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

Preparation method for sharp leading edge

A leading edge and sharp technology, applied in the field of sharp leading edge preparation, can solve the problems of difficult weaving sharp leading edge, fiber breakage, needle drop, etc., and achieve the effect of improving erosion resistance, eliminating heat flow concentration, and eliminating influence

Inactive Publication Date: 2014-07-23
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When preparing the protective layer on the sharp leading edge, it is difficult to weave the sharp leading edge with the ordinary weaving structure. Fiber breakage and needle drop will occur on the leading edge surface during processing and forming, and tiny protrusions and pits will be formed on the leading edge surface. Pneumatic heating causes huge heat flow concentration, resulting in severe ablation

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
  • Preparation method for sharp leading edge
  • Preparation method for sharp leading edge
  • Preparation method for sharp leading edge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The leading edge radius is 1.5mm, and the inner core material is a three-dimensional acupuncture C / SiC sharp C / SiC-ZrC leading edge. The preparation steps are as follows:

[0030] Mold preparation: Use graphite material to process the mold according to the design drawing of the front edge. The radius of the front edge of the male mold is R0.5mm, the radius of the inner surface of the female mold is R1.5mm, and the corresponding position of the male mold and female mold has a circular hole with a diameter of 5mm. The leading edge radius is evenly distributed under 15mm from the top.

[0031] Preparation of two-dimensional laminated protective layer: Spread 5 layers of carbon fiber cloth evenly on the surface of the male mold, and firmly stitch the carbon cloth with fibers through the holes reserved on the mold. Using CVI process, propylene is pyrolyzed at 960°C to deposit pyrolytic carbon interface phase on the surface of carbon fiber, and MTS is loaded into the deposition fu...

Embodiment 2

[0036] The leading edge radius is 2mm, and the inner core material is a C / SiC leading edge of 3D needled C / SiC. The preparation steps are as follows:

[0037] Mold preparation: Use graphite material to process the mold according to the design drawing of the front edge. The radius of the front edge of the male mold is R1mm, the radius of the inner surface of the female mold is R2mm, and the corresponding position of the male mold and female mold has a circular hole with a diameter of 5mm, and the distance from the top of the front edge radius Evenly distributed under 15mm.

[0038] Preparation of two-dimensional laminated protective layer: Spread 5 layers of carbon fiber cloth evenly on the surface of the male mold, and firmly stitch the carbon cloth with fibers through the holes reserved on the mold. Using CVI process, propylene is pyrolyzed at 960°C to deposit pyrolytic carbon interface phase on the surface of carbon fiber, and MTS is loaded into the deposition furnace with hydrog...

Embodiment 3

[0043] The leading edge radius is 1.5mm, and the inner core material is a C / SiC sharp leading edge with 3D piercing C / SiC. The preparation steps are as follows:

[0044] Mold preparation: Use graphite material to process the mold according to the design drawing of the front edge. The radius of the front edge of the male mold is R0.5mm, the radius of the inner surface of the female mold is R1.5mm, and the corresponding position of the male mold and female mold has a circular hole with a diameter of 5mm. The leading edge radius is evenly distributed under 15mm from the top.

[0045] Preparation of two-dimensional laminated protective layer: Spread 5 layers of carbon fiber cloth evenly on the surface of the male mold, and firmly stitch the carbon cloth with fibers through the holes reserved on the mold. Using CVI process, propylene is pyrolyzed at 960°C to deposit pyrolytic carbon interface phase on the surface of carbon fiber, and MTS is loaded into the deposition furnace with hydrog...

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
Densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method for a sharp leading edge possessing a fiber prefabricated body inner core surface coated with a two-dimension laminated carbon-fiber protection layer. The two-dimension laminated carbon-fiber protection layer is used to coat the prefabricated body inner core, so that local hot-fluid concentration of the prefabricated body inner core caused by fiber cracking and needle dropping because of mechanic processing is eliminated, and the erosion-corrosion resistant performance of the prepared composite material sharp leading edge is improved. Because the fiber prefabricated body inner core surface is coated with the two-dimension laminated carbon-fiber protection layer, the protection layer is tightly attached to the processed prefabricated body inner core, the protection layer does not need mechanical processing, the surface is complete and has no tiny projections and depressions, and by taking the protection layer surface as the radial surface of the sharp leading edge, the influence on aerodynamic heating caused by needle dropping and fiber cracking of the prefabricated body inner core is eliminated, and the prepared composite material sharp leading edge has good erosion-corrosion resistant performance.

Description

Technical field [0001] The invention relates to a method for preparing a sharp front edge with a two-dimensional laminated carbon fiber protective layer covering the surface of a fiber preform inner core, which improves the anti-erosion and erosion performance of the prepared sharp front edge of a composite material serving in a high-temperature environment. Background technique [0002] Continuous fiber toughened silicon carbide composite (C / SiC) is an ideal high-temperature structural material. It has a series of advantages such as high temperature resistance, low density, high strength, and thermal shock resistance. It has a wide range of application prospects in the aviation and aerospace fields. . By modifying the matrix and introducing different high-temperature phases, the high-temperature ablation resistance of C / SiC can be greatly improved, and its service life and quality under severe aerodynamic heating environment can be improved. [0003] There are many kinds of prefo...

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
IPC IPC(8): C04B35/80C04B35/565C04B35/56C04B35/622
Inventor 王一光刘俊朋罗磊段刘阳张立同成来飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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