Method for manufacturing fiber reinforced gradient porous ceramic based on 3D printing

A manufacturing method and fiber-reinforced technology, applied in the field of 3D printing rapid prototyping, can solve the problems of difficult continuous change of materials, difficulty in controlling the pore size and distribution of gradient porous ceramics, etc., to reduce dust bridging, facilitate dust removal, and improve application The effect of longevity

Inactive Publication Date: 2018-01-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This manufacturing method can solve the problem that the pore size and distribution of gradient porous ceramics prepared by traditional technology are difficult to control and the materials between layers are difficult to change continuously.

Method used

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  • Method for manufacturing fiber reinforced gradient porous ceramic based on 3D printing
  • Method for manufacturing fiber reinforced gradient porous ceramic based on 3D printing
  • Method for manufacturing fiber reinforced gradient porous ceramic based on 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Use computer-aided design modeling software: CAD, UG, Pro / E, etc. to design a three-dimensional solid model of gradient pore structure (pore gradient is 20% to 80%) according to the requirements of product pore size, pore distribution, and pore shape. The 3D model was approximated to obtain the STL format file, and the 3D model was discretized into a series of ordered 2D layers along the forming height direction with a layer interval of 0.1 mm. The 3D printer software guided the printer to print layer by layer. In this embodiment, printing of five layers is taken as an example, and Table 1 shows the porosity distribution of the three-dimensional model in this embodiment.

[0040] 2) To form gradient porous ceramics, the composition ratio requirements of each layer are: from the bottom to the top, the mass fraction of carbon fiber in each layer is: 0%, 13%, 22%, 26%, and 30%, and the mass fraction of polyvinyl alcohol is 8%. , the mass fractions of alumina are: 92%, 7...

Embodiment 2

[0050] 1) Use computer-aided design modeling software: CAD, UG, Pro / E, etc. to design a three-dimensional solid model of gradient pore structure according to the requirements of product pore size, pore distribution, and pore shape (the pore gradient is 20% to 80%, see Table 1), approximate the 3D model to obtain the STL format file, discretize the 3D model into a series of ordered 2D layers along the forming height direction, the layer interval is 0.1 mm, and the 3D printer software guides the printer to print layer by layer.

[0051] 2) The component ratio requirements for forming gradient porous ceramics are: from the bottom to the top, the mass fractions of carbon fibers in each layer are: 0%, 11%, 19%, 25%, 30%, the mass fraction of polyvinyl alcohol is 8%, silicon carbide The mass fractions are: 92%, 81%, 73%, 67%, 62%, respectively.

[0052] 3) Add bonding ink to the nozzle, wherein the bonding ink is composed of distilled water, glycerol and polyvinylpyrrolidone; the di...

Embodiment 3

[0057] 1) Use computer-aided design modeling software: CAD, UG, Pro / E, etc. to design a three-dimensional solid model of gradient pore structure (pore gradient is 60% to 70%) according to the requirements of product pore size, pore distribution, and pore shape. The 3D model was approximated to obtain the STL format file, and the 3D model was discretized into a series of ordered 2D layers along the forming height direction with a layer interval of 0.1 mm. The 3D printer software guided the printer to print layer by layer.

[0058] 2) The composition ratio requirements for forming gradient porous ceramics are as follows: from the bottom to the top, the mass fraction of silicon carbide fibers in each layer is 0%, 16%, 24%, 28%, and 33%, and the mass fraction of polyvinyl alcohol is 8%. Silicon mass fractions are: 92%, 76%, 68%, 64%, 59%.

[0059] 3) Add bonding ink to the nozzle, wherein the bonding ink is composed of distilled water, glycerol and polyvinylpyrrolidone; the distri...

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Abstract

The invention discloses a method for manufacturing fiber reinforced gradient porous ceramic based on 3D printing. The method comprises the following steps that a three-dimensional entity model is designed in modeling software and subjected to hierarchical slicing treatment, and then the processing route printed by a printer layer by layer is generated; ceramic powder, fiber powder and binder powder are placed in different powder feeder correspondingly, mixed evenly on line, and then sent to a powder-laying cylinder to wait for powder laying; adhesive ink is added; under control of a control system, spraying heads selectively spray the adhesive ink in a target area, and thus printing of the first-layer section is completed; then, a working table containing a powder bed is lowered by the height equal to the thickness of a layer, and the processes are continuously repeated to complete printing of all the sections to form a three-dimensional entity; and the blank is placed in a vacuum sintering furnace to be subjected to sintering reinforcement treatment, and a fiber reinforced gradient porous ceramic element is obtained. By adjusting and controlling double gradient distribution of a reinforced phase fiber material and a pore structure, the porous ceramic which is uniform in mechanical property and controllable in pore distribution is obtained.

Description

technical field [0001] The invention relates to 3D printing rapid prototyping technology, in particular to a manufacturing method of fiber-reinforced gradient porous ceramics based on 3D printing. Background technique [0002] Due to its asymmetric pore structure, gradient porous ceramics effectively improve the permeability and strength of porous ceramics, and have the characteristics of high filtration precision and large air permeability coefficient. It can greatly improve filtration precision and filtration efficiency in the field of filtration separation, especially suitable for Separation of mixed fluids containing fine particles such as high temperature and corrosiveness, high-temperature flue gas dust removal and fine filtration, etc. Fiber-reinforced ceramic matrix composites have high fracture toughness and flexural strength, and the gradient distribution of fibers is conducive to the regulation of gradient porosity Improve the mechanical properties of ceramic mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00B28B11/24
Inventor 刘凯刘悦孙华君余际星黄尚宇
Owner WUHAN UNIV OF TECH
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