Solid self-lubricating coating and preparation method thereof

A solid self-lubricating, lubricating layer technology, applied in coatings, lubricating compositions, metal material coating processes, etc., can solve the problems of limited size of coating materials, uneven distribution of graphene, poor friction stability, etc. Avoid system instability, high chemical bond strength, excellent wear resistance

Active Publication Date: 2022-04-15
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size of the coating material is limited and the distribution of graphene is not uniform, resulting in poor friction stability and easy interface adhesion under high loads.

Method used

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  • Solid self-lubricating coating and preparation method thereof

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Embodiment 1

[0032] Embodiment 1, a solid self-lubricating coating, the solid self-lubricating coating includes a bottom intrinsic support layer and a surface lubricating layer in order from bottom to top, wherein the surface lubricating layer is intrinsically supported at the bottom by a post-treatment method The surface of the layer is generated in situ; the bottom intrinsic support layer is composed of a hard diamond-like phase, composed of sp 2 and sp 3 Mixed hybrid carbon structure, where sp 3 The atomic percentage content is 25-70%; the surface lubricating layer is composed of a soft graphitized phase, and the soft graphitized phase is composed of sp 3 , sp 2 , sp hybridized carbon structure, where sp 2 The atomic percentage content is more than 90%, and the six-membered ring content in the ring structure is more than 60%.

[0033] The hard diamond-like phase has an amorphous structure, and the soft graphitized phase has an amorphous or quasi-crystalline structure.

[0034] Both...

Embodiment 2

[0040] Embodiment 2, this embodiment provides a kind of preparation method of solid self-lubricating coating, comprises the following steps:

[0041] S1 places the substrate after ultrasonic cleaning on the workpiece bracket in the vacuum chamber;

[0042] S2 adopts magnetron sputtering to deposit diamond-like solid phase, and the target material is high-purity graphite target. After the vacuum chamber pressure is adjusted to 2.7×10-3Pa, the magnetron sputtering source is turned on, 60sccm argon gas is introduced, and the sputtering current is 3.0 A, the substrate negative bias is 150V, the chamber pressure is 0.6Pa, and the sputtering time is 120min;

[0043] S3 Wait until the temperature of the vacuum chamber drops to room temperature, open the chamber, take out the substrate, and irradiate the surface with laser at a temperature of 600K and heat treatment time of 300s to realize the graphitization transformation of the surface structure and finally form the solid self-lubri...

Embodiment 3

[0045] Embodiment 3, this embodiment provides a kind of preparation method of solid self-lubricating coating, comprises the following steps:

[0046] S1 places the substrate after ultrasonic cleaning on the workpiece bracket in the vacuum chamber;

[0047] S2 adopts magnetron sputtering to deposit diamond-like solid phase, and the target material is high-purity graphite target. After the vacuum chamber pressure is adjusted to 2.7×10-3Pa, the magnetron sputtering source is turned on, 60sccm argon gas is introduced, and the sputtering current is 3.0 A, the substrate negative bias is 150V, the chamber pressure is 0.6Pa, and the sputtering time is 120min;

[0048] S3 Wait until the temperature of the vacuum chamber drops to room temperature, open the chamber, take out the substrate, and irradiate the surface with laser at a temperature of 1600K and heat treatment time of 60s to realize the graphitization transformation of the surface structure and finally form the solid self-lubri...

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Abstract

The invention discloses a solid self-lubricating coating and a preparation method thereof.The coating is formed by compounding a hard diamond-like phase serving as an intrinsic supporting layer and a soft graphitization phase serving as a surface lubricating layer, the hard diamond-like phase is formed by mixing sp2 and sp3 hybrid carbon structures, and the atomic percentage content of sp3 is 25-70%; the soft graphitized phase is mainly composed of an sp2 hybrid carbon structure, the atomic percentage content of sp2 is 90% or above, and the content of a six-membered ring structure is 60% or above; the composite lubricating coating has the advantages of high hardness, high bearing capacity, low abrasion, super-lubricity and friction coefficient lt; 0.01, the solid self-lubricating coating material can provide wear-resistant lubricating protection for a matrix or a workpiece in various environments such as high load and high speed, the preparation method is simple, the operability is high, industrial production is easy, and the solid self-lubricating coating material is excellent in comprehensive performance, long in service life and high in reliability.

Description

technical field [0001] The invention relates to the field of solid self-lubricating coatings, in particular to a solid self-lubricating coating and a preparation method thereof. Background technique [0002] Lubricating material technology is the most effective means to reduce friction, reduce or avoid wear, improve work efficiency, and extend equipment service life and reliability. Among them, "super-slip" technology, which describes the state where the friction force between two interfaces is almost zero, is one of the fastest-growing directions in the field of tribology in recent years. In this state, compared with traditional mechanical systems, the coefficient of friction is reduced by orders of magnitude (0.01 or less in engineering), which is expected to greatly reduce frictional energy consumption, material wear and frictional noise, and has become an important field in the field of tribology in human civilization. Another important contribution in history. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/35C23C14/58C10M103/02C10N50/08C10N30/06
Inventor 李晓伟乔江浩冯存傲陈凯亓健伟杜乃洲张德坤
Owner CHINA UNIV OF MINING & TECH
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