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Copper-based self-lubricating composite material and preparation method thereof

A composite material and self-lubricating technology, which is applied in the field of material processing and powder metallurgy, can solve the problems of complex preparation process, high porosity and low density of composite materials, so as to improve the compactness of the structure, good wear resistance and avoid pores Effect

Active Publication Date: 2013-03-27
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation process of copper-based composite materials mostly adopts the cold-press sintering method, but the prepared composite materials have high porosity and low density, and require subsequent hot-press densification treatment, making the preparation process complicated

Method used

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  • Copper-based self-lubricating composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] The present embodiment copper base self-lubricating composite material is made up of the following components by weight percentage:

[0030] 2.5% Yttrium Barium Copper Oxide (YBa 2 Cu 3 o 7-x ),

[0031] The balance is copper, and unavoidable impurities.

Embodiment 2

[0033] The present embodiment copper base self-lubricating composite material is made up of the following components by weight percentage:

[0034] 2% Yttrium Barium Copper Oxide (YBa 2 Cu 3 o 7-x ) powder with a particle size of 20nm and an x ​​value of 0

[0035] The balance is copper powder (commercially available), and the copper powder is passed through a 500-mesh sieve.

[0036] and unavoidable impurities.

[0037] In this embodiment, yttrium barium copper oxide (YBa 2 Cu 3 o 7-x ) The preparation method of powder comprises the steps:

[0038] (1) Weigh Y(NO 3 ) 3 , Ba(NO 3 ) 2 , Cu(NO 3 ) 2 , add water and dissolve to obtain an aqueous solution, add polyethylene glycol accounting for 3% of the total mass of the three raw materials to obtain solution A, and then prepare an aqueous solution with a concentration of 0.06g / ml as solution B with oxalic acid;

[0039] (2) Add solution B to solution A drop by drop and mix evenly. Add too much solution B so that Y ...

Embodiment 3

[0047] The present embodiment copper base self-lubricating composite material is made up of the following components by weight percentage:

[0048] 2.5% Yttrium Barium Copper Oxide (YBa 2 Cu 3 o 7-x ) powder with a particle size of 300nm and an x ​​value of 0.3,

[0049] The balance is copper powder, and the copper powder passes through a 500-mesh sieve.

[0050] and unavoidable impurities.

[0051] In this embodiment, yttrium barium copper oxide (YBa 2 Cu 3 o 7-x ) The preparation method of powder comprises the steps:

[0052] (1) Weigh Y(NO 3 ) 3 , Ba(NO 3 ) 2 , Cu(NO 3 ) 2 , add water and dissolve to obtain an aqueous solution, add polyethylene glycol accounting for 4% of the total mass of the three raw materials to obtain solution A, and then prepare an aqueous solution with a concentration of 0.08g / ml as solution B with oxalic acid;

[0053] (2) Add solution B to solution A drop by drop and mix evenly. Add too much solution B so that Y 3+ 、Ba 2+ 、Cu 2+ Co...

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Abstract

The invention discloses a copper-based self-lubricating composite material and a preparation method of the copper-based self-lubricating composite material, and belongs to the technical field of material processing and powder metallurgy. The composite material comprises the following components in percentage by weight: 2 to 4% of yttrium barium copper oxide (YBa2Cu3O7-x), and the balance of copper and inevitable impurities, wherein the yttrium barium copper oxide (YBa2Cu3O7-x) is a good solid lubricant and has the characteristics of superconductivity, thermal stability, friction reducing performance and wear resistance. According to the copper-based self-lubricating composite material and the preparation method, the YBa2Cu3O7-x powder with granularity of 20 to 500 nanometers and the copper powder screened by a sieve of 500 meshes are preferred; the raw materials are mixed and initially pressed, and then processed by the technical means combining processes of sectional heating, sectional pressurizing, sectional cooling and pressurizing, and therefore, the density of the structure of the composite material is improved, the defects such as air holes and cracks are prevented in the composite material; and the prepared composite material is excellent in physical properties, mechanical properties and frictional wear performance.

Description

technical field [0001] The invention relates to a copper-based composite material, in particular to a copper-based self-lubricating composite material and a preparation method thereof, belonging to the technical fields of material processing and powder metallurgy. Background technique [0002] The copper-based composite material prepared by the composite material method can rely on the characteristics of the enhanced components to realize the recombination of the properties of the composite material. It not only exerts the synergistic effect of the matrix and the reinforcement, increases the comprehensive performance that cannot be achieved by a single component material, but also has a large degree of design freedom, so it is a high-performance new material with great development potential. Copper-based composite materials have high strength, electrical conductivity and thermal conductivity similar to pure copper, and are a new type of material with broad application prospe...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/05
Inventor 王爱琴崔利可谢敬佩李继文孙浩亮王文焱李洛利
Owner HENAN UNIV OF SCI & TECH
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