Graphene-reinforced copper based oil-bearing material and preparation method and application thereof

A bearing material and graphene technology, which is applied in transportation and packaging, metal processing equipment, etc., can solve the problems of weakening the mechanical properties of the metal matrix of oil-bearing bearings, increasing the amount of graphene, and increasing the production cost, so as to improve the supply/suction efficiency, Improve oil content and good bearing capacity

Active Publication Date: 2018-11-30
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene is inherently prone to agglomeration due to the large specific surface area and strong interlamellar forces
Agglomerated graphene not only weakens the mechanical properties of the metal matrix of the oil-bearing bearing, but also increases the amount of graphene and increases the production cost

Method used

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  • Graphene-reinforced copper based oil-bearing material and preparation method and application thereof
  • Graphene-reinforced copper based oil-bearing material and preparation method and application thereof
  • Graphene-reinforced copper based oil-bearing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 20g of copper powder (particle size: 20±10μm) into 2L of graphene oxide colloidal aqueous solution (concentration: 0.1mg / mL), stir and react at room temperature for 0.5h, filter and dry the product at 80°C under vacuum to obtain graphene-coated Copper-clad powder, wherein the content of graphene is 0.5wt.% of the graphene-coated copper powder. figure 1 For the surface topography SEM photo of the graphene-coated copper powder of gained, from figure 1 It can be seen that graphene nanosheets are uniformly deposited along the surface of copper powder.

Embodiment 2

[0032] The difference from Example 1 is that the graphene oxide concentration in the graphene oxide colloidal aqueous solution is 0.2 mg / mL, the stirring reaction time is 1 h, and the graphene content in the graphene-coated copper powder is 1.0 wt.%.

Embodiment 3

[0034] The difference from Example 1 is that the particle size of the copper powder is 30±10 μm, the concentration of the graphene oxide colloidal aqueous solution is 0.05 mg / mL, and the volume is 4 L. figure 2 For the surface topography SEM photo of the graphene-coated copper powder of gained, from figure 2 It can be seen that graphene nanosheets are uniformly deposited along the surface of copper powder.

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Abstract

The invention belongs to the technical field of oil-bearing materials and discloses a graphene-reinforced copper based oil-bearing material and a preparation method and application thereof. The oil-bearing material is of graphene-coated copper powder obtained by adding copper powder in a water solution of oxidized-graphene colloids by filtering and drying after room temperature stirring reaction;subjecting the graphene-coated copper powder to cold pressing to form a blank body and placing the blank body for sintering in a protective atmosphere to obtain a porous graphene / copper composite material after natural cooling; placing the porous graphene / copper composite material into oil-bearing specialized lubricating oil for soaking till complete infiltration under a certain negative pressureprior to cooling the oil-bearing specialized lubricating oil naturally. The graphene-reinforced copper based oil-bearing material has the advantages of less abrasion, good bearing force, high oil content and stabile lubricating property, the problem that a graphene nano-sheet is difficult to be uniformly dispersed in a copper matrix is effectively solved, and the graphene-reinforced copper based oil-bearing material is applicable to the fields of audio machinery, home appliance machinery, office machinery and transport machinery bearings.

Description

technical field [0001] The invention belongs to the technical field of oil-impregnated bearing materials, and in particular relates to a graphene-reinforced copper-based oil-impregnated bearing material and its preparation method and application. Background technique [0002] Sintered metal oil-impregnated bearings are a type of sliding bearings that use the porosity of the sintered body to impregnate lubricating oil in the pores and can supply oil by themselves. When the bearing rotates, the lubricating oil stored in the connecting pores seeps out of the friction surface of the oil-impregnated bearing due to heat and pump action. When the bearing stops rotating, the lubricating oil returns to the inside of the oil-impregnated bearing. Therefore, the internal interconnection of oil bearings, pores of appropriate size and high oil content are important parameters to ensure the formation of a stable oil film and the long-term use of the bearing. Because the copper matrix has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F3/11B22F3/26B22F5/10
CPCB22F3/11B22F3/26B22F5/106B22F2998/10B22F1/16B22F3/02
Inventor 陈福县麦永津凌洪杰揭晓华张留艳
Owner GUANGDONG UNIV OF TECH
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