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Method for stereolithography-based 3D printing ceramic component suitable for self repair/self enhancement

A light-curing molding and 3D printing technology, applied in the direction of additive processing, can solve the problem of low solid phase content, achieve high density, increase green body density, and repair microscopic cracks

Active Publication Date: 2018-08-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after degreasing the ceramic parts prepared by photocuring molding, many microscopic defects are easily produced inside; and in the actual molding process, in order to ensure the shape accuracy, the solid phase content of the ceramic photocuring slurry used (ceramic The ratio of powder to light-cured slurry) is generally low, resulting in the density of the green body after degreasing is often lower than that of the ceramic green body prepared by the traditional method

Method used

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  • Method for stereolithography-based 3D printing ceramic component suitable for self repair/self enhancement
  • Method for stereolithography-based 3D printing ceramic component suitable for self repair/self enhancement
  • Method for stereolithography-based 3D printing ceramic component suitable for self repair/self enhancement

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Experimental program
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Effect test

Embodiment 1

[0121] (1) Green body preparation

[0122] Prepare the light-curing premix solution with ethoxylated pentaerythritol tetraacrylate, methylpentanol, polydimethylsiloxane, etc. in a ratio of 100:2:2, and then mix it with alumina ceramic powder at a solid phase content of 36vol% (ie The volume ratio of the ceramic powder to the light-cured ceramic slurry) is mixed to prepare the alumina light-cured slurry. The main process parameters of photocuring were optimized, the exposure time was 6s, and the layer thickness was 10μm. Then, the photocured ceramic slurry was subjected to photocuring treatment, and the obtained alumina body was first degreased in vacuum and then degreased in air. The heating rate was uniform. The temperature is 5°C / min, the maximum temperature is 650°C, and the holding time is 2h. Then pre-burning treatment is carried out, the pre-burning temperature is 1100°C, the heating rate is 5°C / min, and the holding time is 2h. The porosity of the green body obtained a...

Embodiment 2

[0133] Example 2 Zirconia

[0134] (1) Green body preparation

[0135] Prepare the light-curing premix solution with ethoxylated pentaerythritol tetraacrylate, methylpentanol, polydimethylsiloxane, etc. in a ratio of 100:2:2, and then mix it with alumina ceramic powder at a solid phase content of 37vol% (ie The volume ratio of the ceramic powder to the light-cured ceramic slurry) is mixed to prepare the zirconia light-cured slurry. The main process parameters of photocuring were optimized, the exposure time was 6s, and the layer thickness was 10μm. Then, the photocured ceramic slurry was subjected to photocuring treatment, and the obtained alumina body was first degreased in vacuum and then degreased in air. The heating rate was uniform. The temperature is 5°C / min, the maximum temperature is 650°C, and the holding time is 2h. Then pre-burning treatment is carried out, the pre-burning temperature is 1100°C, the heating rate is 5°C / min, and the holding time is 2h. The porosit...

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Abstract

The invention provides a method for stereolithography-based 3D printing ceramic component suitable for self repair / self enhancement. The method comprises the following steps: (A) performing pre-sintering or cold isostatic pressing on a multi-hole 3D printing ceramic body subjected to stereolithography; placing the processed multi-hole 3D printing ceramic body in impregnation liquid of cationic salt corresponding to the ceramic, and performing self impregnation; adding an alkaline solution, performing home position precipitation, and performing drying, so as to obtain the body subjected to selfimpregnation and home position precipitation, wherein the impregnation liquid is a 0.1-10 mol / L cationic solution of ceramic elements corresponding to the multi-hole 3D printing ceramic body; (B) sintering the body after self impregnation and home position precipitation so as to obtain the 3D printing ceramic component suitable for self repair / self enhancement.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a method for self-repairing / self-reinforcing 3D printing ceramic parts based on photocuring molding. Background technique [0002] In addition to the characteristics of structural ceramics such as high temperature resistance, corrosion resistance, high strength, high hardness, high chemical stability, and good biocompatibility, ceramic materials also have functional properties such as light transmission, wave transmission, and laser light. It has been widely used in high-tech fields such as machinery, military industry, electronics, semiconductors, and medicine. However, the traditional ceramic preparation methods are difficult to form parts with complex shapes, which limits the application of ceramic parts to a certain extent. Therefore, it is necessary to find a simple and feasible method for preparing transparent ceramic complex parts. [0003] DLP lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C04B35/10C04B35/48C04B35/632C04B35/634B33Y70/00
CPCB33Y70/00C04B35/10C04B35/48C04B35/632C04B35/634C04B41/4578C04B41/85C04B2235/6026C04B2235/608C04B2235/6562C04B2235/77C04B2235/96C04B41/4535
Inventor 何荣烜刘伟黄梅鹏伍海东伍尚华
Owner GUANGDONG UNIV OF TECH
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