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Copper-tungsten disulfide self-lubricating composite material with layered structure, preparation method and application

A tungsten disulfide, layered structure technology, applied in lubricating compositions, base materials, petroleum industry, etc., can solve the problems of small area and low alignment of porous BN scaffolds and composite materials layered structure area

Active Publication Date: 2021-10-29
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Bouille et al. used the ice crystal template method to realize the directional assembly of flaky BN particles with a diameter of 8 and a thickness of 1; then Xu Jian et al. vacuum-impregnated polydimethylsiloxane (PDMS) to obtain a layered BN particle. hBN / PDMS composites with a structure and oriented arrangement of particles; but the porous BN scaffolds obtained above and the layered structure of the composite material have a smaller area and lower orientation

Method used

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  • Copper-tungsten disulfide self-lubricating composite material with layered structure, preparation method and application
  • Copper-tungsten disulfide self-lubricating composite material with layered structure, preparation method and application
  • Copper-tungsten disulfide self-lubricating composite material with layered structure, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 24.4g WS to the mixing tank 2 Powder (average particle size: 5.0μm), 100g deionized water and 2.0g gelatin, ball milling and mixing for 20h (ball milling speed: 100rpm, mass ratio of ball to material: 2:1) to get WS with stable performance 2 Water-based slurry: Pour the water-based slurry into a frozen mold containing a wedge-shaped mold, and then put it into a directional temperature field (the bottom temperature is set to -30°C, and the top temperature is set to 5°C) for directional solidification. The samples were placed in a vacuum freeze dryer for deicing. The dried green material is cut into 12×35×24mm 3 The cuboid, and the organic copper paste with a mass fraction of 60% is infiltrated by vacuum pressure method, and the porous WS infiltrated with copper paste is 2 The green body material is put into a hydrogen furnace for organic matter removal and copper powder reduction, heated to 400°C at a heating rate of 5°C / min and kept for 2 hours; / min rate increas...

Embodiment 2

[0040] Add 15.5g WS to the mixing tank 2 Powder (average particle size: 5.0μm), 100g deionized water and 2.0g chitosan, ball milling and mixing for 20h (ball milling speed: 100rpm, mass ratio of ball to material: 2:1) to get WS with stable performance 2 Water-based slurry: Pour the slurry into a freezing mold containing a wedge-shaped mold, and then put it into a directional temperature field (the bottom temperature is set to -40°C, and the top temperature is 5°C) for directional solidification. into a vacuum freeze dryer for deicing. The dried green material is cut into 12×35×24mm 3 The rectangular parallelepiped is infiltrated into organic copper-tin alloy slurry (tin content 10.0%) with a mass fraction of 50% by vacuum air pressure method, and the porous WS infiltrated with copper-tin particles 2 The green body material is put into a hydrogen furnace to remove organic matter and reduce copper powder, and is heated to 350 °C at a heating rate of 5 °C / min for 2 hours; The ...

Embodiment 3

[0042] Add 24.4g WS to the mixing tank 2 Powder (average particle size: 5.0μm), 100g deionized water and 2.0g polyvinyl alcohol, ball milling and mixing for 20h (ball milling speed: 100rpm, mass ratio of ball to material: 2:1) to get WS with stable performance 2 Water-based slurry: Pour the slurry into a freezing mold containing a wedge-shaped mold, and then put it into a directional temperature field (the temperature at the bottom is set to -30°C, and the temperature at the top is 5°C) for directional solidification, and the obtained sample is placed into a vacuum freeze dryer for deicing. The dried green material is cut into 12×35×24mm 3 The rectangular parallelepiped is infiltrated into the organic copper-nickel alloy slurry (nickel content 15.0%) with a mass fraction of 70.0% by vacuum pressure method, and the porous WS infiltrated with copper-nickel particles 2 The green body material is put into a hydrogen furnace for organic matter removal and copper powder reduction,...

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Abstract

The invention discloses a copper-tungsten disulfide (Cu-WS2) self-lubricating composite material with a layered structure, a preparation method and application thereof, and belongs to the technical field of metal-based self-lubricating composite materials. A tungsten disulfide layer and a copper layer in the Cu-WS2 composite material have mutually crossed and superposed morphological characteristics, the thickness of a dense copper layer in the composite material is 10-100 microns, and the thickness of the tungsten disulfide layer is 5-15 microns. A porous tungsten disulfide support with a long-range ordered and layered structure is obtained through a bidirectional freezing technology, organic copper and alloy slurry of the organic copper are infiltrated into the tungsten disulfide support through vacuum impregnation, and the Cu-WS2 composite material is prepared from an obtained infiltrated green body through SPS sintering. The copper-based composite material with different copper layer and tungsten disulfide layer thicknesses can be obtained by controlling the solid phase content in the tungsten disulfide support preparation process and the solid phase content of the organic copper paste. The method is suitable for preparing the composite material with the layered structure characteristic.

Description

technical field [0001] The invention relates to the technical field of preparation of metal-based self-lubricating composite materials, in particular to a copper-tungsten disulfide self-lubricating composite material with a layered structure, a preparation method and an application. Background technique [0002] Metal-based self-lubricating composite materials usually have the characteristics of excellent mechanical properties and wear resistance of metal matrix materials, good lubrication and anti-friction properties of solid lubricants, and high material designability. They are used in automobiles, electronics, aviation, instruments, etc. It has broad application prospects in industry. Copper-based solid lubricating material is one of the commonly used metal-based self-lubricating materials. It has good thermal conductivity, electrical conductivity, corrosion resistance, excellent process performance and moderate price. It is often used in electrical contacts, automotive e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M103/00C10M177/00C10N50/08C10N40/14C10N40/25C10N40/20
CPCC10M103/00C10M177/00C10M2201/053C10M2201/0653C10N2050/08C10N2040/17C10N2040/255C10N2040/246
Inventor 吴集思杨成刚
Owner NANCHANG HANGKONG UNIVERSITY
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