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Photocuring 3D printing manufacturing method of high-porosity ceramic core

A ceramic core and 3D printing technology, applied in the field of additive manufacturing, can solve the problems of cumbersome and complicated ceramic core forming process, cumbersome ceramic core forming technology, low porosity and difficult removal, etc., to reduce the difficulty of removal, The effect of shortening the cycle time and increasing the porosity

Inactive Publication Date: 2021-04-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 3D printing technology provides an efficient and rapid prototyping method for the manufacture of ceramic cores. However, it is difficult to remove alumina by reaction with alkali, which limits its industrial application.
However, the molding technology of the ceramic core used in these preparation methods is too cumbersome, which limits its industrial application.
[0005] The preparation of ceramic cores still has problems such as cumbersome and complicated molding process, low porosity and difficult to remove, which hinder the application of this technology in industrial production

Method used

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  • Photocuring 3D printing manufacturing method of high-porosity ceramic core
  • Photocuring 3D printing manufacturing method of high-porosity ceramic core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 700g of inorganic powder composed of graphene (10g), alumina powder (600g) and silica powder (90g) mixed uniformly was added to 300g of photosensitive resin to obtain a ceramic slurry; then the obtained ceramic slurry was cured by light The ceramic core blank was printed by a 3D printer; the obtained ceramic core blank was placed in a tube furnace, and the temperature was raised to 500°C at a rate of 1°C / min in an argon atmosphere and kept for 2 hours; then it was transferred Put it into a muffle furnace, raise the temperature to 550°C at a rate of 1°C / min and hold for 2 hours, then raise the temperature to 1400°C at a rate of 5°C / min and hold for 2 hours to obtain a ceramic core with high porosity.

Embodiment 2

[0030] 750g of inorganic powder composed of graphene (50g), alumina powder (600g) and zirconia powder (100g) mixed uniformly was added to 250g of photosensitive resin to obtain ceramic slurry; then the obtained ceramic slurry was cured by light The ceramic core blank was obtained by a 3D printer; the obtained ceramic core blank was placed in a tube furnace, and the temperature was raised to 550 °C at a rate of 2 °C / min in an argon atmosphere and kept for 1 h; then it was transferred to In the muffle furnace, the temperature was raised to 650°C at a rate of 2°C / min and held for 1 hour, and then raised to 1450°C at a rate of 7°C / min and held for 2 hours to obtain a ceramic core with high porosity.

Embodiment 3

[0032] 80g of inorganic powder composed of graphene (10g), alumina powder (63g) and yttrium oxide powder (7g) mixed uniformly was added to 20g of photosensitive resin to obtain ceramic slurry; then the obtained ceramic slurry was cured by light The ceramic core blank was obtained by a 3D printer; the obtained ceramic core blank was placed in a tube furnace, and the temperature was raised to 600°C at a rate of 5°C / min in an argon atmosphere and kept for 3h; then it was transferred to In the muffle furnace, the temperature was raised to 600°C at a rate of 5°C / min and held for 3 hours, and then raised to 1350°C at a rate of 10°C / min and held for 3 hours to obtain a ceramic core with high porosity.

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Abstract

The invention relates to a photocuring 3D printing manufacturing method of a high-porosity ceramic core, which comprises the following steps: adding graphene into inorganic powder taking aluminum oxide as a main body, uniformly mixing, and adding the mixture into photosensitive resin to obtain ceramic slurry; pouring the ceramic slurry into a photocuring 3D printer, and printing under an ultraviolet lamp curing condition to obtain a ceramic core biscuit; placing the ceramic core biscuit in a tubular furnace, and completing the degreasing process under the conditions of a certain heating rate, temperature and heat preservation time in the argon atmosphere; and transferring into a muffle furnace, and completing the removal and sintering process of the graphene under the conditions of certain heating rate, temperature and heat preservation time in an air atmosphere. According to the invention, graphene is introduced into the ceramic slurry and is removed in the heat treatment process, so that the porosity of the ceramic core is improved, the removal difficulty is reduced, and the removal process of the ceramic core is facilitated. The method can be applied to the field of production of alumina-based ceramic cores.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and relates to a light-curing 3D printing manufacturing method for a high-porosity ceramic core. Background technique [0002] The alumina-based ceramic core is used to form the precise structure of the hollow blade inner cavity due to its complex structure and good high-temperature chemical stability. [0003] 3D printing technology provides an efficient and rapid prototyping method for the manufacture of ceramic cores. However, it is difficult to remove alumina by reacting with alkali, which limits its industrial application. Increasing the porosity of the ceramic core can provide more contact space for the alkali solution, which is beneficial to the removal of the ceramic core. [0004] The Institute of Metal Research, Chinese Academy of Sciences (Chinese Patent, Patent No. CN102266906A) proposed a method of adding carbon nanotubes to prepare ceramic cores. The space pipes form...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B35/638C04B35/634C04B38/06B33Y70/10B33Y10/00
CPCC04B35/10C04B35/622C04B35/638C04B35/63424C04B38/068B33Y70/10B33Y10/00C04B2235/425C04B2235/6562C04B2235/6567C04B2235/3418C04B2235/3281C04B2235/3244C04B2235/3232C04B2235/3225C04B2235/3208C04B2235/3206
Inventor 刘永胜李鹤刘岩松曾庆丰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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