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

A CVI densification method for ceramic matrix composite parts with large wall thickness

A composite material and ceramic-based technology, which is applied in the field of composite material densification treatment, can solve the problem that parts are not easy to deposit, and achieve the effect of uniform internal density and good mechanical properties.

Active Publication Date: 2022-05-13
XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem in the prior art that the interior of ceramic matrix composite parts with large wall thickness is not easy to deposit, and to provide a CVI densification method for ceramic matrix composite parts with large wall thickness

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Carry out CVI deposition on the part, when the density of the part reaches 1.55g / cm 3 Before, the traditional deposition process is used for preparation; when the density of the part reaches 1.57g / cm 3 After it is out of the oven, the parts are roughly machined, the excess parts of the parts are removed, and diversion holes with a diameter of 1mm are opened in the thickness direction of the parts. The diversion holes are through holes, and the distance between the diversion holes is 10mm;

[0021] 2) After the diversion hole is opened, continue to carry out CVI deposition on the parts, deposit 120 hours out of the furnace, polish the surface of the part, remove the hard layer of silicon carbide deposited on the surface of the part, and the surface of the part does not expose fibers, and then use a drill to drill the step 1) The diversion hole is drilled through;

[0022] 3) Repeat step 2) until the density of the part reaches 1.84g / cm 3 Finally, use the carbon fibe...

Embodiment 2

[0028] 1) Carry out CVI deposition on the part, when the density of the part reaches 1.55g / cm 3 Before, the traditional deposition process is used for preparation; when the density of the part reaches 1.59g / cm 3 After it is out of the oven, the parts are roughly machined, the excess parts of the parts are removed, and diversion holes with a diameter of 1.5mm are opened in the thickness direction of the parts. The diversion holes are through holes, and the distance between the diversion holes is 15mm;

[0029] 2) After the diversion hole is opened, continue to carry out CVI deposition on the parts, deposit 120 hours out of the furnace, polish the surface of the part, remove the hard layer of silicon carbide deposited on the surface of the part, and the surface of the part does not expose fibers, and then use a drill to drill the step 1) The diversion hole is drilled through;

[0030] 3) Repeat step 2) until the density of the part reaches 1.87g / cm 3 Finally, use the carbon fi...

Embodiment 3

[0036] 1) Carry out CVI deposition on the part, when the density of the part reaches 1.55g / cm 3 Before, the traditional deposition process is used for preparation; when the density of the part reaches 1.6g / cm 3 After it is out of the oven, the parts are roughly machined, the excess parts of the parts are removed, and diversion holes with a diameter of 1.8mm are opened in the thickness direction of the parts. The diversion holes are through holes, and the distance between the diversion holes is 18mm;

[0037] 2) After the diversion hole is opened, continue to carry out CVI deposition on the parts, deposit 120 hours out of the furnace, polish the surface of the part, remove the hard layer of silicon carbide deposited on the surface of the part, and the surface of the part does not expose fibers, and then use a drill to drill the step 1) The diversion hole is drilled through;

[0038] 3) Repeat step 2) until the density of the part reaches 1.83g / cm 3 Finally, use the carbon fib...

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
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a composite material densification treatment technology, in particular to a CVI densification method for large-wall-thickness ceramic-matrix composite parts, so as to solve the difficulty of deposition inside the large-wall-thickness ceramic-matrix composite parts existing in the prior art The problem. The technical solution adopted is to carry out CVI deposition on the parts. During the deposition process, when the density of the parts reaches a certain range, the following steps are carried out respectively, including opening diversion holes in the thickness direction of the parts, polishing the surface of the parts, drilling through the diversion holes, sealing Blocking the diversion hole, etc., the finally obtained part density reaches the standard, the internal deposition is uniform, and the mechanical properties are good.

Description

technical field [0001] The invention relates to a composite material densification treatment technology, in particular to a CVI densification method for a ceramic matrix composite material part with a large wall thickness. Background technique [0002] Ceramic matrix composite material is a new thermal structure / function integrated material with the advantages of metal materials, ceramic materials and carbon materials. It has high temperature resistance, low density, high specific strength, high specific modulus, oxidation resistance and ablation resistance. , Insensitivity to cracks, no catastrophic damage and other characteristics, it has a wide range of applications in machinery, aerospace, nuclear, energy and other fields. Different use environments have different requirements for the wall thickness of ceramic matrix composites. Generally, the wall thickness of ceramic matrix composites is 2-4mm. The CVI process is relatively smooth and the internal deposition quality is...

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): C04B35/80C04B35/81C04B35/84C04B35/565
CPCC04B35/565C04B2235/5248C04B2235/77
Inventor 杨云云卜石陈旭马渊赵兵兵李建章成来飞
Owner XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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