Method for spraying aluminum oxide-silicon carbide whisker anti-oxidation coating on surface of carbon fiber

A silicon carbide whisker, anti-oxidative coating technology, applied in the processing of textile materials, spray/jet textile material processing, textiles and papermaking, etc., can solve the problems of low fracture toughness, limited application, high porosity, etc. Improve the strength and fracture toughness, improve the comprehensive mechanical properties, the effect of accurate composition

Active Publication Date: 2017-12-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure Al 2 o 3 It has defects such as high porosity and low fracture toughness, which limit its application as an anti-oxidation protective coating to a certain extent
In addition, the traditional sol dipping coating method easily leads to problems such as uneven sol coating, CF mutual adhesion, and potential crack sources in the coating, which limits the protective effect of the coating.

Method used

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  • Method for spraying aluminum oxide-silicon carbide whisker anti-oxidation coating on surface of carbon fiber
  • Method for spraying aluminum oxide-silicon carbide whisker anti-oxidation coating on surface of carbon fiber
  • Method for spraying aluminum oxide-silicon carbide whisker anti-oxidation coating on surface of carbon fiber

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Experimental program
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Effect test

Embodiment 1

[0032] The method for spraying the aluminum oxide-silicon carbide whisker anti-oxidation coating on the carbon fiber surface of the present embodiment comprises the following steps:

[0033] Step 1, pretreatment of CF. First, the CF is ultrasonically cleaned with deionized water, acetone, ethanol, and deionized water, and dried in the air. With the graphite electrode as the cathode, the cleaned CF and the flake graphite electrode are placed At 40°C, in 0.5mol / L phosphoric acid electrolyte, carry out ultrasonic anodic oxidation treatment on CF, the ultrasonic assisted ultrasonic frequency used is 40KH z , the ultrasonic power is 100W, the oxidation time is 20min, and the current density is 50mA / cm 2 ; Finally, the CF was taken out, washed with deionized water and dried to obtain the CF after surface pretreatment.

[0034] Step 2, Al 2 o 3 -SiC w The preparation of sol, utilizes the sol-gel method to configure the aluminum oxide sol of 0.4mol / L; Preliminarily weighs 4.896g a...

Embodiment 2

[0039] The method for spraying the aluminum oxide-silicon carbide whisker anti-oxidation coating on the carbon fiber surface of the present embodiment comprises the following steps:

[0040] Step 1, pretreatment of CF. First, the CF is ultrasonically cleaned with deionized water, acetone, ethanol, and deionized water, and dried in the air. With the graphite electrode as the cathode, the cleaned CF and the flake graphite electrode are placed At 40°C and 1.0mol / L phosphoric acid electrolyte, carry out ultrasonic anodic oxidation treatment on CF, the ultrasonic assisted ultrasonic frequency used is 25KH z , the ultrasonic power is 80W, the oxidation time is 30min, and the current density is 25mA / cm 2 ; Finally, the CF was taken out, washed with deionized water and dried to obtain the CF after surface pretreatment.

[0041] Step 2, Al 2 o 3 -SiC w The preparation of sol, utilizes sol-gel method to configure the aluminum oxide sol of 0.8mol / L; Preliminarily weighs 9.792g alumin...

Embodiment 3

[0046] The method for spraying the aluminum oxide-silicon carbide whisker anti-oxidation coating on the carbon fiber surface of the present embodiment comprises the following steps:

[0047] Step 1, pretreatment of CF. First, the CF is ultrasonically cleaned with deionized water, acetone, ethanol, and deionized water, and dried in the air. With the graphite electrode as the cathode, the cleaned CF and the flake graphite electrode are placed At 40°C, in 0.5mol / L phosphoric acid electrolyte, carry out ultrasonic anodic oxidation treatment on CF, the ultrasonic assisted ultrasonic frequency used is 40KH z , the ultrasonic power is 100W, the oxidation time is 20min, and the current density is 50mA / cm 2 ; Finally, the CF was taken out, washed with deionized water and dried to obtain the CF after surface pretreatment.

[0048] Step 2, Al 2 o 3 -SiC w The preparation of sol, utilizes sol-gel method to configure the aluminum oxide sol of 0.6mol / L; Preliminarily weighs 7.344g alumi...

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Abstract

The invention discloses a method for spraying an aluminum oxide-silicon carbide whisker anti-oxidation coating on the surface of a carbon fiber (CF). The method comprises the three steps of CF pretreatment and preparation of Al2O3-SiCw sol, spraying of the Al2O3-SiCw sol on the surface of the CF and heat treatment of the Al2O3-SiCw coating on the surface of the CF. The Al2O3-SiCw (aluminum oxide-silicon carbide whisker) anti-oxidation coating is prepared on the surface of the CF through a sol spraying method, the anti-oxidation performance of the CF under the aerobic atmosphere is improved, and the certain research foundation is laid for preparing a CF/HA composite with the good mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of protective coating materials, and in particular relates to a method for spraying an alumina-silicon carbide whisker anti-oxidation coating on the surface of carbon fibers. Background technique [0002] Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 , HA) is the main inorganic component of human and animal bones and teeth. With good conductivity, bioactivity and biocompatibility, it is widely used as a physiological scaffold for hard tissue repair materials and bone filling materials. However, the inherent brittleness and crack sensitivity of pure HA limit its wide application in load-bearing parts. In order to improve the comprehensive mechanical properties of pure HA ceramic materials, carbon fibers (CF), ceramic particles, intermetallic compounds, long metal fibers, partially stabilized cobalt dioxide particles, whiskers and nanoparticles are usually added to the matrix of HA as reinforcements. middle. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/04D06B1/02D06B15/00
Inventor 赵雪妮何富珍樊小蒲王旭东张黎杨建军王瑶刘庆瑶
Owner SHAANXI UNIV OF SCI & TECH
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