Photocuring 3D printing silicon-based ceramic core and preparation method thereof

Abstract

The invention relates to a photocuring 3D printing silicon-based ceramic core and a preparation method thereof, and relates to the field of additive manufacturing ceramic materials. According to the main technical scheme, the preparation method of the photocuring 3D printing silicon-based ceramic core comprises the following steps: 1) preparing photocuring 3D printing ceramic core slurry; wherein the light-cured 3D printing ceramic core slurry is prepared from the following components in parts by weight: 30 to 50 parts of silicon dioxide skeleton powder, 20 to 50 parts of filler, 10 to 15 parts of through hole agent and 15 to 30 parts of light-cured resin premixed liquid, the through hole agent is formed by coating organic fibers with organic siloxane; 2) performing photocuring 3D printing treatment on the photocuring 3D printing ceramic slurry through photocuring 3D printing equipment to obtain a silicon-based ceramic core biscuit; and 3) degreasing and sintering the silicon-based ceramic core biscuit to obtain the photocuring 3D printing silicon-based ceramic core. The method is mainly used for improving the open porosity of the silicon-based ceramic core on the basis of ensuring that the silicon-based ceramic core has relatively high strength.

Description

technical field [0001] The invention relates to the technical field of additively manufactured ceramic materials, in particular to a light-cured 3D printing silicon-based ceramic core and a preparation method thereof. Background technique [0002] With the development of turbine blades, the preparation process of ceramic cores is also developing, and the emergence of high-efficiency air-cooled hollow blades makes the preparation of ceramic cores a key technology. As the internal cooling channels of hollow air-cooled blades become more and more complex, the wall thickness of the blades becomes thinner, the structure of the ceramic core is more complex, and the dimensional accuracy of the core is required to be higher, this poses a huge challenge to the preparation technology of the ceramic core. challenge. [0003] The preparation process of the traditional ceramic core requires a large number of molds, which makes the preparation cost high, the cycle time is long, the proce...

AI Technical Summary

Problems solved by technology

At present, the main method is to control the degree of sintering between ceramic particles through the degreasing-sintering process, thereby controlling the strength and open porosity of the core; however, this method cannot ensure the strength of the core. High open porosity of the core

In addition, there is also a method of presetting the mandrel rod in the core, through which the coating around the mandrel rod is easily corroded, creating a gap between the mandrel and the ceramic, and enhancing the dissolution and loss of the ceramic core; however, this The process of this method is complex, the process stability is poor, and the operation is difficult

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