Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Short carbon fiber reinforced Csf/SiC ceramic matrix composite material and preparation method thereof

A short carbon fiber and composite material technology, applied in the direction of additive processing, can solve the problems of poor mechanical properties of SiC and short carbon fiber damage, and achieve the effects of good orientation, easy control and excellent mechanical properties

Active Publication Date: 2020-09-15
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] for C sf In the conventional preparation method of SiC composites, short carbon fibers are damaged, it is difficult to prepare a uniform interface phase on the fiber surface, and the fibers are randomly distributed in the matrix, resulting in C sf / The technical problem of poor mechanical properties of SiC, the present invention adopts the 3D printing method to prepare the reinforcement body with directional arrangement of short carbon fibers, and then prepares a uniform interface and part of the SiC matrix on the surface of the short carbon fibers by chemical vapor infiltration method, and finally impregnates through the precursor- The pyrolysis (PIP) method completes the densification and finally obtains high-performance C sf / SiC Ceramic Matrix Composites

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Short carbon fiber reinforced Csf/SiC ceramic matrix composite material and preparation method thereof
  • Short carbon fiber reinforced Csf/SiC ceramic matrix composite material and preparation method thereof
  • Short carbon fiber reinforced Csf/SiC ceramic matrix composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Mix deionized water and ethanol evenly according to the volume ratio of 1:2, add 1wt% of methylcellulose, 5wt% of PVP and 20wt% of short carbon fibers (with a diameter of 1 μm to 7 μm and a length of 0.05 mm to 1 mm) ) and mix well;

[0048] (2) The solvent is volatilized under the condition of magnetic heating and stirring until the solid content of the mixed system reaches ~65wt%, and the viscosity reaches ~40Pa·s (shear rate is 100 / s), and the mixture is loaded into the barrel used for 3D printing;

[0049] (3) Using a 0.84mm needle, based on the following printing parameters: layer thickness 0.6mm, line spacing 0.6mm, pressure: 0.45MPa; speed 2.8mm / s, print a reinforcement with short carbon fiber orientation, and then place it at 50°C 24h drying in the oven;

[0050] (4) Debinding: heat preservation at 1200°C for 0.5h under the protection of argon, and the heating rate is 5°C / min;

[0051] (5) Preparation of the interface layer and part of the SiC matrix: the ...

Embodiment 2

[0055] Similar to the steps in Example 1, the difference is that in step (3), a 0.64 mm needle is used, and the printing parameters are set as: layer thickness 0.5 mm, spacing 0.5 mm.

[0056] Gained C in this embodiment 2 sf The short carbon fiber content in the / SiC composite material is 30vol%, the bending strength of the material is 376±12MPa, the compressive strength is 415±13MPa, and the fracture toughness is 8.9±0.20MPa m 1 / 2 .

Embodiment 3

[0058] Similar to the steps in Example 1, the difference is: in step (1), the addition of methylcellulose is 1.5wt%, and the addition of binder is 7wt%;

[0059] Gained C in this embodiment 3 sf The short carbon fiber content in the / SiC composite material is ~21vol%, the material bending strength is 365±11MPa, the compressive strength is 420±12MPa, and the fracture toughness is 8.4±0.20MPa m 1 / 2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a short carbon fiber reinforced Csf / SiC ceramic matrix composite material and a preparation method thereof. The preparation method of the short carbon fiber reinforced Csf / SiCceramic matrix composite material comprises the steps: (1) mixing short carbon fibers, a dispersing agent, a binder and a solvent to obtain short carbon fiber slurry; (2) carrying out 3D printing molding on the obtained short carbon fiber slurry to prepare a short carbon fiber directionally-arranged reinforcement; and (3) drying and degumming the obtained reinforcement, then preparing an interface phase and a part of SiC matrix, and finally, carrying out a densification process to obtain the short carbon fiber reinforced Csf / SiC ceramic matrix composite material.

Description

technical field [0001] The invention relates to a short carbon fiber reinforced C sf The invention discloses a SiC ceramic matrix composite material and a preparation method thereof, belonging to the technical field of ceramic matrix composite materials. Background technique [0002] Carbon Fiber Reinforced Silicon Carbide C f / SiC ceramic matrix composites have comprehensive properties such as low density, high strength, high temperature resistance and non-brittle fracture, and have attracted widespread attention from all over the world, and have broad application prospects in aerospace, energy and other fields. Compared with continuous fiber reinforced ceramic matrix composites, chopped fiber reinforced ceramic matrix composites have better performance designability, easy to obtain ceramic matrix with controllable composition and structure, and low cost. [0003] Short carbon fiber reinforced silicon carbide composites (C sf / SiC) is usually prepared by: mixing short ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/571C04B35/622B33Y70/10B33Y10/00
CPCB33Y10/00B33Y70/10C04B35/571C04B35/622C04B2235/483C04B2235/5248C04B2235/6026C04B2235/614C04B2235/96
Inventor 倪德伟卢俊董绍明廖春景杨金山阚艳梅丁玉生张翔宇
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com