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3D-printed gradient ceramic-metal material and production method

A ceramic metal, 3D printing technology, applied in the field of 3D printing, can solve the problems of different powder sintering temperature difference sintering shrinkage of different layers, less application of gradient ceramic materials, etc., to reduce residual stress and thermal stress, eliminate stress singularity, The effect of low energy consumption

Active Publication Date: 2021-10-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of fusion covering sintering, it is difficult to solve the major problems of the difference in sintering temperature of powders with different components and the different sintering shrinkage of different layers, and the application in the preparation of gradient ceramic materials is still relatively small.

Method used

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  • 3D-printed gradient ceramic-metal material and production method
  • 3D-printed gradient ceramic-metal material and production method
  • 3D-printed gradient ceramic-metal material and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Preparation of ceramic slurry

[0047] Ceramic powder: alumina (particle size and microscopic appearance such as figure 2 Shown in a and b), mass percent in the slurry system: 60, 65, 70, 75, 80, made into 5 parts of slurry with gradient concentration gradient;

[0048] Metal powder: metal chromium (particle size and microscopic appearance such as figure 2 Shown in a and b), the mass percentage in the slurry system: 40, 35, 30, 25, 20, made into 5 parts of slurry with gradient concentration gradient;

[0049] Dispersant: sodium hexametaphosphate, PEG 6000, the dosage is 2% of the ceramic metal powder in the system.

[0050] Binder: sodium alginate, PVP K30, the dosage is 3% of the ceramic metal powder in the system.

[0051] Solvent: deionized water, the dosage is 10% of the ceramic metal powder in the system.

[0052] After the above materials are mechanically pre-mixed and fully contacted, they are transferred to a ball mill for ball milling for 24 hours at a...

Embodiment 2

[0059] 1. Preparation of ceramic slurry

[0060] Ceramic powder: alumina, mass percentage in the slurry system: 60, 65, 70, 75, 80, 100 to make 6 parts of slurry with gradient concentration gradient;

[0061] Metal powder: metal nickel, the mass percentage in the slurry system: 100, 40, 35, 30, 25, 20, made into 6 parts of slurry with gradient concentration gradient;

[0062] Dispersant: oleic acid, sodium polymetaphosphate, the dosage is 2% of the ceramic metal powder in the system.

[0063] Adhesive: polydimethylsiloxanol, PVP K30, the dosage is 3% of the ceramic metal powder in the system.

[0064] Solvent: deionized water, the dosage is 10% of the ceramic metal powder in the system.

[0065] After the above materials are mechanically pre-mixed and fully contacted, they are transferred to a ball mill for ball milling for 24 hours at a speed of 330r / min, so that the components are evenly dispersed, so that the sum of the mass percentages is 100% gradient ceramic metal slur...

Embodiment 3

[0073] 1. Preparation of ceramic slurry

[0074] Ceramic powder: silicon carbide and alumina, the mass ratio of the two is 1:1, and the mass percentage in the slurry system: 60, 70, 80, made into 3 parts of slurry with gradient concentration gradient;

[0075] Metal powder: metal chromium and nickel, the mass ratio of the two is 1:1, the mass percentage in the slurry system: 40, 30, 20, made into 3 parts of slurry with gradient concentration gradient;

[0076] Dispersant: polyethyleneimine, the dosage is 2.5% of the ceramic metal powder in the system.

[0077] Adhesive: polyvinyl alcohol, the dosage is 4% of the ceramic metal powder in the system.

[0078] Solvent: absolute ethanol, the dosage is 12% of the ceramic metal powder in the system.

[0079] After the above materials are mechanically pre-mixed and fully contacted, they are transferred to a ball mill for ball milling for 24 hours at a speed of 330r / min, so that the components are evenly dispersed, so that the sum of...

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Abstract

The invention provides a 3D-printed gradient ceramic-metal material. The 3D-printed gradient ceramic-metal material comprises ceramic powder, metal powder, a dispersing agent, an adhesive and a solvent, wherein the mass percent of the ceramic powder and the mass percent of the metal powder in a system are changed in a gradient mode, and are sequentially increased or decreased, and the sum of the mass percents of the components is 100%. The gradient ceramic-metal material has high compactness. The invention further provides a production method of the 3D-printed gradient ceramic-metal material. The production method of the 3D-printed gradient ceramic-metal material comprises the following steps: subjecting the solvent, the ceramic powder, the metal powder, the dispersing agent and the adhesive to mixing, stirring and ball milling, wherein the percent of the ceramic powder and the percent of the metal powder in the system are changed in a gradient mode, so that a gradient ceramic-metal series slurry is obtained; and adding the series slurry into a 3D printer, conducting direct writing printing to obtain a gradient ceramic-metal blank, and conducting drying, degreasing and sintering to obtain the gradient ceramic-metal material. According to the method, the gradient ceramic-metal material is produced through 3D direct writing printing, the shrinkage rate is reduced, and the printing thickness can be controlled.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing gradient ceramic metal material and a preparation method. Background technique [0002] 3D printing technology originated at the end of the 19th century. It was realized and developed rapidly in the last century. 3D printing technology has gradually matured, and the process cost and difficulty have been greatly reduced. Now it is widely used in aerospace, electronic information, mold manufacturing and other fields. [0003] Nowadays, the use environment of materials is becoming more and more complex, and the performance requirements of materials are getting higher and higher. Traditional materials are increasingly unable to meet the needs of modern engineering. In 1984, Japanese scientist Toshio Hirai first proposed a new idea and concept of functionally graded materials, and started research. The basic idea of ​​this brand-new material design conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F10/10B33Y10/00B33Y70/10
CPCB22F10/10B33Y10/00B33Y70/10B22F2207/03Y02P10/25
Inventor 孙爱华张帝伟储成义高青青马思维王雨婷叶震宇李志祥郭建军程昱川许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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