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Ni-P amorphous/MoS2 composite membrane for preventing cold welding effect under high vacuum environment

A composite film and high vacuum technology, applied in the field of composite film, can solve the problems of unreported, unfavorable films, etc., and achieve the effects of simple process, low price and low preparation cost

Inactive Publication Date: 2010-02-10
YANSHAN UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

MoS 2 The shedding and damage of the film is unfavorable for the long-term anti-cold welding requirements
[0003] So far, the Ni-P amorphous alloy / nano-MoS that can be effectively used to prevent the space cold welding effect 2 Research on composite membranes has not been reported

Method used

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  • Ni-P amorphous/MoS2 composite membrane for preventing cold welding effect under high vacuum environment
  • Ni-P amorphous/MoS2 composite membrane for preventing cold welding effect under high vacuum environment
  • Ni-P amorphous/MoS2 composite membrane for preventing cold welding effect under high vacuum environment

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Embodiment 1

[0010] Space separation system clasps require surface treatment to prevent space vacuum cold welding and to be able to work for a long time. Therefore, a Ni-P amorphous / MoS2 composite film was prepared on the surface of the amorphous alloy to prevent the cold welding effect in a high vacuum environment.

[0011] After degreasing and acid etching, the amorphous alloy is plated on the substrate by electroless plating method to prevent cold welding effect in high vacuum environment Ni-P amorphous / M o S 2 composite film. Its plating method is as follows:

[0012] (1) prepare electroless plating solution and its composition is: nickel sulfate 22g / L, sodium hypophosphite 25g / L, sodium acetate 20g / L, sodium citrate 35g / L, lactic acid 6ml / L, nanomolybdenum disulfide 5g / L ;Adjust the pH value of the plating solution with ammonia water, pH=8;

[0013] (2) Degreasing, activation, and pre-plating of plated parts;

[0014] (3) The plating solution is heated to 90°C, and the plating ti...

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Abstract

The invention discloses a Ni-P amorphous alloy / MoS2 composite membrane for preventing cold welding effect on the surface of an amorphous alloy and aluminum alloy moving part. The chemical plating or the electroplating method is adopted for preparing the nickel-based amorphous alloy composite membrane containing nano-molybdenum disulfide in a plating layer. The composite membrane can prevent the vacuum cold welding action of the moving part or a contact coupling friction pair in a spacecraft, thereby having wide application prospects in the fields of aerospace, vacuum devices and the like. Thepreparation of the composite membrane does not need complicated equipment and further has the advantages of simple process, broad material resources, low price, low preparation cost and no pollution during production process, thereby being applicable to industrial production.

Description

technical field [0001] The invention relates to a composite film for preventing the vacuum cold welding effect between the surfaces of bulk amorphous alloy or aluminum alloy moving components in a high vacuum environment. In particular, a Ni-P amorphous / M o S 2 Composite film. Background technique [0002] A spacecraft is subjected to a vacuum higher than 10 during its orbit in space -5 The magnitude of Pa. Studies have shown that in the above-mentioned high-vacuum environment, the metal surfaces of two clean mechanical parts that are in contact with each other are very prone to adhesion, resulting in cold welding. Cold welding is different from friction and wear. Even if there is vacuum cold welding between two static contact surfaces, there is no friction and wear at this time; between two contact dynamic surfaces, due to the existence of cold welding And aggravate the friction and wear phenomenon. Cold welding is a unique phenomenon in a vacuum environment, but fric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16C23C18/36C23C18/50
Inventor 于金库马明臻刘日平常丹华
Owner YANSHAN UNIV
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