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A post-processing method for 3D printing high-temperature structural ceramics

A 3D printing and ceramic technology, which is applied in the field of 3D printing applications, can solve the problems such as the loss of structural collapse strength of 3D printed products, and achieve the effects of solving the loss of structural collapse strength, improving structural strength, and fast printing speed

Active Publication Date: 2021-11-16
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a post-processing method for 3D printing high-temperature structural ceramics, enhance the structural strength of 3D printed ceramic products, and solve the problem of loss of structural collapse strength of 3D printed products caused by high-temperature failure of organic adhesives

Method used

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  • A post-processing method for 3D printing high-temperature structural ceramics
  • A post-processing method for 3D printing high-temperature structural ceramics
  • A post-processing method for 3D printing high-temperature structural ceramics

Examples

Experimental program
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Effect test

Embodiment 1

[0038] S1: Soak the silica ceramic product formed by 3D printing with adhesive jetting in a silica sol solution with a solid phase mass percentage of 20% for 10 minutes, take it out and dry it at 100-120°C;

[0039] S2: Soak the sample dried in the above steps in a phosphoric acid solution with a concentration of 45% by mass for 10 minutes, take it out and dry it at 100-120°C;

[0040] S3: The dried sample in the above steps was kept at a temperature of 1680° C. for 1 hour, and cooled naturally to obtain the treated 3D printed silica ceramics.

[0041] Such as figure 2 Shown: This picture is the scanning electron microscope picture of untreated 3D printed silica ceramics. It can be seen from the picture that there are many gaps on the surface, and the cementation effect between the particles is not good; image 3 Shown: This picture is a scanning electron microscope image of 3D printed silica ceramics after secondary impregnation. It can be seen from the figure that the void...

Embodiment 2

[0043] S1: Soak the silica ceramic product formed by 3D printing with adhesive jetting in a silica sol solution with a solid phase mass percentage of 20% for 10 minutes, take it out and dry it at 100-120°C;

[0044] S2: Soak the sample dried in the above steps in a phosphoric acid solution with a concentration of 60% by mass for 10 minutes, take it out and dry it at 110°C;

[0045]S3: The dried samples in the above steps were kept at a temperature of 1680° C. for 1.5 hours, and cooled naturally to obtain processed 3D printed silica ceramics.

[0046] The 3D printed silica products without post-treatment will completely collapse at high temperature, and the compressive strength of the 3D printed silica ceramic products treated by the method of this embodiment is 2.98MPa.

Embodiment 3

[0048] S1: Soak the silica ceramic product formed by 3D printing with adhesive jetting in a silica sol solution with a solid phase mass percentage of 20% for 10 minutes, take it out and dry it at 100-120°C;

[0049] S2: Soak the sample dried in the above steps in a phosphoric acid solution with a concentration of 30% by mass for 10 minutes, take it out and dry it at 110°C;

[0050] S3: The dried samples in the above steps were kept at a temperature of 1680° C. for 1 hour, and then cooled naturally to obtain the processed 3D printed silica ceramics.

[0051] The 3D printed silica products without post-treatment will completely collapse at high temperature, and the compressive strength of the 3D printed silica ceramic products treated by the method of this embodiment is 1.75 MPa.

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Abstract

The invention discloses a post-processing method for 3D printing high-temperature structural ceramics, comprising the following steps: S1: 3D printing ceramic products, using furan resin as a binder, and oxide ceramics as a matrix powder, after 3D printing and sand cleaning Obtain a 3D printed ceramic green body; S2: primary immersion, immerse the 3D printed ceramic green body obtained in step S1 into a silica sol solution, take it out and then dry it; S3: secondary immersion, 3D printed 3D printed body after drying in step S2 The ceramic green body is immersed in the phosphoric acid solution, and then dried after being taken out; S4: sintering, the 3D printed ceramic green body dried in step S3 is kept at a temperature above 1580° C., and the finished product is obtained after cooling. The present invention realizes the effective filling of sample pores through multiple dippings, solves the problem of adhesive failure under high temperature, and the compressive strength of the 3D printed ceramic products treated by the method of the present invention is greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of 3D printing applications, in particular to a post-processing method for 3D printing high-temperature structural ceramics. Background technique [0002] High-temperature structural ceramics have a low thermal expansion coefficient, excellent thermal shock resistance and good economy, and are widely used in the fields of metal smelting and casting. However, the preparation of traditional oxide ceramics not only requires the use of molds to prepare shapes, but also has high manufacturing costs and long production cycles, and once the processing is completed, it cannot be changed in shape or modified in shape. [0003] Binder jetting 3D printing technology is based on the principle of discrete-accumulation molding and droplet jetting, using nozzles to selectively jet liquid binders to directly form solid ceramic powder materials into three-dimensional solid parts. 3D printing technology realizes moldless mol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/634C04B41/89
CPCC04B35/63448C04B41/009C04B41/4578C04B41/52C04B41/89C04B2235/6026C04B35/14C04B41/5089C04B41/5016
Inventor 何培王威徐海燕徐婷婷李军李炯苏宁卢晟
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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