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Preparation method of three-dimensional carbon fiber toughened ultrahigh-temperature ceramic-based composite material with high breaking work

A technology of ultra-high temperature ceramics and composite materials, which is applied in the new preparation field of three-dimensional carbon fiber toughened ultra-high temperature ceramic matrix composites, which can solve the problems of low component content and low fracture work, and achieve low equipment cost, reduce pores, optimize The effect of distribution uniformity

Active Publication Date: 2018-09-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of low content of ceramic components and low fracture work of the three-dimensional carbon fiber toughened ultra-high temperature ceramic matrix composite material obtained by the current preparation method, and provides a three-dimensional carbon fiber toughened ultra-high temperature with high fracture work. Preparation method of ceramic matrix composite material

Method used

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  • Preparation method of three-dimensional carbon fiber toughened ultrahigh-temperature ceramic-based composite material with high breaking work
  • Preparation method of three-dimensional carbon fiber toughened ultrahigh-temperature ceramic-based composite material with high breaking work
  • Preparation method of three-dimensional carbon fiber toughened ultrahigh-temperature ceramic-based composite material with high breaking work

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specific Embodiment approach 1

[0020] Embodiment 1: The preparation method of the three-dimensional carbon fiber toughened ultra-high temperature ceramic matrix composite material with high fracture work in this embodiment is implemented according to the following steps:

[0021] 1. The three-dimensional carbon fiber braid is placed in a graphite mold, and then placed in a deposition furnace. The mixed gas of propylene and carbon tetrachloride is used as the gas source. 320Pa, carry out vapor deposition, and cool to room temperature to obtain a three-dimensional carbon fiber braided with a pyrolysis carbon coating;

[0022] 2. Mix the ultra-high temperature ceramic powder with absolute ethanol and polyacrylic acid (PAA) into the ball mill, wherein the solid phase content of the ultra-high temperature ceramic powder is 35-45 vol%, and polyacrylic acid (PAA) accounts for the ultra-high temperature ceramic powder. 1% to 2% of the body mass, and then place the ball mill in a planetary ball mill for ball milling...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of propylene to carbon tetrachloride in step 1 is 0.6-0.7:1.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the deposition thickness of the pyrolysis carbon coating in step 1 is 400-600 nm.

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Abstract

The invention relates to a preparation method of three-dimensional carbon fiber toughened ultrahigh-temperature ceramic-based composite material with high breaking work, and belongs to the field of inorganic non-metal materials, and solves the problems of low content of ceramic components and low fracture work of three-dimensional carbon fiber toughened ultra-high temperature ceramic-based composite material obtained by the present preparation methods. The preparation method comprises the following steps of: 1, depositing a cracking carbon coating on the surface of a three-dimensional carbon fiber woven body; 2, mixing the ultra-high temperature ceramic powder with absolute ethyl alcohol and polyacrylic acid to obtain the ultra-high temperature ceramic slurry; 3, injecting the ceramic slurry into the three-dimensional carbon fiber braided body through a grouting device, and applying ultrasonic vibration when the resistance is to be injected and repeating the auxiliary grouting processfor a plurality of times; 4, performing a vibration-assisted vacuum impregnation process for a plurality of times; 5, performing discharge plasma sintering after molding. The intrinsic brittleness ofthe three-dimensional carbon fiber toughened ultrahigh-temperature ceramic-based composite material is obviously optimized, and the fracture power is up to 1,200J / m2.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a novel preparation method of a three-dimensional carbon fiber toughened ultra-high temperature ceramic matrix composite material with high fracture work. Background technique [0002] Since the concept of hypersonic speed was proposed, people have never stopped desiring and exploring hypersonic flight. This also makes the hot end components typically represented by the nose cone and the leading edge of the wing face extremely severe thermal barrier tests, which will withstand high temperature thermal shocks over 1800°C and strong oxidizing atmosphere challenges. Therefore, ultra-high temperature thermal protection has become a major engineering problem and a core scientific problem faced by hypersonic flight, and the demand for thermal protection materials that can be used reliably for a long time in ultra-high temperature environments is also increasi...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/628C04B35/622C04B35/56
CPCC04B35/806C04B35/5622C04B35/622C04B35/62873C04B2235/3826C04B2235/5248C04B2235/5252C04B2235/616C04B2235/658C04B2235/666C04B2235/96
Inventor 程源胡平马晨张东洋方成张幸红
Owner HARBIN INST OF TECH
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