Method for uniformly introducing ultrahigh-temperature ceramic component to braided three-dimensional carbon fibers with high content

A carbon fiber braided, ultra-high temperature ceramic technology, applied in the field of ultra-high temperature structural materials, can solve the problems of long process cycle, uneven distribution of ultra-high temperature ceramics, low component content, etc. The effect of efficiency

Active Publication Date: 2018-06-29
HARBIN INST OF TECH
3 Cites 6 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of uneven distribution of ultra-high-temperature ceramics, low component content and long process cycle in the current method of introducing ultra-high-temperature ceramics...
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Abstract

A method for uniformly introducing an ultrahigh-temperature ceramic component to braided three-dimensional carbon fibers with high content. The invention belongs to the field of ultrahigh temperaturestructural materials and solves the problems of non-uniform distribution and low content of the ultrahigh-temperature ceramic component in the similar methods in the prior art. The method includes following steps: 1) mixing ultrahigh-temperature ceramic powder with anhydrous ethanol and polyacrylic acid to obtain ultrahigh-temperature ceramic slurry; 2) injecting the ceramic slurry into interior of the braided carbon fiber via an injection apparatus and performing ultrasonic vibration, and continuously injecting the slurry to complete vibration-assisted slurry injection process; 3) adding theultrahigh-temperature ceramic slurry and a green body to a reactor, performing vacuum impregnation and then ultrasonic vibration to complete vibration-assisted ultrasonic vibration. Through compositeprocess of the vibration-assisted slurry injection process and the vibration-assisted ultrasonic vibration, the ceramic slurry can be completely and uniformly dispersed in carbon fiber frameworks under effect of the ultrasonic high-frequency vibration. The product is high in ceramic content and is short in process period.

Technology Topic

UltrasoundHigh frequency vibration +9

Image

  • Method for uniformly introducing ultrahigh-temperature ceramic component to braided three-dimensional carbon fibers with high content
  • Method for uniformly introducing ultrahigh-temperature ceramic component to braided three-dimensional carbon fibers with high content
  • Method for uniformly introducing ultrahigh-temperature ceramic component to braided three-dimensional carbon fibers with high content

Examples

  • Experimental program(13)

Example Embodiment

[0018] Specific implementation mode 1: The method for uniformly introducing a high content of ultra-high temperature ceramic components into a three-dimensional carbon fiber braid in this embodiment is implemented in the following steps:
[0019] 1. Mix the ultra-high temperature ceramic powder with absolute ethanol and polyacrylic acid (PAA) into a ball milling tank. The solid content of the ultra-high temperature ceramic powder is 35~45vol%, and polyacrylic acid (PAA) accounts for the ultra-high temperature ceramic powder. 1% to 2% of the body mass, then place the ball milling jar in a planetary ball mill for ball milling to obtain ultra-high temperature ceramic slurry;
[0020] 2. Inject the ultra-high-temperature ceramic slurry into the carbon fiber braid through the grouting device. When resistance occurs in the injection, the carbon fiber braid is transferred to the reactor containing the ultra-high-temperature ceramic slurry, and then ultrasonic vibration is applied, and then the injection is continued. Complete the vibration-assisted grouting process once, and repeat the vibration-assisted grouting process many times to obtain the green body after vibration-assisted grouting;
[0021] 3. Put the ultra-high temperature ceramic slurry and the green body after vibration-assisted grouting into the reactor. The ultra-high temperature ceramic slurry is immersed in the green body after the vibration-assisted grouting, and the reactor is placed in a vacuum impregnation bucket. Under the impregnation treatment, the reactor is ultrasonically vibrated to complete a vibration-assisted vacuum impregnation process, repeated vibration-assisted vacuum impregnation process many times, and complete the introduction of high content of ultra-high temperature ceramic components into the three-dimensional carbon fiber braid uniformly.

Example Embodiment

[0022] Specific embodiment two: this embodiment is different from specific embodiment one in that the ultra-high temperature ceramic powder described in step one is zirconium carbide powder, hafnium carbide powder, silicon carbide powder, tantalum carbide powder, boride One or more mixtures of zirconium powder, hafnium boride powder, and hafnium nitride powder.

Example Embodiment

[0023] Specific embodiment three: This embodiment is different from specific embodiment one or two in that in step one, the rotation speed of the ball mill is controlled to be 250-300 r/min, and the ball milling time is 8-10 h.
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PUM

PropertyMeasurementUnit
The average particle size200.0nm
The average particle size500.0nm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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