Photocuring 3D printing silicon nitride ceramic precursor and preparation and forming method thereof

Abstract

The invention discloses a photocuring 3D printing silicon nitride ceramic precursor and a preparation and forming method thereof. The photocuring 3D printing silicon nitride ceramic precursor is prepared from a monomer, a photoinitiator, a ceramic precursor prepolymer and a light absorber, wherein the monomer is one or more from 1, 6 hexanediol diacrylate, isocyano ethyl methacrylate and ethylene1, 2-dithiocyanate; the ceramic precursor prepolymer is a polysilazane resin containing methyl, vinyl or sulfydryl groups; the photoinitiator is 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide, IRGACURE 819 or benzoin dimethyl ether, the curing performance of the ceramic precursor is good, and the ceramic precursor is relatively simple to prepare and form.

Description

technical field [0001] The invention belongs to the field of additive manufacturing in mechanical manufacturing, and relates to a light-cured 3D printing silicon nitride ceramic precursor, its preparation and forming method. Background technique [0002] Silicon nitride ceramics have high mechanical strength, good thermal stability, small thermal expansion coefficient, good thermal conductivity, oxidation resistance, wear resistance and corrosion resistance, so they are widely used in machinery industry, metallurgical industry, electronics, aerospace and In the military, such as high-temperature engineering components, such as aircraft engines, new ceramic cutters, ball valves, pump bodies, etc. However, due to its high hardness and high brittleness, defects are prone to occur during the production process, and there are many factors affecting the forming accuracy, making the complex structure more difficult to form and process. Traditional processing methods such as isosta...

AI Technical Summary

Problems solved by technology

The pyrolysis method of the precursor solves the scattering effect of the incident ultraviolet light, so that the photocuring 3D printing technology can form complex structures of high refractive index ceramics, such as SiC ceramics, Si 3 N 4 Ceramics, however, the poor curing performance of existing ceramic precursors seriously affects the development of the industry

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