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Method for preparing thermal protection ceramic layer on surface of metal or metal composite material

A metal composite material and ceramic layer technology, applied in the preparation of thermal protection layer, in the field of preparation of thermal protection ceramic layer on the surface of metal or metal composite material, can solve the problems of cumbersome barrier film prefabrication process, etc., to improve the thermal protection effect and easy to control , cost reduction effect

Inactive Publication Date: 2015-04-29
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the prefabrication process of the barrier film is cumbersome

Method used

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  • Method for preparing thermal protection ceramic layer on surface of metal or metal composite material
  • Method for preparing thermal protection ceramic layer on surface of metal or metal composite material
  • Method for preparing thermal protection ceramic layer on surface of metal or metal composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The aluminum alloy sample was first polished with sandpaper, then cleaned with acetone, and then rinsed with deionized water for later use. Then complete the preparation in the following steps:

[0046] Step 1: Prefabricating an insulating barrier layer on the surface of the aluminum alloy sample

[0047] First, the electrolyte solution was prepared according to sodium silicate 1g / L and sodium hydroxide 1g / L, and the solvent was deionized water.

[0048] Then, the above electrolytic solution is introduced into the stainless steel tank as the cathode, and the aluminum alloy sample is used as the anode, and the aluminum alloy sample is subjected to plasma electrolytic oxidation treatment to prefabricate the insulating barrier layer by means of pulse power output.

[0049] The conditions for plasma electrolytic oxidation treatment are: current 3A / dm 2 , frequency 100Hz, duty cycle 30%, oxidation time 3min.

[0050] The second step: the configuration concentration is 5g / ...

Embodiment 2

[0062] The magnesium alloy sample was first polished with sandpaper, then cleaned with alcohol, and then rinsed with deionized water for later use. Then complete the preparation in the following steps:

[0063] Step 1: Prefabricating an insulating barrier layer on the surface of the magnesium alloy sample

[0064] First, the electrolyte solution was prepared according to potassium silicate 30g / L and potassium hydroxide 5g / L, and the solvent was deionized water.

[0065] Then, the above electrolytic solution is introduced into the stainless steel tank as the cathode, the magnesium alloy sample is used as the anode, and the magnesium alloy sample is subjected to plasma electrolytic oxidation treatment to prefabricate the insulating barrier layer by means of pulse power output.

[0066] The conditions for plasma electrolytic oxidation treatment are: current 10A / dm 2 , frequency 900Hz, duty cycle 50%, oxidation time 10min.

[0067] The second step: configure the aqueous solutio...

Embodiment 3

[0083] The aluminum-matrix composite material samples were first polished with sandpaper, then cleaned with alcohol, and then rinsed with deionized water for later use. Then complete the preparation in the following steps:

[0084] Step 1: Prefabricate an insulating barrier layer on the surface of the aluminum matrix composite material sample

[0085] First, the electrolyte solution was prepared according to potassium silicate 15g / L and potassium hydroxide 3g / L, and the solvent was deionized water.

[0086] Then, the above electrolytic solution is introduced into the stainless steel tank as the cathode, and the aluminum-based composite material sample is used as the anode, and the aluminum-based composite material sample is subjected to plasma electrolytic oxidation treatment to prefabricate the insulating barrier layer by means of pulse power output.

[0087] The conditions for plasma electrolytic oxidation treatment are: current 5A / dm 2 , frequency 500Hz, duty cycle 30%, oxi...

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Abstract

The invention discloses a method for preparing a thermal protection ceramic layer on the surface of metal or a metal composite material. The method disclosed by the invention comprises the following steps of: firstly, preparing a nitrate aqueous solution (1), an aqueous solution (2) of nitrate compound metal oxide sol, an aqueous solution (3) of nitrate compound metal oxide nano-particles and an aqueous solution (4) of nitrate compound metal oxide sol and nano-particles (4); and then, putting a sample, on which an insulating barrier layer is pre-prepared, in the solution (1), (2), (3) or (4), or, putting a sample, the surface of which is not processed, in the solution (2), (3) or (4), and applying high-energy pulse voltage on the sample to carry out cathode plasma electrolytic deposition. The method disclosed by the invention has the benefits that by adding the oxide sol and the nano-particles, cathode plasma discharge can be promoted; the fussy process of pre-preparing an insulating barrier film can be avoided; furthermore, the deposition rate of the ceramic layer can be obviously increased; the organization structure of the ceramic layer is improved; and thus, a nano-crystal ceramic layer is formed.

Description

technical field [0001] The invention relates to a method for preparing a heat protection layer, in particular to a method for preparing a heat protection ceramic layer on the surface of a metal or a metal composite material, and belongs to the technical field of material engineering. Background technique [0002] With the rapid development of high-tech industries such as aerospace and advanced motor vehicles and the increase in the demand for lightweight, engine hot-end components (such as turbine blades, exhaust pipes and engine pistons) are exposed to higher and higher temperatures, and as the world With the intensification of the energy crisis and the increasing awareness of energy saving and emission reduction, the development and production of high-performance and environment-friendly lightweight vehicles have become more and more important. At the same time, the surface properties of key engine components (heat insulation Heat resistance, thermal shock resistance, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/08
Inventor 王萍李建平郭永春杨忠夏峰王建利高培虎马志军白亚平
Owner XIAN TECH UNIV
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