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A preparation method of continuous fiber reinforced carbon/carbon-niobium composite material

A carbon composite material, continuous fiber technology, applied in the field of carbon/carbon-niobium composite material preparation

Active Publication Date: 2016-11-23
CENT SOUTH UNIV
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  • 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 reinforced carbon / carbon-niobium composites has not been reported in the relevant literature

Method used

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  • A preparation method of continuous fiber reinforced carbon/carbon-niobium composite material
  • A preparation method of 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 evenly on each layer of non-weft cloth and mesh tire, and lay 12 layers of non-weft cloth and mesh tire layer by layer, and needle-puncture to prepare carbon fiber prefabricated body, 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 through CVI 3 , control the pyrolytic carbon microstructure of the matrix to rough layer structure pyrolytic carbon; machine it 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-press it with a force of 5KN to keep the surface of the sample smooth.

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

Embodiment 2

[0051] (1) Lay niobium powder with a particle size of 100-140 microns evenly on each layer of non-weft cloth and mesh tire, and lay 15 layers of non-weft cloth and mesh tire layer by layer, and needle-punched to prepare carbon fiber prefabricated body, control 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 through CVI 3 , control the pyrolytic carbon microstructure of the matrix to rough layer structure pyrolytic carbon; machine it 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-press it with a force of 5KN to keep the surface of the sample smooth.

[0053] (3) Using SPS furnace, vacuumize to 10 -2 After Pa, the carbon / carbon-niobium composite material is rapidly heated to a temperature of 1720°C, then slowly pressurized to a pressure of 33MPa, the temperature rise rate is controlled to be 160°C / min, an...

Embodiment 3

[0056] (1) Lay niobium powder with a particle size of 100-140 microns evenly on each layer of non-weft cloth and mesh tire, and lay 14 layers of non-weft cloth and mesh tire layer by layer, and needle-punched to prepare carbon fiber prefabricated body, control 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 through CVI 3 , control the pyrolytic carbon microstructure of the matrix to rough layer structure pyrolytic carbon; machine it 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-press it with a force of 5KN to keep the surface of the sample smooth.

[0058] (3) Using SPS furnace, vacuumize to 10 -2 After Pa, the carbon / carbon-niobium composite material is rapidly heated to a temperature of 1670°C, then slowly pressurized to a pressure of 31MPa, the temperature rise rate is controlled to be 140°C / min, an...

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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, it has a remarkable feature of low density. Niobium has a low capture cross section for thermal neutrons and good corrosion resistance. It is used in nuclear energy, aerospace and other fields widely. However, as a metal material, niobium has a sharp decline 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, which has particularly excellent high-temperature mechanical properties. Its mechanical properties above 2000 ° C are equivalent to those at room temperature. The d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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