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Preparation method of SiCW/SiC/SiC ceramic-based composite material

A composite material and ceramic matrix technology, which is applied in the field of preparation of SiC ceramic matrix composite materials, can solve the problems of high brittleness and large porosity, and achieve the effect of shortening the molding time.

Inactive Publication Date: 2018-07-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of large porosity and high brittleness after post-processing of 3D printed ceramic molding specimens, and to provide a SiC W Preparation method of / SiC / SiC ceramic matrix composite material

Method used

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  • Preparation method of SiCW/SiC/SiC ceramic-based composite material
  • Preparation method of SiCW/SiC/SiC ceramic-based composite material

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Experimental program
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specific Embodiment approach 1

[0017] Specific implementation mode 1: a SiC in this implementation mode W The preparation method of / SiC / SiC ceramic matrix composite material is carried out as follows:

[0018] 1. Mix SiC powder and binder powder in a V-type mixer to obtain a uniformly mixed composite powder, and then dry it in a constant temperature drying box to obtain a dried composite powder; add the dried composite powder to In the 3D printer material box, lay flat;

[0019] 2. Drawing SiC W / SiC / SiC ceramic matrix composite 3D model, and then convert it to STL format file;

[0020] 3. Import the STL format file into the 3D printing software, set the layer thickness, filling speed, contour speed, filling distance, filling power, contour power, heating temperature; then start the equipment, prepare the embryo body, and then lower the embryo body to room temperature, Take it out for powder cleaning;

[0021] 4. Put the powder-cleaned embryo body into a high-temperature sintering furnace for high-temp...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the particle size of the SiC powder and binder powder in step 1 is 4-6 μm, and the others are the same as Embodiment 1.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass percentage of the binder powder in the composite powder in step 1 is 3-5%, and the others are the same as Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a SiCW / SiC / SiC ceramic-based composite material. The invention relates to the preparation method of the SiCW / SiC / SiC ceramic-based composite material and aims to solve the problem that the porosity is large and the brittleness is high after the post-treatment of a 3D-printed ceramic formed test piece. The method comprises the following steps: mixingSiC powder with binder powder to prepare a ceramic blank, drawing a three-dimensional model of the SiCW / SiC / SiC ceramic-based composite material, setting parameters of a 3D printer, then performing high-temperature degreasing treatment, and repeatedly performing infiltration and pyrolysis until the weight is no longer increased, so as to obtain the ceramic-based composite material. According to the invention, the effects of compactness and toughening are achieved, the porosity is only 8.5%, and the strength and toughness of the ceramic-based composite material are improved. The preparation method is applied to the field of SiC ceramic-based composite material preparation.

Description

technical field [0001] The invention relates to a preparation process of a SiC ceramic matrix composite material, in particular to a SiC W / SiC / SiC ceramic matrix composite material preparation method. Background technique [0002] SiC ceramic materials not only have excellent properties such as high strength, high hardness, oxidation resistance, wear resistance, and chemical corrosion resistance, but also have the advantages of high temperature thermal stability, small thermal expansion coefficient, and high thermal conductivity. They are considered to be new energy sources in the 21st century. One of the most promising candidate materials for high-temperature components in fields such as aerospace and aerospace. However, its high strength and high hardness bring great difficulties to processing. Traditional ceramic processing technologies such as slip casting, dry pressing, isostatic pressing, gel injection molding, powder metallurgy and other technologies generally have...

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Application Information

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IPC IPC(8): C04B35/565B33Y10/00B33Y50/00
CPCB33Y10/00B33Y50/00C04B35/565C04B35/571C04B2235/96
Inventor 曾涛张坤周义凯
Owner HARBIN UNIV OF SCI & TECH