A kind of graphene-reinforced copper-based oil bearing material and its preparation method and application

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: 2020-10-27
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of graphene-reinforced copper-based oil bearing material and its preparation method and application
  • A kind of graphene-reinforced copper-based oil bearing material and its preparation method and application
  • A kind of graphene-reinforced copper-based oil bearing material and its preparation method and application

Examples

Experimental program
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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-impregnated bearing materials, and discloses a graphene-reinforced copper-based oil-impregnated bearing material, a preparation method and an application thereof. The oil-containing bearing material is obtained by adding copper powder into graphene oxide colloidal aqueous solution, stirring and reacting at room temperature, filtering and drying to obtain graphene-coated copper powder; cold-pressing the graphene-coated copper powder to obtain an embryo body, The green body is sintered in a protective atmosphere, and after natural cooling, a porous graphene / copper composite material is obtained; the porous graphene / copper-based composite material is placed in a special lubricating oil for oil-impregnated bearings, and soaked under a certain negative pressure until completely Soaked and naturally cooled. The graphene-reinforced copper-based oil-bearing bearing material prepared by the invention has the advantages of less wear, good bearing capacity, high oil content and stable lubrication performance, and effectively solves the problem that graphene nanosheets are difficult to uniformly disperse in the copper matrix. It is used in the fields of audio machinery, household electrical appliances, office machinery and transportation 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 Patents(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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