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Hollow blade easy-to-remove aluminum oxide ceramic core and preparation method thereof

A technology of alumina ceramics and hollow blades, which is applied in cores, casting molding equipment, casting molds, etc., can solve the problems of high cost, unsuitable for mass production, and complicated manufacturing process of core rods, and achieves increased contact area. , The effect of shortening the core removal time and saving ceramic materials

Active Publication Date: 2020-02-11
武汉因泰莱激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacturing process of the mandrel rod used in the method is complicated, the cost is high, and holes need to be reserved for assembly and disassembly, which is not suitable for large-scale production

Method used

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  • Hollow blade easy-to-remove aluminum oxide ceramic core and preparation method thereof
  • Hollow blade easy-to-remove aluminum oxide ceramic core and preparation method thereof
  • Hollow blade easy-to-remove aluminum oxide ceramic core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The specific implementation steps of the ceramic core made of alumina ceramic paste using 3D printing molding technology are as follows:

[0049] 1) Take 40g of alumina, 200ml of absolute ethanol and 0.4g of organosilicate and mix and stir for 10h.

[0050] 2) filtering and drying to prepare surface-functionalized graded alumina ceramic powder.

[0051] 3) Take 10g of silicon dioxide, 100ml of absolute ethanol and 0.2g of organosilicate and mix and stir for 10h.

[0052] 4) Filtrating and drying to prepare surface-functionalized graded silica ceramic powder.

[0053] 5) Mix 100ml of acrylic resin with an average molecular weight of 2500, 120ml of butyl acrylate, 20ml of methyl benzoylformate and 10ml of polydimethylsiloxane to prepare a photocurable resin premix.

[0054] 6) Mixing and stirring the graded alumina ceramic powder and the photocurable resin premix to obtain a photocurable ceramic slurry.

[0055] 7) Create a ceramic core model entity in the 3D modeling ...

Embodiment 2

[0072] The specific implementation steps of the ceramic core made of alumina ceramic paste using 3D printing molding technology are as follows:

[0073] 1) Take 35g of alumina, 200ml of absolute ethanol and 0.3g of organosilicate and mix and stir for 10h.

[0074] 2) filtering and drying to prepare surface-functionalized graded alumina ceramic powder.

[0075] 3) Take 8g of silicon dioxide, 120ml of absolute ethanol and 0.2g of organosilicate and mix and stir for 10h.

[0076] 4) Filtrating and drying to prepare surface-functionalized graded silica ceramic powder.

[0077] 5) Mix 100ml of acrylic resin with an average molecular weight of 2000, 120ml of butyl acrylate, 20ml of methyl benzoylformate and 10ml of polydimethylsiloxane to prepare a photocurable resin premix.

[0078] 6) Mixing and stirring the graded alumina ceramic powder and the photocurable resin premix to obtain a photocurable ceramic slurry.

[0079] 7) Create a ceramic core model entity in the 3D modeling s...

Embodiment 3

[0094] The specific implementation steps of the ceramic core made of alumina ceramic paste using 3D printing molding technology are as follows:

[0095] 1) Take 45g of alumina, 220ml of absolute ethanol and 0.3g of organosilicate and mix and stir for 10h.

[0096] 2) filtering and drying to prepare surface-functionalized graded alumina ceramic powder.

[0097] 3) Take 12g of silicon dioxide, 120ml of absolute ethanol and 0.3g of organosilicate and mix and stir for 10h.

[0098] 4) Filtrating and drying to prepare surface-functionalized graded silica ceramic powder.

[0099] 5) Mix 110ml of acrylic resin with an average molecular weight of 2500, 135ml of butyl acrylate, 25ml of methyl benzoylformate and 12ml of polydimethylsiloxane to prepare a photocurable resin premix.

[0100] 6) Mixing and stirring the graded alumina ceramic powder and the photocurable resin premix to obtain a photocurable ceramic slurry.

[0101] 7) Create a ceramic core model entity in the 3D modeling ...

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Abstract

The invention provides a hollow blade easy-to-remove aluminum oxide ceramic core and a preparation method thereof. According to the ceramic core, a shell and a space lattice structure in the shell arecombined, and when the relative density of the space lattice structure is 20 to 50 percent and the thickness of the shell is 0.4 to 0.5 mm, high void ratio of the ceramic core is realized and the deflection and the bending resistance of the ceramic core are guaranteed; and according to the preparation method, stable printing is facilitated by high flowability and low viscosity of ceramic slurry,the properties of the ceramic core are improved well by cooperating with the space lattice structure, the ceramic slurry is printed into a needed forming green body by 3D printing equipment, and the formed ceramic core is obtained by degreasing and sintering the formed green body. The ceramic core has high strength and short core removing time, saves ceramic materials, shortens process flow and provides an efficient solution for the problem about removal of the aluminum oxide ceramic core.

Description

technical field [0001] The invention belongs to the field of high-temperature alloy hollow vane processing and manufacturing, and in particular relates to a hollow vane easily-removable alumina ceramic core and a preparation method thereof. Background technique [0002] The continuous upgrading of the thrust-to-weight ratio of industrial engines such as aerospace, ships and electric power has higher and higher requirements for the thermal efficiency of gas turbines. Increasing the gas inlet temperature is an important way to improve the thermal efficiency of gas turbines. With the continuous increase of gas inlet temperature, improving the temperature bearing capacity of blades simply by improving the preparation materials of blades can no longer meet the actual use needs. Therefore, it is becoming more and more important to produce hollow blades with air-cooled inner channels by presetting ceramic cores. Key technologies for advanced gas turbine manufacturing. [0003] Com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/04B33Y10/00B33Y80/00
CPCB22C7/02B22C9/04B33Y10/00B33Y80/00
Inventor 蔡志祥李洋王志勇孙智龙廖晓泉谢密
Owner 武汉因泰莱激光科技有限公司
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