Micro-arc oxidation layer with spherical molybdenum disulfide and preparation method of micro-arc oxidation layer

A technology of micro-arc oxidation layer and molybdenum disulfide, which is applied in the direction of coating, liquid chemical plating, surface reaction electrolytic coating, etc., can solve the problem of uneven coating of solid lubricants, short action time of solid lubricants, and film layer In order to solve the problems such as the decrease of the binding force of the film base, the micro-arc oxidation layer of spherical molybdenum disulfide is uniform, strong in generalization, and good in sphericity.

Pending Publication Date: 2020-12-22
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, directly adding the above solid lubricants to the electrolyte will easily lead to the agglomeration of the solid lubricants in the electrolyte, which will eventually lead to a decrease in the film-base binding force of the film layer and affect the overall performance of the film layer.
The introduction of solid lubricants by coating can easily lead to uneven coating of solid lubricants on the surface of the film layer and the effect of solid lubricants is relatively short

Method used

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  • Micro-arc oxidation layer with spherical molybdenum disulfide and preparation method of micro-arc oxidation layer
  • Micro-arc oxidation layer with spherical molybdenum disulfide and preparation method of micro-arc oxidation layer
  • Micro-arc oxidation layer with spherical molybdenum disulfide and preparation method of micro-arc oxidation layer

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Experimental program
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Effect test

Embodiment 1

[0035]Step 1. Polish the titanium alloy with 200#, 400#, 600#, 800#, 1000# sandpaper in sequence until the surface has no scratches, and then polish until the surface is smooth, as the matrix;

[0036]Adding sodium hexametaphosphate, potassium fluoride and sodium citrate to deionized water to obtain an electrolyte solution, each liter of electrolyte solution contains 6g sodium hexametaphosphate, 3g potassium fluoride, and 3g sodium citrate;

[0037]Inject the electrolyte into the electrolytic cell of micro-arc oxidation, place the titanium alloy substrate in the electrolyte as the anode, and place the stainless steel plate in it as the cathode, perform micro-arc oxidation, and prepare a micro-arc oxidation film on the surface of the titanium alloy. Wash and dry afterwards.

[0038]Step 2. Place the titanium alloy treated in step 1 in a reaction kettle containing a hydrothermal reaction solution, and then hydrothermally react the reaction kettle at 180°C for 2 hours. After the reaction, remov...

Embodiment 2

[0046]The preparation method of this embodiment is the same as that of embodiment 1, except that: in step 2, the PEG in the hydrothermal reaction solution is changed to PVP, the temperature of the hydrothermal reaction is 100° C., and the time is 36 hours.

Embodiment 3

[0048]The preparation method of this embodiment is the same as that of embodiment 1, except that the PEG in the hydrothermal reaction solution in step 2 is replaced with PVA.

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Abstract

The invention discloses a micro-arc oxidation layer with spherical molybdenum disulfide and a preparation method of the micro-arc oxidation layer, and belongs to the field of surface treatment. According to the preparation method, the micro-arc oxidation film layer, namely a ceramic film layer, is prepared on a titanium alloy through a micro-arc oxidation technology, high hardness is achieved, andthe bearing capacity of the titanium alloy is improved; and then, a hydrothermal synthesis method is adopted for generating the spherical molybdenum disulfide on the micro-arc oxidation film layer insitu, and a lubricating film layer is generated outside a hard film layer, so that the wear resistance and the antifriction property of the titanium alloy in use are remarkably improved, and the application field of the titanium alloy is expanded. On the other hand, by controlling the hydrothermal reaction temperature and time, the yield and utilization rate of molybdenum disulfide can be increased, a spherical molybdenum disulfide layer with a hole sealing effect and good sphericity degree is obtained, micropores of the micro-arc oxidation film layer are filled with the spherical molybdenumdisulfide, and the friction coefficient is greatly decreased; and the micro-arc oxidation layer with the spherical molybdenum disulfide and the preparation method of the micro-arc oxidation layer havevery high generalization performance.

Description

Technical field[0001]The invention belongs to the field of surface treatment, in particular to a micro-arc oxidation layer with spherical molybdenum disulfide and a preparation method thereof.Background technique[0002]As a commonly used light metal, titanium alloy has a wide range of applications in petrochemical, medical, aviation and other fields due to its light weight, high specific strength, strong corrosion resistance, and good thermal stability. However, due to the low density of titanium alloy, its low plastic shear resistance and its weak work hardening ability, its wear resistance is poor. At the same time, the electrons in the outer layer of titanium atoms are extremely easy to lose, and the thermal conductivity of titanium alloys is low. It is extremely easy to form a relatively viscous oxide film layer on the surface of titanium alloys, which causes adhesion and friction on the surface, which makes the titanium alloy in actual service The safety in the process has great...

Claims

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Application Information

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IPC IPC(8): C23C18/12C25D11/26
CPCC23C18/1204C25D11/26
Inventor 陈永楠杨泽慧张震王楠张龙徐义库赵秦阳姜超平陈宏郝建民
Owner CHANGAN UNIV
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