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A long-acting antibacterial solid lubricating film layer for space environment and preparation method thereof

A solid lubrication, space environment technology, applied in coating, vacuum evaporation plating, metal material coating process, etc., can solve the problems of decreased antibacterial effect, less Ag reserves, depleted Ag elements, etc., and achieve good application prospects , The effect of not reducing the antibacterial level

Active Publication Date: 2020-08-25
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, due to the thinner sputtered coating, the Ag reserves in the coating are less, after a period of use, the Ag element in the coating is exhausted, and the antibacterial effect is seriously reduced, which cannot meet the requirements Long-term and stable antibacterial lubrication requirements in space environment

Method used

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  • A long-acting antibacterial solid lubricating film layer for space environment and preparation method thereof
  • A long-acting antibacterial solid lubricating film layer for space environment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the present embodiment, the preparation process of substrate surface coating is as follows:

[0026] (1) The TC4 titanium alloy substrate was ultrasonically cleaned with acetone for 15 minutes and dried, placed on the rack, and placed in the deposition equipment, and vacuumed to 3.0×10 -3 Below Pa, fill the cavity with high-purity argon gas, and perform Ar plasma etching and cleaning on the substrate with a bias voltage of -350V for 30 minutes.

[0027] (2) Deposit a layer of metal Cr as a seed layer on the substrate by DC magnetron sputtering, the argon gas pressure is 4mTorr, the bias voltage is -90kv, and the thickness of the seed layer is about 200nm.

[0028] (3) DC magnetron co-sputtering graphite target and Ag target, depositing Ag-C lubricating antibacterial functional layer: graphite target sputtering current 20A, voltage about 500V; metal Ag target sputtering current reduced from 2A to 0.1A, working gas It is Ar gas, the working pressure is 0.2Pa, the depo...

Embodiment 2

[0032] The preparation process in this embodiment is basically the same as in Example 1, and the preparation process of the substrate surface coating is basically the same as in Example 1, except that the heat treatment temperature in step (4) is 300 ° C, and the heat treatment time is 0.5 Hour.

[0033] The obtained coating is tested according to the provisions of GJB3032-97. When the film layer is rubbed against a G10 grade 9Cr18 steel ball with a diameter of 1.5mm by a ball-disk friction and wear tester, the friction coefficient is 0.10, and the sliding friction life is 7.0×10 5 r. The hardness of the coating measured by the nano-indentation method was 25GPa, and the adhesion force of the coating measured by the scratch method was 33N. The coating is tested according to GJB150.10A, the film layer has passed the 84d mold test, and the rating does not exceed level 1. After the fungus test, according to GJB2502.5-2006, carry out ultraviolet radiation treatment, after 3000ESH...

Embodiment 3

[0035] In this embodiment, the substrate is the same as in Embodiment 1. The preparation process of the substrate surface coating is basically the same as in Example 1, except that the sputtering current of the Ag target in step (3) is reduced from 2A to 1A, and the total thickness of the coating is 5 μm. The heat treatment temperature is 200° C., and the heat treatment time is 20 hours.

[0036] The obtained coating is tested according to the provisions of GJB3032-97. When the film layer is rubbed against a G10 grade 9Cr18 steel ball with a diameter of 1.5mm by a ball-disk friction and wear tester, the friction coefficient is 0.13 and the sliding friction life is 6.5×10 5r. The coating hardness measured by the nano-indentation method is 22GPa, and the coating adhesion force measured by the scratch method is 35N. The coating is tested according to GJB150.10A, the film layer has passed the 84d mold test, and the rating does not exceed level 1. After the fungus test, accordin...

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Abstract

A long-acting antibacterial solid lubricating film layer for a space environment and a preparation method therefor. The solid lubricating film layer comprises: a substrate, an Ag-containing diffusion layer, and a coating; the coating comprises: a Cr seed layer and an Ag-containing amorphous carbon film layer successively deposited on the substrate; the Ag-containing diffusion layer is located in the substrate adjacent to the Cr seed layer, and is formed from a matrix material and Ag atoms diffused and doped from the Cr seed layer into the matrix material. The Cr seed layer is deposited on the substrate, and then a magnetron co-sputtering graphite target and an Ag target are used to deposit a gradient transition Ag functional layer by means of adjusting and controlling the magnitude of a sputtering Ag current. Finally, heat treatment is performed to promote the diffusion of the Ag atoms in the coating to the substrate, thereby achieving an increase in the thickness of the Ag-containing antibacterial functional layer. After a long-term friction experiment, the obtained coating does not decrease in antibacterial level and achieves a long-acting antibacterial effect. The present invention is particularly suitable for a long-acting antibacterial lubrication component of a space station, and has large practical application requirements and good application prospects.

Description

technical field [0001] The invention relates to the technical field of surface coatings for space environments, in particular to a preparation method for long-acting antibacterial lubricating coatings for space use. Background technique [0002] In the space environment, the reliable operation and long-term stable service of aerospace components are the primary guarantees for the stable operation of spacecraft in orbit. However, bacteria and fungi in the outer space environment continuously cause corrosion damage to space components. On the one hand, material corrosion damage will cause damage and failure of space components, greatly reducing the service life of the spacecraft and reducing the reliability of the spacecraft. On the other hand, the continuous growth of bacteria and fungi will greatly affect the health of astronauts, and cannot provide a clean and reliable working and living environment for astronauts. As a new fulcrum for the development and exploration of sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/06C23C14/02
CPCC23C14/025C23C14/0605C23C14/165C23C14/352
Inventor 鞠鹏飞刘京周臧旭升唐丽娜朱雪龙周宏郭立杰
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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