广宇朱俊文杨力樊自田
Owner HUAZHONG UNIV OF SCI & TECH
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