Method for preparing high-temperature-resistant oxidation coating on surface of carbon/carbon composite material

A carbon composite material, high-temperature oxidation-resistant technology, applied in metal material coating process, coating, ion implantation plating, etc., can solve the problems of reduced oxidation resistance and low bonding strength, so as to improve bonding strength and toughness Effect

Inactive Publication Date: 2016-08-17
TAIYUAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to provide a method for preparing a high-temperature oxidation-resistant coating on the surface of a carbon / carbon composite material. Using plasma surface activation technology can roughen the surface of the carbon / carbon composite material, which helps to improve the bonding strength between the coating and the substrate , Shuanghui plasma surface metallurgy technology prepares a high-temperature oxidation-resistant composite coating that is metallurgically bonded to the substrate; the coating is metallurgically bonded to the substrate, which can further solve the problem of low bonding strength, and the surface of the coating is chromium oxide and oxide Silicon, which does not react with oxygen, can solve the problem of decreased oxidation resistance caused by the formation of holes due to gas discharge during the oxidation process

Method used

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  • Method for preparing high-temperature-resistant oxidation coating on surface of carbon/carbon composite material
  • Method for preparing high-temperature-resistant oxidation coating on surface of carbon/carbon composite material
  • Method for preparing high-temperature-resistant oxidation coating on surface of carbon/carbon composite material

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Embodiment 1

[0025] A kind of preparation method of high temperature oxidation resistant coating of carbon / carbon composite material

[0026] In this embodiment, plasma surface activation technology and double-glow plasma surface metallurgy technology are used to etch the surface of carbon / carbon composite workpiece with hydrogen plasma; Chromium is infiltrated into the surface of the infiltrated layer to form a nickel-chromium alloy coating on the surface of the workpiece. Finally, hydrogen gas is introduced to carry decamethylcyclopentasiloxane and oxygen as reaction gases to prepare a composite coating of chromium oxide and silicon oxide on the surface of the workpiece. . The schematic diagram of the prepared high-temperature oxidation-resistant coating is attached figure 1 shown. Specifically include the following steps:

[0027](1) The surface activation treatment process of the workpiece is as follows: put the carbon / carbon composite material workpiece into the microwave plasma e...

Embodiment 2

[0033] A kind of preparation method of high temperature oxidation resistant coating of carbon / carbon composite material

[0034] The coating preparation method for improving the high-temperature oxidation resistance of carbon / carbon composite materials provided in this embodiment specifically includes the following steps:

[0035] (1) The surface activation treatment process of the workpiece is as follows: put the carbon / carbon composite material workpiece into the microwave plasma enhanced experimental device, evacuate the vacuum to below 1Pa, inject hydrogen with a flow rate of 200sccm, working pressure of 6.2kPa, microwave power of 2kW, The etching time is 60min, and the surface activation treatment is carried out;

[0036] (2) The preparation process of the nickel infiltrated layer is as follows: put the etched carbon / carbon composite material workpiece into the double-glow plasma surface metallurgy device, use the nickel metal target with a thickness of 5mm and a purity o...

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Abstract

The invention discloses a method for preparing a high-temperature-resistant oxidation coating on the surface of a carbon / carbon composite material. The method is implemented through the technical scheme that by means of the plasma surface activating technology and the double glow plasma surface metallurgical technology, the surface of an activated carbon / carbon composite material workpiece is etched through hydrogen plasmas; then, a nickel target serves as a source electrode, and a nickel-based infiltrated layer is prepared on the surface of the workpiece; a chromium target serves as a source electrode to prepare a nickel-chromium composite depositing coating; finally, siloxane is used as a precursor, oxygen serves as reaction gas, and a chromium oxide and silicon oxide compound coating is prepared on the surface of the workpiece. The bonding strength of the coating prepared through the method and a base body is high, components of the coating are distributed in a gradient mode, and high-temperature-resistant oxidation performance of the carbon / carbon composite material can be improved. The coating is prepared in one device, the technology is simple, and cost is low.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature oxidation-resistant coating on the surface of a carbon / carbon composite material, belonging to the field of material surface modification. Background technique [0002] Carbon / carbon composite materials have excellent properties such as high strength, high modulus, thermal shock resistance, ablation resistance, high thermal conductivity, low thermal expansion coefficient, good vibration absorption, good friction and small specific gravity, and can still be used at high temperatures. The mechanical properties at room temperature, especially the fact that the strength does not decrease but increases with the increase of temperature, makes it an incomparable advantage for other materials to be used as thermal structural parts in aviation, aerospace and other fields. However, the insufficient high-temperature oxidation resistance of carbon / carbon composite materials limits its application i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/18C23C14/22C23C14/58
CPCC23C14/022C23C14/18C23C14/22C23C14/5846
Inventor 刘小萍刘小镇于盛旺黑鸿君郭麒孟天旭高洁王荣
Owner TAIYUAN UNIV OF TECH
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