Particle directional arrangement reinforced copper-based self-lubricating composite material and preparation method thereof

A technology of directional alignment and composite materials, which is applied in the field of particle directional alignment reinforced copper-based self-lubricating composite materials and its preparation, can solve the problems of particle alignment defects and poor uniformity of tissue structure, and achieve a reduction in wear rate and a simple preparation process Effect

Pending Publication Date: 2021-12-10
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: Shen et al. used the ice crystal template method to realize the directional assembly of h-BN particles and compounded the second phase (polydimethylsiloxane) by impregnation method, and obtained the heat conduction along the direction of parallel particle arrangement. The rate is significantly improved, but the uniformity of the structure of the material is poor and there are certain defects in the orientation of the particles

Method used

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  • Particle directional arrangement reinforced copper-based self-lubricating composite material and preparation method thereof
  • Particle directional arrangement reinforced copper-based self-lubricating composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042](1) Prepare a mixed slurry with uniform particle dispersion

[0043] Add 6.2gWS to the mixing tank 2 powder (average particle size 5.0μm), 39.8g Cu powder (purity greater than 99.0%, average particle size 10.0μm), 0.2g dispersant (polyvinylpyrrolidone) and 50.0g deionized water for ball milling for 2h (ball milling speed is 100rpm, ball material ratio is 2:1);

[0044] Simultaneously, add 50.0g deionized water and 2.5g gelatin in the beaker and put into 60 ℃ drying box and dissolve, after it dissolves completely, pour into the mixing tank above and carry out mixed ball milling (ball milling speed is: 100rpm, ball Material ratio is 2:1), after ball milling for 20 hours, a mixed slurry with stable properties was obtained.

[0045] (2) Preparation of porous green body material

[0046] Pour the mixed slurry into a freezing mold containing a wedge-shaped mold (at an angle of 15°), and place the frozen mold containing the slurry in a directional temperature field (the temp...

Embodiment 2

[0055] (1) Prepare a mixed slurry with uniform particle dispersion

[0056] Add 5.1gMoS to a mixing tank in sequence 2 (average particle size 5.0μm), 37.5gCu 30 Ni alloy powder (the mass content of nickel is 30.0%, particle size is 5~25 μm), 0.2g dispersant (polyvinylpyrrolidone) and 50.0g deionized water are carried out ball milling 3h (ball milling speed is: 150rpm, the mass ratio of ball material is: 3:1);

[0057] At the same time, add 1.0g epoxy resin and 50.0g deionized water into a 100ml beaker and put it into a drying oven at 60°C for dissolving. After it dissolves completely, pour it into the above mixing tank for mixing ball milling (ball milling speed For: 80rpm, the mass ratio of ball to material is 3:1), after ball milling for 22 hours, a stable mixed slurry with good rheological properties can be obtained.

[0058] (2) Preparation of porous green body material

[0059] Pour the mixed slurry into a freezing mold containing a wedge-shaped mold (at an angle of 5...

Embodiment 3

[0066] (1) Prepare a mixed slurry with uniform particle dispersion

[0067] Add 6.2gWS to a mixing tank in sequence 2 (average particle size 50.0μm), 1.3gMoS 2 Powder (average particle size is 0.1 μm), 37.5g Cu powder (average particle size is 10.0 μm), 0.2g dispersant (polyvinylpyrrolidone) and 50.0g deionized water are ball milled for 4h (ball milling speed is 50rpm, ball-to-material ratio is 5:1 );

[0068] At the same time, add 10g of a mixture of polyvinyl alcohol and gelatin (the mass ratio of polyvinyl alcohol to gelatin is 1:1) and 50.0g of deionized water into a 100ml beaker, put it in a drying oven at 60°C for dissolution, and wait for it to dissolve After completion, pour it into the above mixing tank for mixing ball milling (ball milling speed: 100rpm, mass ratio of ball to material: 5:1), and after 23 hours of ball milling, a mixed slurry with stable performance can be obtained.

[0069] (2) Preparation of porous green body material

[0070] Pour the mixed slu...

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Abstract

The invention discloses a particle directional arrangement reinforced copper-based self-lubricating composite material and a preparation method thereof and belongs to the technical field of metal-based composite material preparation. The preparation method comprises the steps that step1, mixed slurry with uniformly dispersed particles is prepared; step2, directional solidification of the slurry and removal of ice crystals are performed; step3, green body pressing and forming, organic matter removing in a hydrogen atmosphere and reduction treatment on metal copper particles are performed; and step4, sintering is performed, and the reinforced copper-based self-lubricating composite material with directionally-arranged particles is obtained. The preparation method has the advantages of being simple in operation, less in process, low in cost, free of special requirement for equipment and the like, and the particle size range of used reinforced phase particles is wide; and the preparation method is suitable for preparing the composite material of which the particles are uniformly distributed and are directionally arranged in a matrix, the material has typical mechanical property and friction property anisotropy, and the friction property along a parallel surface is greatly improved.

Description

technical field [0001] The invention relates to the technical field of preparation of metal-based composite materials, in particular to a copper-based self-lubricating composite material reinforced with directional arrangement of particles and a preparation method thereof. Background technique [0002] Metal-based self-lubricating composite materials not only have good thermal conductivity, excellent mechanical properties and wear resistance of metal materials, but also have excellent lubrication and anti-friction properties of solid lubricants. It has broad application prospects. Among them, copper-based self-lubricating composite materials are often used as spot welding electrode workpieces, bearing bushes and integrated circuits due to their low manufacturing cost, good corrosion resistance, and easy processing, and the composite materials have good mechanical properties and friction and wear properties. Lead frames, contact elements in electronic communication devices a...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C22C9/00C22C9/06C22C1/05C22C1/10C22C32/00B22F9/04B22F3/11B22F3/105B22F3/02B22F3/10
CPCC22C9/00C22C9/06B22F9/04B22F3/02B22F3/1021B22F3/11C22C32/0089B22F3/105C22C1/05B22F2009/043B22F2003/1051
Inventor吴集思杨成刚
OwnerNANCHANG HANGKONG UNIVERSITY