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

Surface coating system of fiber reinforced ceramic matrix composite and its preparation method

A composite material and fiber reinforced technology, which is applied in the field of high temperature resistant fiber reinforced ceramic matrix composite materials, can solve the problems of loss, insufficient density of yttrium silicate coating and low preparation efficiency.

Active Publication Date: 2017-12-15
NAT UNIV OF DEFENSE TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of these schemes are: (1) The density of the yttrium silicate coating itself is not enough, and the oxygen in the Y 2 o 3 and SiO 2 The diffusion coefficients in are very low, but if the coating itself is not dense enough, this advantage will be lost a lot
Although this solution can avoid the problem of cracking or peeling off of the yttrium silicate outer coating caused by the oxidation of the SiC inner coating, it also exposes some shortcomings: (1) Due to the limitation of the sol synthesis technology, it is currently impossible to directly synthesize Stone stoichiometric ratio (Al 2 o 3 / SiO 2 Al with a mass ratio of 2.13:1 to 3.55:1) 2 o 3 -SiO 2 Sol, currently available Al of sol 2 o 3 / SiO 2 The highest mass ratio is only 2:1, and the conversion is surplus SiO 2 of mullite, these surplus SiO 2 Above 1450°C, it will cause carbothermal reduction reaction with free carbon in the composite material and destroy the coating. In an environment with high temperature water vapor, there will be a surplus of SiO 2 It also reacts to form gaseous Si(OH) 4 And rapid loss; (2) affected by Al 2 o 3 -SiO 2 Due to the influence of sol film-forming properties, cohesiveness and solid content, the density and adhesion of mullite coating are not ideal enough, and the preparation efficiency is low

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
  • Surface coating system of fiber reinforced ceramic matrix composite and its preparation method
  • Surface coating system of fiber reinforced ceramic matrix composite and its preparation method
  • Surface coating system of fiber reinforced ceramic matrix composite and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A kind of high temperature and anti-oxidation surface coating system of the present invention, such as figure 1 shown. The surface coating system is arranged on the surface of a C / C composite material substrate, and includes a SiC inner coating, a mullite intermediate layer and an yttrium silicate outer coating arranged sequentially from bottom to top.

[0073] In this embodiment, the thickness of the SiC coating is 20 μm; in the chemical composition of the mullite coating, Al 2 o 3 with SiO 2 The mass ratio is 2.13:1, the thickness of the mullite coating is 60 μm; the yttrium silicate coating is Y 2 Si 2 o 7 Single-phase coating with a single layer thickness of 80 μm.

[0074] A preparation method of the C / C composite material surface coating system of the above-mentioned present embodiment, comprising the following steps:

[0075] S1. Raw materials for preparing SiC coating slurry: according to the SiC powder / silicone resin volume ratio of 1:3 (the density of t...

Embodiment 2

[0095] A kind of high temperature and anti-oxidation surface coating system of the present invention, such as figure 1 shown. The surface coating system is arranged on the surface of a SiC / SiC composite material substrate, including a SiC layer, a mullite coating and an yttrium silicate coating arranged sequentially from bottom to top.

[0096] In this embodiment, the thickness of the SiC coating is 50 μm; in the chemical composition of the mullite coating, Al 2 o 3 with SiO 2 The mass ratio is 3.55:1, the thickness of the mullite coating is 50 μm; the yttrium silicate coating is Y 2 SiO 5 Single-phase coating with a single layer thickness of 50 μm.

[0097] A kind of preparation method of the composite material surface coating system of above-mentioned present embodiment, comprises the following steps:

[0098] S1. Raw materials for preparing SiC coating slurry: SiC powder / silicone resin volume ratio 1: 1.5 (the density of the silicone resin used in this embodiment is 1...

Embodiment 3

[0118] A kind of high temperature and anti-oxidation surface coating system of the present invention, such as figure 1 shown. The surface coating system is arranged on the surface of a C / SiC composite material substrate, and includes a SiC inner coating, a mullite intermediate layer and an yttrium silicate outer coating arranged sequentially from bottom to top.

[0119] In this embodiment, the thickness of the SiC coating is 40 μm; in the chemical composition of the mullite coating, Al 2 o 3 with SiO 2 The mass ratio is 2.55:1, the thickness of the mullite coating is 50 μm; the yttrium silicate coating is 70wt% Y 2 Si 2 o 7 +30wt%Y 2 SiO 5 Mixed-phase single-layer coating with a single-layer thickness of 100 μm.

[0120] A kind of preparation method of the composite material surface coating system of above-mentioned present embodiment, comprises the following steps:

[0121] S1. Raw materials for preparing SiC coating slurry: according to the SiC powder / silicone resin...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a surface coating system of a fiber-reinforced ceramic matrix composite material. The surface coating system is arranged on the substrate surface of the fiber-reinforced ceramic matrix composite material. The surface coating system includes SiC coating, Mo Stone coating and yttrium silicate coating. The preparation method includes preparation of mud raw material for SiC coating, preparation of mud raw material for mullite coating, preparation of mud raw material for yttrium silicate coating, preparation of SiC coating, preparation of mullite coating, preparation of yttrium silicate coating and other steps. The surface coating system used in the fiber-reinforced ceramic matrix composite material of the present invention has the advantages of high density, high temperature resistance, oxidation resistance and the like.

Description

technical field [0001] The invention relates to the field of high temperature resistant fiber-reinforced ceramic matrix composite materials, relates to a surface coating system of fiber-reinforced ceramic matrix composite materials and a preparation method thereof, in particular to a new type of coating for protecting C / SiC, SiC / SiC, C A three-layer high-temperature-resistant and anti-oxidation coating for composite materials such as / C and a preparation method thereof. Background technique [0002] Fiber-reinforced ceramic matrix composite materials represented by carbon fiber-reinforced silicon carbide (C / SiC), silicon carbide fiber-reinforced silicon carbide (SiC / SiC), and carbon fiber-reinforced carbon (C / C) composite materials have high specific strength and specific modulus It is considered as a strategic thermal structural material and has broad application prospects in aerospace, transportation, energy, chemical and other fields. [0003] As thermal structural mater...

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 Patents(China)
IPC IPC(8): C04B41/89
Inventor 马青松
Owner NAT UNIV OF DEFENSE TECH
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