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

A technology of tungsten disulfide and layered structure, which is applied in the direction of lubricating composition, base material, petroleum industry, etc., and can solve the problems of small area and low orientation of the layered structure area of ​​porous BN scaffolds and composite materials

Active Publication Date: 2022-07-15
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 is 5.0μm), 100g deionized water and 2.0g gelatin, after ball milling and mixing for 20h (ball milling speed: 100rpm, mass ratio of ball to material is 2:1) to obtain stable WS 2 Water-based slurry; pour the water-based slurry into a freezing mold containing a wedge-shaped mold, and then put it into a directional temperature field (the temperature at the bottom end is set to -30°C, and the temperature at the top end is 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 was infiltrated into the organic copper paste with a mass fraction of 60% by the vacuum pressure method, and the porous WS infiltrated with the copper paste was infiltrated. 2 The green material was put into a hydrogen furnace for organic removal and copper powder reduction, and heated to 400°C at a heating rate of 5°C / min for 2 hours...

Embodiment 2

[0040] Add 15.5g WS to the mixing tank 2 Powder (average particle size is 5.0μm), 100g deionized water and 2.0g chitosan, after ball milling and mixing for 20h (ball milling speed: 100rpm, mass ratio of ball to material: 2:1) to obtain 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 end is set to -40°C, and the temperature at the top end is 5°C) for directional solidification, and the obtained sample is placed in De-icing was carried out in a vacuum freeze dryer. The dried green material is cut into 12×35×24mm 3 The cuboid was infiltrated into the organic copper-tin alloy slurry with a mass fraction of 50% (tin content 10.0%) by the vacuum pressure method, and the porous WS infiltrated with copper-tin particles was infiltrated. 2 The green body material is put into a hydrogen furnace for organic removal and copper powder re...

Embodiment 3

[0042] Add 24.4g WS to the mixing tank 2 Powder (average particle size is 5.0μm), 100g deionized water and 2.0g polyvinyl alcohol, after ball milling for 20h (ball milling speed: 100rpm, mass ratio of balls: 2:1) to obtain stable WS 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 end is set to -30°C and the temperature at the top end is 5°C) for directional solidification, and the obtained sample is placed De-icing was carried out in a vacuum freeze dryer. The dried green material is cut into 12×35×24mm 3 The cuboid was infiltrated into the organic copper-nickel alloy slurry with a mass fraction of 70.0% (the nickel content was 15.0%) by the vacuum pressure method, and the porous WS infiltrated with copper-nickel particles was infiltrated. 2 The green material is put into a hydrogen furnace for organic removal and copper powder reduction, and heated ...

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Abstract

The invention discloses a layered structure of copper-tungsten disulfide (Cu-WS) 2 ) self-lubricating composite material, preparation method and application, belonging to the technical field of metal-based self-lubricating composite material, Cu‑WS 2 The tungsten disulfide layer and the copper layer in the composite material show the morphological characteristics of overlapping each other, the thickness of the dense copper layer in the composite material is 10-100 μm, and the thickness of the tungsten disulfide layer is 5-15 μm. A porous tungsten disulfide scaffold with long-range order and layered structure was obtained by bidirectional freezing technology, and the organic copper and its alloy slurry were infiltrated into the tungsten disulfide scaffold by vacuum impregnation. The obtained infiltrated green body was prepared by SPS sintering. Cu‑WS 2 composite material. By controlling the solid phase content of the tungsten disulfide scaffold and the solid phase content of the organic copper paste, copper-based composite materials with different thicknesses of copper layers and tungsten disulfide layers can be obtained. The present invention is suitable for preparing composite materials with layered structural properties.

Description

technical field [0001] The invention relates to the technical field of metal-based self-lubricating composite material preparation, 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. 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 engine brushes, Spot welding electrode working end, continuous casting mach...

Claims

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Application Information

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Patent Type & Authority Patents(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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