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A Strength Enhancement Method of Alumina Porous Materials Based on Powder Bed Fusion

A technology of porous material and alumina, applied in the field of preparation of porous materials in rapid prototyping, can solve the problem of insufficient strength of the test piece, achieve the effects of rapid manufacturing, improve toughness and strength, and shorten the cycle of product development

Active Publication Date: 2021-03-16
陕西斐帛思凯科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of 3D printing porous materials, many porous materials and printed specimens are not strong enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, a method for increasing the strength of alumina porous materials based on powder bed fusion, comprising the following steps:

[0027] 1) Put 400g of silica powder with a median diameter of 5 μm into 1300 g of aluminum hydroxide powder with a median diameter of 25 μm and 300 g of epoxy resin powder with a median diameter of 15 μm, and mix them by mechanical mixing for 3 hours;

[0028] 2) Put the raw materials mixed in step 1) into the powder bed fusion 3D printer, and print out the preform according to the designed three-dimensional model of the porous structure;

[0029] The process parameters used are: preheating 55°C, layer thickness 0.15mm, laser spot 40μm, laser power 25W, scanning speed 2000mm / s, scanning distance 20μm;

[0030] 3) Put the blank into the silica sol with a concentration of 40% for impregnation, put it into a vacuum machine to evacuate, control the pressure of the vacuum machine at 18000Pa, and the corresponding vacuum gauge reading is...

Embodiment 2

[0035] Embodiment 2, a method for increasing the strength of alumina porous materials based on powder bed fusion, comprising the following steps:

[0036] 1) Put 100g of zirconia powder with a median diameter of 5 μm and 100 g of yttrium oxide powder with a median diameter of 5 μm into 1600 g of aluminum hydroxide powder with a median diameter of 25 μm and 200 g of epoxy resin powder with a median diameter of 15 μm. Mix by dry ball milling for 5 hours;

[0037] 2) Put the raw materials mixed in step 1) into the powder bed fusion 3D printer, and print out the preform according to the designed three-dimensional model of the porous structure;

[0038] The process parameters used are: preheating 60°C, layer thickness 0.15mm, laser spot 40μm, laser power 20W, scanning speed 3000mm / s, scanning distance 20μm;

[0039] 3) Put the preform into the silica sol with a concentration of 5% for impregnation, put it into a vacuum machine to evacuate, control the pressure of the vacuum machin...

Embodiment 3

[0044] Embodiment 3, a method for enhancing the strength of alumina porous materials based on powder bed fusion, comprising the following steps:

[0045] 1) Put 60g of magnesium oxide powder with a median diameter of 5 μm into 1340 g of alumina powder with a median diameter of 70 μm and 600 g of epoxy resin powder with a median diameter of 15 μm, and mix them by dry ball milling for 12 hours;

[0046] 2) Put the raw materials mixed in step 1) into the powder bed fusion 3D printer, and print out the preform according to the designed three-dimensional model of the porous structure;

[0047] The process parameters used are: preheating 50°C, layer thickness 0.15mm, laser spot 40μm, laser power 20W, scanning speed 3000mm / s, scanning distance 20μm;

[0048] 3) Put the preform into the silica sol with a concentration of 10% for impregnation, put it into a vacuum machine to evacuate, control the pressure of the vacuum machine at 18000Pa, and the corresponding vacuum gauge reading is 0...

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PUM

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Abstract

Provided is a strength enhancement method of an alumina porous material based on powder bed melting. The strength enhancement method of the alumina porous material based on powder bed melting includesthe steps that firstly, strength enhancement material powder is poured into an initial raw material for mixing; then the mixed raw material is placed in a powder bed melting 3D printer, and a primaryblank is printed according to a designed three-dimensional model of a porous structure; then, the primary blank is immersed in a silica sol, a magnesium sol, a cerium sol or a zirconium sol, and placed in a vacuuming machine for vacuum treatment, so that the primary blank is fully immersed; then the immersed primary blank is taken out and dried in an oven; finally the immersed and dried blank ofthe alumina porous material is subjected to degreasing and then high-temperature calcination to obtain the porous structure with a strength satisfying requirements. The strength enhancement method ofthe alumina porous material based on powder bed melting can be used for producing the alumina porous material with the strength satisfying the requirements.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous materials in rapid prototyping, and in particular relates to a method for increasing the strength of alumina porous materials based on powder bed fusion. Background technique [0002] Porous material is a material with a large number of pores on the surface or inside of the material. Due to its porosity, it has the advantages of large specific surface area, high adsorption capacity, light weight, high specific strength, and good permeability. It can be widely used in ion exchange, Adsorption, filtration and separation, catalysts, sensors, lightweight design and other fields. [0003] Many different materials with micro / macrostructures have been reported, and for most of these porous materials, their properties are closely related to their unique structures. However, the preparation methods of porous materials at home and abroad are relatively traditional, mainly including extrusion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/117C04B35/119C04B35/622C04B38/00B28B1/00
CPCB28B1/001C04B35/117C04B35/119C04B35/622C04B38/00C04B2235/3206C04B2235/3225C04B2235/3244C04B2235/3418C04B2235/5436C04B2235/616C04B2235/656C04B2235/6567C04B2235/96
Inventor 田小永霍存宝
Owner 陕西斐帛思凯科技发展有限公司
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