Direct-writing forming based preparation method for multielement ceramic functional gradient material

A functionally graded material, direct writing technology, applied in the field of additive manufacturing, can solve the problems of difficult preparation of controllable multi-material ink, less research on multi-material direct writing, etc., to expand the design range, low cost, high precision The effect of density

Inactive Publication Date: 2021-06-22
刘宇涵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to prepare controllable multi-material inks suitable for direct-write molding technology, and there are few studies on functionally gradient multi-material direct-write molding

Method used

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  • Direct-writing forming based preparation method for multielement ceramic functional gradient material
  • Direct-writing forming based preparation method for multielement ceramic functional gradient material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In this embodiment, silicon carbide / silicon nitride / alumina functionally graded materials are prepared.

[0053] (1) Ceramic slurry preparation

[0054]Preparation of silicon carbide slurry: Weigh 60g of SiC powder, add 26g of absolute ethanol, 8g of polyethylene glycol and 1.5g of guar gum, and stir thoroughly to obtain a silicon carbide ceramic slurry with shear thinning;

[0055] Preparation of silicon nitride ceramic slurry: Weigh 65g of silicon nitride powder, add 28g of absolute ethanol, 1g of sodium hexametaphosphate and 1.8g of guar gum, and stir well to obtain a silicon nitride ceramic with shear thinning slurry;

[0056] Preparation of alumina slurry: Weigh 50g of alumina powder, add 13.2g of methyl ethyl ketone, 6.8g of absolute ethanol, 1g of glycerol trioleate and 0.8g of polyvinyl alcohol, and stir well to obtain the oxidation slurry with shear thinning. Aluminum ceramic paste;

[0057] (2) Inject the three different ceramic slurries prepared above into...

Embodiment 2

[0061] This example prepares silicon carbide / titania / zirconia functionally graded material

[0062] (1) Ceramic slurry preparation

[0063] Preparation of silicon carbide slurry: Weigh 60g of SiC powder, add 26g of absolute ethanol, 4g of polyethylene glycol, 1.2g of 25wt% tetramethylammonium hydroxide and 1.5g of guar gum to it, and stir well to obtain Shear thinned silicon carbide ceramic slurry;

[0064] Preparation of titanium dioxide ceramic slurry: Weigh 55g of titanium dioxide powder, add 19g of deionized water, 2g of ammonium methacrylate and 1.4g of guar gum carboxymethyl cellulose, and obtain a shear-thinning titanium dioxide ceramic slurry after fully stirring material;

[0065] Preparation of zirconia slurry: Weigh 50 g of zirconia powder, add 23 g of acetone, 0.8 g of polyvinyl alcohol, and 0.6 g of dibutyl phthalate, and stir thoroughly to obtain a shear-thinning zirconia ceramic slurry;

[0066] (2) The three different ceramic slurries prepared are injected i...

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Abstract

The invention discloses a direct-writing forming based preparation method for a multielement ceramic functional gradient material, and belongs to the technical field of additive manufacturing. The technical problem to be solved in the invention is that there is no proper direct-writing forming technology for preparing the multielement ceramic functional gradient material. The preparation method comprises the following steps: separately injecting different ceramic slurry into multiple layers of coaxial feed cylinders; independently controlling each layer of the feed cylinders to perform extrusion in a direct-writing forming process, thereby obtaining multielement ceramic functional gradient material blanks; and freeze-drying, and vacuum-sintering to obtain the multielement ceramic functional gradient material. A compounding way of multielement materials can be adjusted, so that control on functional gradient of the ceramic materials is realized, and a design range of the ceramic functional gradient material is increased.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a preparation method of a multi-element ceramic functionally graded material based on direct-writing molding. Background technique [0002] A functionally graded material is a material system in which the chemical composition or microstructure of the material changes in one or more dimensions with changes in position. Due to the spatial changes of chemical composition or microstructure of functionally graded materials, the local properties of its components also change, thus obtaining anisotropy in mechanical, thermal, optical, magnetic and other aspects that are difficult to obtain by traditional metallurgical techniques . The traditional methods for preparing functionally graded materials mainly include chemical vapor deposition, which is mainly used for functionally graded coatings, ultrasonic welding, powder metallurgy, etc. However, these methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00B33Y10/00C04B35/584C04B35/10C04B35/46C04B35/48C04B35/565C04B35/63C04B35/632C04B35/634C04B35/636B33Y70/10
CPCB28B1/001B33Y10/00C04B35/584C04B35/565C04B35/10C04B35/48C04B35/46C04B35/632C04B35/63488C04B35/636C04B35/6365C04B35/6313B33Y70/10C04B2235/3217C04B2235/3826C04B2235/6026
Inventor 刘宇涵李赛王权威鲁中良
Owner 刘宇涵
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