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A Tribocatalytic Design Method for Realizing Ultra-low Friction of Carbon Thin Films

A technology of ultra-low friction and design method, which is applied in the direction of nano-carbon, mechanical equipment, engine lubrication, etc., can solve the problems of short wear life, easy oxidation, and restriction of tribological performance of diamond-like carbon film, and realize the frictional contact area , low cost, improved effect of high friction coefficient

Active Publication Date: 2021-11-12
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-dimensional layered materials (single-layer graphene, molybdenum disulfide and hexagonal boron nitride) are good solid lubricant materials due to the weak van der Waals interaction between layers and good tribological properties. They are used in electrochemistry, machinery, aerospace, etc. The field has a wide range of application prospects, but there are disadvantages such as easy oxidation and short wear life.
The disadvantage is that only when sp in the diamond-like carbon film 2 and sp 3 The super-slip properties can only be exhibited when the bond ratio, active σ bond and H content meet certain conditions, and the tribological properties of the diamond-like carbon film are restricted by many conditions (dual material, ambient atmosphere and friction process, etc.)
[0005] In the past, the methods to solve the problem of frictional failure of diamond-like films mainly focused on the doping of other elements (N, P, S) and the introduction of micro-nano structures (graphite-like, fullerene-like, carbon onion), but none of them could meet the requirements for lubrication. Service requirements for mechanical components with extremely high demands

Method used

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  • A Tribocatalytic Design Method for Realizing Ultra-low Friction of Carbon Thin Films
  • A Tribocatalytic Design Method for Realizing Ultra-low Friction of Carbon Thin Films
  • A Tribocatalytic Design Method for Realizing Ultra-low Friction of Carbon Thin Films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 A tribocatalytic design method to achieve ultra-low friction of carbon thin films: firstly, disperse 0.125 g 50 nm Cu nanoparticles in 1 L of absolute ethanol, and ultrasonically disperse for 30 min to obtain a Cu nanoparticle solution; then use a 1 mL dropper to 8 drops / 2.5 cm of Cu nanoparticles solutions with different concentrations 2 Spin coating on the surface of an amorphous carbon-based film with a hydrogen content of 20 at.% and a surface roughness of ≤5 nm. After vacuum evaporation of absolute ethanol, a uniformly distributed coating of metal nanoparticles can be obtained.

[0019] The obtained metal nanoparticle coating and aluminum oxide dual balls constitute a friction pair, the lower module is fixed, and the upper module is rotated, and the friction experiment is carried out in UMT under vacuum.

[0020] The Cu metal nanoparticle coating and the dual ball form a friction pair. Through the TEM and Raman analysis of the wear debris, it is found tha...

Embodiment 2

[0021] Example 2 A tribocatalytic design method for realizing ultra-low friction of carbon thin films: firstly, disperse 0.25 g of 100 nm Ni nanoparticles in 1 L of absolute ethanol, and ultrasonically disperse for 30 min to obtain a Ni nanoparticle solution; then use a 1 mL dropper to Ni nanoparticle solutions with different concentrations were placed in 10 drops / 2.5 cm 2 Spin-coat on the surface of a fullerene-like carbon-based film with a hydrogen content of 15 at.% and a surface roughness of ≤5 nm. After evaporating absolute ethanol in a vacuum, a uniformly distributed coating of metal nanoparticles can be obtained.

[0022] The obtained metal nanoparticle coating and aluminum oxide dual balls form a friction pair, the lower module is fixed, the upper module is rotated, and the UMT is in the N 2 The friction experiment was carried out under the atmosphere.

[0023] On the Raman spectrum of the fullerene-like carbon-based film, there is an obvious D peak (1360 cm -1 ) and...

Embodiment 3

[0024] Example 3 A tribocatalytic design method for achieving ultra-low friction of carbon thin films: firstly, disperse 0.025 g of 200 nm Co nanoparticles in 1 L of absolute ethanol, and ultrasonically disperse for 30 min to obtain a Co nanoparticle solution; then use a 1 mL dropper to Ni nanoparticle solutions of different concentrations were placed in 12 drops / 2.5 cm 2 Spin coating on the surface of graphite-like carbon-based film with hydrogen content of 10 at.% and surface roughness ≤ 5 nm. After vacuum evaporation of absolute ethanol, a uniformly distributed coating of metal nanoparticles can be obtained.

[0025] The obtained metal nanoparticle coating and silicon carbide form a friction pair, the lower module is fixed, the upper module is rotated, and the reciprocating friction experiment is carried out on the CSM under the condition of 40% atmospheric humidity.

[0026] The orderly transformation of the thin film structure to graphene can also be observed, forming a b...

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Abstract

The invention relates to a method for designing friction catalysis to realize ultra-low friction of a carbon film. The method refers to: first adding metal nanoparticles into absolute ethanol, ultrasonically dispersing to obtain a metal nanoparticle solution; and then spin-coating the metal nanoparticle solution On the surface of the carbon-based film, a metal nanoparticle coating is obtained; finally, mechanical friction stirring is used to promote the mixing of carbon-based film wear debris and metal nanoparticles, and a ball-like particle coating with embedded metal nanoparticles and coated graphene is obtained. . The invention introduces the metal nano-particles as a catalyst into the friction interface of the carbon-based film, and improves the problems of high friction coefficient and environmental sensitivity in a single friction process through the synergistic effect of friction and catalysis.

Description

technical field [0001] The invention relates to the technical field of surface engineering metal catalysis and the like, in particular to a friction catalysis design method for realizing ultra-low friction of a carbon film. Background technique [0002] With the development of high precision, high integration and high reliability of mechanical systems, the surface and interface effects of moving parts of mechanical systems are becoming more and more prominent, and the requirements for friction and wear are becoming more and more stringent. At the same time, according to reliable data, friction causes 1 / 3 of the world's one-time energy consumption, and 60% of component damage is caused by wear and tear. The direct economic loss caused by the two accounts for about 5% to 7% of the national GDP. Calculated on the basis of 5%, in 2019, the loss caused by friction and wear alone in my country will be as high as 4.95 trillion yuan. Therefore, further reducing friction, reducing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M125/00C10M125/02C10M125/04C10M103/00C10M103/02C10M103/04B82Y30/00B82Y40/00C01B32/19F16N15/00C10N30/06C10N50/08C10N50/02
CPCB82Y30/00B82Y40/00C10M103/00C10M103/02C10M103/04C10M125/00C10M125/02C10M125/04C10M2201/041C10M2201/0413C10M2201/05C10M2201/053C01B32/19F16N15/00
Inventor 李瑞云张俊彦杨兴侯德良孙朝杰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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