Method for in-situ generation of aluminum nitride layer on aluminum matrix based on ion nitriding technology

A technology of ion nitriding and aluminum nitride layer, which is applied in coating, solid-state diffusion coating, metal material coating process, etc., can solve the problems of hindering the diffusion of nitrogen atoms and the process effect is not significant, so as to reduce the re-oxidation Probability, good binding force, and wide range of applications

Pending Publication Date: 2021-09-21
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

T.Arai and others first proposed the possibility of plasma nitriding of most industrial aluminum alloys, and then some scholars in Germany, Japan and France also did corresponding research in this area, but the process effects involved in these researches were not significant
This is because the chemical properties of aluminum are very active, and there are natural oxide films with good stability on the surface of pure aluminum and aluminum alloys, which seriously hinder the diffusion of nitrogen atoms into the aluminum matrix.

Method used

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  • Method for in-situ generation of aluminum nitride layer on aluminum matrix based on ion nitriding technology
  • Method for in-situ generation of aluminum nitride layer on aluminum matrix based on ion nitriding technology
  • Method for in-situ generation of aluminum nitride layer on aluminum matrix based on ion nitriding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Cut the metal element aluminum with a purity of 99.999% into four aluminum substrates with a size of 10mm×10mm×10mm with a molybdenum wire cutting machine;

[0032] Use P600, P1000, P1500, P2000 silicon carbide sandpaper to grind the surface of the cut aluminum substrate in turn to make the surface smooth;

[0033] Use W2.5 and W1 diamond polishing agents to polish the surface of the ground aluminum substrate in order to obtain a smooth aluminum substrate;

[0034] Ultrasonic cleaning of the polished aluminum substrate with absolute ethanol for 15 minutes, and drying to remove dust, oil and other impurities attached to the surface of the aluminum substrate, to obtain a flat, smooth and clean aluminum substrate;

[0035] (2) Put four flat, smooth and clean aluminum substrates on the cathode disk of the ion nitriding furnace, and put four sponge titanium on the cathode disk at the same time, the distance between any aluminum substrate and the nearest sponge titanium ...

Embodiment 2

[0042] (1) Cut the aluminum alloy AlMgSi0.5 into four aluminum substrates with a size of 10mm×10mm×10mm with a molybdenum wire cutting machine;

[0043] Use P600, P1000, P1500, P2000 silicon carbide sandpaper to grind the surface of the cut aluminum substrate in turn to make the surface smooth;

[0044] Use W2.5 and W1 diamond polishing agents to polish the surface of the ground aluminum substrate in order to obtain a smooth aluminum substrate;

[0045] Ultrasonic cleaning of the polished aluminum substrate with absolute ethanol for 15 minutes, and drying to remove dust, oil and other impurities attached to the surface of the aluminum substrate, to obtain a flat, smooth and clean aluminum substrate;

[0046] (2) Put four flat, smooth and clean aluminum substrates on the cathode disk of the ion nitriding furnace, and put four sponge titanium on the cathode disk at the same time, the distance between any aluminum substrate and the nearest sponge titanium The distance between th...

Embodiment 3

[0053] (1) Cut a piece of aluminum matrix with a size of 10mm * 10mm * 10mm from the metal elemental aluminum with a purity of 99.999% with a molybdenum wire cutting machine;

[0054] Use P600, P1000, P1500, P2000 silicon carbide sandpaper to grind the surface of the cut aluminum substrate in turn to make the surface smooth;

[0055] Use W2.5 and W1 diamond polishing agents to polish the surface of the ground aluminum substrate in order to obtain a smooth aluminum substrate;

[0056] Ultrasonic cleaning of the polished aluminum substrate with absolute ethanol for 15 minutes, and drying to remove dust, oil and other impurities attached to the surface of the aluminum substrate, to obtain a flat, smooth and clean aluminum substrate;

[0057] (2) Put the flat, smooth and clean aluminum matrix on the cathode disc of the ion nitriding furnace, and put a sponge titanium on the cathode disc at the same time, and the distance between the aluminum matrix and the sponge titanium is 1cm, ...

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Abstract

The invention relates to a method for in-situ generation of an aluminum nitride layer on an aluminum matrix based on an ionic nitriding technology, and belongs to the technical field of metal surface modification. The method comprises the following steps: sequentially carrying out grinding, polishing and cleaning pretreatment on the surface of the aluminum matrix, after that, carrying out ion bombardment on the pretreated surface of the aluminum matrix in argon and hydrogen atmospheres in the presence of titanium, then in a nitrogen atmosphere, carrying out ion nitriding on the surface of the aluminum matrix after being subjected to ion bombardment, and forming the aluminum nitride layer on the surface of the aluminum matrix. The invention innovatively provides the method for combining early-stage ion bombardment and later-stage ion nitriding in an ion nitriding furnace, an oxidation film on the surface of the aluminum matrix is effectively removed, the aluminum nitride layer with large thickness is prepared on the surface of the aluminum matrix, the hardness, corrosion resistance, wear resistance and other properties of the surface of the aluminum matrix are improved easily, and therefore, the application range of the aluminum matrix is wider.

Description

technical field [0001] The invention relates to a method for in-situ forming an aluminum nitride layer on an aluminum substrate based on ion nitriding technology, and belongs to the technical field of metal surface modification. Background technique [0002] In recent years, as a lightweight engineering material, aluminum and aluminum alloys have received continuous attention in the aviation and automotive industries due to their high specific strength, good electrical and thermal conductivity, good corrosion resistance, and good plasticity and formability. However, its application is greatly limited due to its soft texture and poor wear resistance, so people usually use surface modification to improve the hardness and wear resistance of aluminum and its alloys. Since aluminum nitride (AlN) has high thermal conductivity (320W / mK), good corrosion resistance, high electrical resistivity, high hardness (HV-1400) and wear resistance, an aluminum nitride layer is formed on the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/36C23C8/02
CPCC23C8/36C23C8/02
Inventor 杨凯军朱锦鹏汲思宇庆宇斌朱雅萌李庆奎何季麟
Owner ZHENGZHOU UNIV
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