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Preparation method of Cf/SiC composite material with HfB2 interface

A composite material, hfb2-sibnc technology, applied in the field of preparation of Cf/SiC composite materials, can solve problems such as prone to oxidation reactions, achieve the effects of shortening the preparation cycle, saving energy, and being easy to implement

Active Publication Date: 2019-10-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a kind of HfB 2 The preparation method of the Cf / SiC composite material at the interface aims to solve the technical problem that the reinforcing phase carbon fiber in the Cf / SiC composite material and its composite material are prone to oxidation reaction in the high-temperature oxidative use environment

Method used

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  • Preparation method of Cf/SiC composite material with HfB2 interface
  • Preparation method of Cf/SiC composite material with HfB2 interface
  • Preparation method of Cf/SiC composite material with HfB2 interface

Examples

Experimental program
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Effect test

Embodiment 1

[0048] a HfB 2 The preparation method of the Cf / SiC composite material of interface, it comprises the following steps:

[0049] Put the carbon fiber in a tube furnace at 450°C for 30 minutes for degumming treatment, soak and etch the degummed carbon fiber in concentrated nitric acid for 60 minutes, then wash the residual liquid on the surface of the carbon fiber with deionized water, and dry it Obtain the carbon fiber after surface activation treatment; Ultrasonic impregnation of the above-mentioned dried carbon fiber preform in HfB 2Precursor solution with a low concentration of the interface phase for 30 minutes, the coated carbon fibers were left at room temperature for 12 hours, then placed in an oven at 60 ° C for 60 minutes, and then placed in a tube furnace, under the protection of nitrogen. Heat at a heating rate of 3°C / min to 300°C for 10 minutes, then heat at a heating rate of 5°C / min to 550°C, hold for 40 minutes, then heat at a heating rate of 8°C / min to 800°C, an...

Embodiment 2

[0054] a HfB 2 The preparation method of the Cf / SiC composite material of interface, it comprises the following steps:

[0055] Put the carbon fiber in a tube furnace at 450°C for 40 minutes for degumming treatment, soak and etch the degummed carbon fiber in concentrated nitric acid for 60 minutes, then wash the residual liquid on the surface of the carbon fiber with deionized water, and dry it Obtain the carbon fiber after surface activation treatment; Ultrasonic impregnation of the above-mentioned dried carbon fiber preform in HfB 2 Precursor solution with a low concentration of the interface phase for 40 minutes, the coated carbon fiber was left at room temperature for 15 hours, then placed in an oven at 60°C for 60 minutes, and then placed in a tube furnace, under the protection of nitrogen. Heat at a heating rate of 3°C / min to 300°C for 10 minutes, then heat at a heating rate of 5°C / min to 550°C, hold for 40 minutes, then heat at a heating rate of 9°C / min to 800°C, and h...

Embodiment 3

[0057] a HfB 2 The preparation method of the Cf / SiC composite material of interface, it comprises the following steps:

[0058] Put the carbon fiber in a tube furnace at 450°C for 30 minutes for degumming treatment, soak and etch the degummed carbon fiber in concentrated nitric acid for 100 minutes, then wash the residual liquid on the surface of the carbon fiber with deionized water, and dry it Obtain the carbon fiber after surface activation treatment; Ultrasonic impregnation of the above-mentioned dried carbon fiber preform in HfB 2 Precursor solution with a low concentration of the interface phase for 10 minutes, the coated carbon fiber was left at room temperature for 12 hours, then placed in an oven at 60 ° C for 60 minutes, and then placed in a tube furnace, under the protection of nitrogen. Heat at a heating rate of 3°C / min to 300°C and hold for 15 minutes, then heat at a heating rate of 5°C / min to 550°C, hold for 40 minutes, then heat at a heating rate of 10°C / min to...

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Abstract

The invention discloses a preparation method of a Cf / SiC composite material with an HfB2 interface. The preparation method comprises the steps that activating treatment is conducted on a carbon fibersurface, interfacial phase is prepared, a porous fiber preform is prepared, and a silicon carbide matrix is prepared. The preparation method of the Cf / SiC composite material with the HfB2 interface ischaracterized in that the fiber preform is filled with the silicon carbide matrix to form a carbon fiber reinforced silicon carbide ceramic matrix composite, and an interface layer coats the surfaceof carbon fiber in the composite material. According to the preparation method of the Cf / SiC composite material with the HfB2 interface, high-temperature resistant and oxidation resistant HfB2 interface phase is prepared on the surface of the carbon fiber, the original mechanical property of the carbon fiber is kept, and the oxidation resistant performance of the carbon fiber at high temperature is improved. According to the preparation method of the Cf / SiC composite material with the HfB2 interface, the technical problems that the preparation period of a traditional preparation method of silicon carbide ceramic matrix composite materials is long, the compatibility of toughened carbon fiber and the silicon carbide matrix interface in the Cf / SiC composite material occurs, and oxidizing reaction of the carbon fiber is prone to occurring in the using environment with high temperature oxidation stability are solved.

Description

technical field [0001] The invention relates to the technical field of carbon fiber reinforced silicon carbide ceramic matrix composite materials, in particular to a 2 Preparation of interfacial Cf / SiC composites. Background technique [0002] Carbon fiber reinforced silicon carbide ceramic matrix composite (Cf / SiC) has light weight, high temperature resistance, high specific strength, high specific modulus, low thermal expansion coefficient, high matrix density, thermal shock resistance, ablation resistance, thermochemical stability Good and resistant to harsh environments and strong adaptability, it is a new lightweight composite material that integrates structural bearing and oxidation / ablation resistance. It has been widely used in aerospace, satellite, military and nuclear industries. Carbon fiber has excellent properties such as high modulus, high strength, low density, low thermal expansion, high temperature resistance, oxidation resistance, no creep, high thermal co...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/565C04B35/622C04B35/626
CPCC04B35/806C04B35/565C04B35/622C04B35/62605C04B2235/3804C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96
Inventor 王钺杨建铃周俊霖陈燕云何海静陆薪宇
Owner SOUTHWEST PETROLEUM UNIV
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