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Beta-SiAlON ceramic with complex shape, and preparation method thereof

A complex shape, ceramic technology, applied in the field of complex shape β-SiAlON ceramics and its preparation, can solve problems such as the inability to meet the rapid prototyping and processing of complex components, the difficulty of forming complex structural ceramic materials, and the large processing volume, so as to avoid disasters. Fracture, material system convenience, the effect of increasing the work of fracture

Inactive Publication Date: 2019-06-18
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the deficiencies and shortcomings of the above-mentioned prior art, the present invention provides a preparation method of complex-shaped SiAlON ceramics, which solves the difficulty in forming ceramic materials with complex structures at the present stage. Meet the problems of rapid prototyping and processing of complex components

Method used

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  • Beta-SiAlON ceramic with complex shape, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A method for preparing complex-shaped β-SiAlON ceramic materials based on light-curing molding technology, comprising the following specific steps:

[0035] S1. Weigh EPTA, UDPA, PUA, and n-octanol respectively by mass fraction 25%: 20%: 25%: 30%, and mix them uniformly to obtain a premixed liquid, then weigh ceramic raw material powder (including nitriding Silicon, aluminum nitride and aluminum oxide, among them, the average particle size of silicon nitride is 750-900nm, 1000-1300nm; the average particle size of aluminum nitride is 800-950nm, 1000-1300nm; the average particle size of aluminum oxide is 700 ~ 850nm, 1100 ~ 1500nm) into the premix, and mix evenly to obtain ceramic slurry;

[0036] S2. Put the uniformly stirred ceramic slurry into an ultrasonic disperser for ultrasonic dispersion for 20-30 minutes, then put the ultrasonically dispersed ceramic slurry into a plastic tank, and ball mill for 2 hours at a speed of 350-400r / min ;

[0037]S3. Take out the ball...

Embodiment 2

[0042] The difference between this embodiment and Example 1 is that EPTA, UDPA, PUA, and n-octanol are weighed by mass fraction in the layered ceramic matrix composite material prepared by light curing technology, and the mass percentage is 25%: 20%: 25%: 30%, and mix the premix evenly.

Embodiment 3

[0044] The difference between this embodiment and Example 1-2 is that after converting the solid phase content of the ceramic particles into mass percentage, the mass fraction of the ceramic particles in the slurry is 50-70% (relative to the ceramic slurry).

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Abstract

The invention discloses a beta-SiAlON ceramic with a complex shape, and a preparation method thereof. The main crystal phase of the beta-SiAlON ceramic is beta-Si6-xAlxOxN8-x, wherein x is more than 0and not more than 4.2. The preparation method comprises the following steps: S1, EPTA, UDPA, PUA and n-octanol are mixed, and undergo ultrasonic treatment, ceramic powder is added, and the obtained mixture undergoes ball-milling; S2, the obtained ball-milled ceramic slurry is taken out and is placed in a 3D printer platform; S3, the 3D printer platform is rotated to make the ceramic slurry go through a scraper and form a flat slurry film, a needed complex shape ceramic model undergoes computer slicing treatment, and is output, and the flat slurry film is photocured to form a ceramic body; andS4, the ceramic body undergoes vacuum degreasing and air degreasing, and finally undergoes gas pressure sintering to obtain the beta-SiAlON ceramic with the complex shape. The preparation method hasthe advantages of simplicity in preparation, controllable process, convenience in adjustment of the material system, mass production, and suitableness for preparing ceramic matrix composite materialssuch as nitride ceramics.

Description

technical field [0001] The invention belongs to the technical field of ceramic material molding, and more specifically relates to a complex-shaped β-SiAlON ceramic and a preparation method thereof. Background technique [0002] With the rapid development of modern industrial technology, traditional materials can no longer meet the needs of various industrial sectors such as high-performance machinery manufacturing, precision electronic appliances, manned aerospace engineering, new clean energy, and fine chemicals. Therefore, it is urgent to develop new materials that can meet the stringent requirements of related industries for light weight, chemical corrosion resistance, high temperature resistance, and thermal shock resistance. Therefore, structural ceramic materials with excellent mechanical properties, high chemical stability, and corrosion resistance have attracted increasing attention. However, the inherent high brittleness and high hardness of ceramic materials limit...

Claims

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Application Information

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IPC IPC(8): C04B35/599C04B35/622B28B1/00B33Y10/00B33Y80/00
Inventor 伍尚华田卓杨玉平
Owner GUANGDONG UNIV OF TECH
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