Preparation method for continuous fiber-reinforced carbon/carbon-niobium composite material

A technology of carbon composite materials and continuous fibers, applied in the field of preparation of carbon/carbon-niobium composite materials

Active Publication Date: 2015-04-29
CENT SOUTH UNIV
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using CVI combined with spark plasma sintering (SPS) to prepare continuous fiber...

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 continuous fiber-reinforced carbon/carbon-niobium composite material
  • Preparation method for continuous fiber-reinforced carbon/carbon-niobium composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Lay niobium powder with a particle size of 100-140 microns on each layer of latitude cloth and mesh respectively, and layer 12 layers of latitude cloth and mesh one by one, needle punching and hooking to prepare carbon fiber preform, control The initial density of the preform is 0.83g / cm 3 , The mass fraction of niobium in the preform is 40%;

[0047] (2) Densify the preform to 1.00g / cm by CVI 3 , Control the microstructure of the matrix pyrolytic carbon to rough layer structure pyrolytic carbon; machined into a workpiece with a diameter of 40mm and a height of 10mm, put it into the graphite mold of the SPS furnace, and pre-compression molding with a force of 5KN to keep the sample surface smooth.

[0048] (3) Using SPS furnace, vacuum to 10 -2 After Pa, the carbon / carbon-niobium composite material is quickly heated to a temperature of 1700°C, then slowly pressurized to a pressure of 31MPa, and the heating rate is controlled to be 120°C / min and the pressurizing rate to b...

Embodiment 2

[0051] (1) Lay niobium powder with a particle size of 100-140 microns on each layer of latitude cloth and mesh, and layer 15 layers of latitude cloth and mesh, and needle-punching to prepare a carbon fiber preform. The initial density of the preform is 0.91g / cm 3 , The mass fraction of niobium in the preform is 45%;

[0052] (2) Densify the preform to 1.09g / cm by CVI 3 , Control the microstructure of the matrix pyrolytic carbon to rough layer structure pyrolytic carbon; machined into a workpiece with a diameter of 40mm and a height of 10mm, put it into the graphite mold of the SPS furnace, and pre-compression molding with a force of 5KN to keep the sample surface smooth.

[0053] (3) Using SPS furnace, vacuum to 10 -2 After Pa, the carbon / carbon-niobium composite material is quickly heated to a temperature of 1720°C, then slowly pressurized to a pressure of 33MPa, and the heating rate is controlled to 160°C / min and the pressurizing rate to 0.9MPa / min;

[0054] (4) Keep heat preserva...

Embodiment 3

[0056] (1) Lay niobium powder with a particle size of 100-140 microns on each layer of latitude cloth and mesh, and layer 14 layers of latitude cloth and mesh, and needle-punching to prepare a carbon fiber preform. The initial density of the preform is 1.00g / cm 3 , The mass fraction of niobium in the preform is 50%;

[0057] (2) Densify the preform to 1.20g / cm by CVI 3 , Control the microstructure of the matrix pyrolytic carbon to rough layer structure pyrolytic carbon; machined into a workpiece with a diameter of 40mm and a height of 10mm, put it into the graphite mold of the SPS furnace, and pre-compression molding with a force of 5KN to keep the sample surface smooth.

[0058] (3) Using SPS furnace, vacuum to 10 -2 After Pa, the carbon / carbon-niobium composite material is quickly heated to a temperature of 1670°C, then slowly pressurized to a pressure of 31MPa, and the heating rate is controlled to be 140°C / min and the pressurizing rate to be 1MPa / min;

[0059] (4) Keep heat pres...

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
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for a continuous fiber-reinforced carbon/carbon-niobium composite material. The method comprises the following steps: (1), uniformly dispersing niobium powder on the surface of each layer of carbon fiber web and carbon fiber non-woven cloth to obtain carbon fiber web layers and carbon fiber non-woven cloth layers with niobium powder; then crosswise laying and weaving the obtained carbon fiber web layers and carbon fiber non-woven cloth layers with the niobium powder layer by layer to obtain a niobium-containing carbon fiber preform; (2), performing pyrolytic carbon deposition on the niobium-containing carbon fiber preform obtained in step (1) in a deposition furnace to obtain a niobium-containing carbon/carbon composite blank with pyrolytic carbon, wherein the pyrolytic carbon is pyrolytic carbon with a rough laminar microstructure, and the temperature is controlled to be 1,100 to 1,150 DEG C when the pyrolytic carbon is deposited; (3), heating the niobium-containing carbon/carbon composite blank to 1,670 to 1,720 DEG C in an SPS furnace, applying pressure, and preserving heat and pressure to obtain the continuous fiber-reinforced carbon/carbon-niobium composite material under a pressure condition.

Description

Technical field [0001] The invention relates to a method for preparing a carbon / carbon-niobium composite material, in particular to a method for preparing a continuous fiber reinforced carbon / carbon-niobium composite material Background technique [0002] Niobium is a refractory metal with a melting point of 2468°C. Compared with other refractory metals, niobium has the obvious characteristics of low density. Niobium has a low thermal neutron capture section and good corrosion resistance. It is used in nuclear energy, aerospace and other fields. widely. However, as a metal material, niobium has a sharp drop in its mechanical properties at high temperatures when the temperature exceeds about 900°C. The carbon / carbon composite material is an advanced composite material with carbon fiber reinforced carbon matrix. It has particularly excellent high-temperature mechanical properties. Its mechanical properties above 2000 ℃ are equivalent to those at room temperature, and it is current...

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): C22C47/14C22C101/10
Inventor 张福勤王星星郑吉祥刘怡黎炳前
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap