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Pyrolytic carbon interface phase, preparation method and application thereof, carbon fiber reinforced silicon carbide ceramic-based composite material and preparation method thereof

A technology of silicon carbide ceramic matrix and silicon carbide ceramics, which is applied in the field of carbon fiber reinforced silicon carbide ceramic matrix composite materials and its preparation, pyrolytic carbon interface phase and its preparation, and can solve the problem that the mechanical properties of C/SiC ceramic matrix composite materials cannot be provided And other issues

Active Publication Date: 2022-03-18
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing PyC interfacial phase process cannot meet the requirements of the PyC interfacial phase to provide the optimal interlayer bonding of C / SiC ceramic matrix composites, and the structure of the PyC interfacial phase cannot provide the optimal mechanical properties of C / SiC ceramic matrix composites

Method used

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  • Pyrolytic carbon interface phase, preparation method and application thereof, carbon fiber reinforced silicon carbide ceramic-based composite material and preparation method thereof
  • Pyrolytic carbon interface phase, preparation method and application thereof, carbon fiber reinforced silicon carbide ceramic-based composite material and preparation method thereof
  • Pyrolytic carbon interface phase, preparation method and application thereof, carbon fiber reinforced silicon carbide ceramic-based composite material and preparation method thereof

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preparation example Construction

[0038] The invention provides a method for preparing a pyrolytic carbon interface phase, comprising the following steps:

[0039] Provide carbon fiber prefabricated body;

[0040] Using gaseous hydrocarbons as a carbon source, performing chemical vapor phase infiltration on the surface of the carbon fiber preform to form a pyrolytic carbon interface phase on the surface of the carbon fiber preform;

[0041] The chemical vapor deposition includes sequentially performing preheating and deposition;

[0042] The vacuum degree of the preheating is 880-980mbar, the temperature is 1000-1200°C, and the holding time is 2-3h;

[0043] The flow rate of the carbon source in the deposition is 250-750mL / min; the pressure is 30-100mbar, the temperature is 900-1000°C, and the holding time is 2-3h.

[0044] In the present invention, unless otherwise specified, each substance in the preparation method is a commercially available product well known to those skilled in the art.

[0045] The in...

Embodiment 1

[0080] The carbon fiber prefabricated body was prepared with T700-12K carbon fiber produced by Toray, Japan, and placed in the chamber of the chemical vapor infiltration equipment after degluing. After vacuuming, it was filled with argon to 880mbar, and the temperature was raised to 1000°C at a rate of 5°C / min. Insulate for 2 hours for preheating, then stop feeding argon, use propylene as the hydrocarbon gaseous precursor, keep the ambient pressure in the chamber at 30mbar, deposit at 950°C for 2 hours, and form a pyrolytic carbon interface phase on the surface of the carbon fiber preform.

Embodiment 2

[0087] The carbon fiber prefabricated body was prepared with T700-12K carbon fiber produced by Toray, Japan, and placed in the chamber of the chemical vapor infiltration equipment after degluing. After vacuuming, it was filled with argon to 880mbar, and the temperature was raised to 1000°C at a rate of 5°C / min. Insulate for 2 hours for preheating, then stop feeding argon, use propylene as the hydrocarbon gaseous precursor, keep the ambient pressure in the chamber at 100mbar, deposit at 950°C for 2 hours, and form a pyrolytic carbon interface phase on the surface of the carbon fiber preform.

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Abstract

The invention belongs to the technical field of carbon fiber reinforced silicon carbide ceramic-based composite materials, and particularly relates to a pyrolytic carbon interface phase, a preparation method and application thereof, a carbon fiber reinforced silicon carbide ceramic-based composite material and a preparation method of the carbon fiber reinforced silicon carbide ceramic-based composite material. The preparation method of the pyrolytic carbon interface phase provided by the invention comprises the following steps: providing a carbon fiber preform; carrying out chemical vapor infiltration on the surface of the carbon fiber preform by taking a gaseous hydrocarbon substance as a carbon source, and forming a pyrolytic carbon interface phase on the surface of the carbon fiber preform; the chemical vapor deposition comprises preheating and deposition in sequence; the vacuum degree of preheating is 880 to 980 mbar, the temperature is 1000 to 1200 DEG C, and the heat preservation time is 2 to 3 hours; the flow of the carbon source in the deposition is 250-750 mL / min; the pressure is 30-100 mbar, the temperature is 900-1000 DEG C, and the heat preservation time is 2-3 hours.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber-reinforced silicon carbide ceramic-based composite materials, and particularly relates to a pyrolytic carbon interface phase and its preparation method and application, carbon fiber-reinforced silicon carbide ceramic-based composite material and its preparation method. Background technique [0002] Carbon fiber reinforced silicon carbide (C / SiC) ceramic matrix composites not only have the characteristics of high temperature resistance, high specific strength, high specific modulus, corrosion resistance, wear resistance and low density, but also have good high temperature mechanical properties. Constructing an interfacial phase with matching performance and synergistic structure is the core element and prerequisite for C / SiC ceramic matrix composites to achieve high mechanical properties. The interfacial phase is an extremely critical microstructural structure in carbon fiber reinforced silico...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/573C04B35/628
CPCC04B35/80C04B35/573C04B35/62873C04B2235/96
Inventor 张中伟段昊志李爱军庞旭李玮洁贾林涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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