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A wear-resistant copper-alumina composite material and its preparation method

A composite material, copper alumina technology, applied in the field of copper alloy, can solve the problems of poor wear resistance, etc., and achieve the effect of good wear resistance, high hardness and compact structure

Active Publication Date: 2022-02-22
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wear-resistant copper-alumina composite material, which solves the problem of poor wear resistance in the prior art

Method used

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Examples

Experimental program
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preparation example Construction

[0028] A method for preparing a wear-resistant copper-alumina composite material, comprising the following steps:

[0029] Step 1. Preparation of alumina particles

[0030] Step 1.1, fully dissolve aluminum sulfate hydrate in deionized water, and obtain 0.1-0.2mol / L aluminum sulfate solution after ultrasonic vibration;

[0031] Step 1.2, adding 2-3 wt% polyethylene glycol and 0.5-0.8 mol / L ammonia solution to the aluminum sulfate solution, mixing fully and stirring evenly to obtain a solution;

[0032] Step 1.3, transfer the solution to the reaction kettle, and place the reaction kettle in an electric blast drying oven to heat at 120-150°C and keep it warm for 12-15 hours;

[0033] Step 1.4. Take out the reaction kettle and cool it down to room temperature naturally, wash the precipitate in the reaction kettle with deionized water and absolute ethanol, put it in a vacuum oven at 80-90°C for 15-20 minutes to constant weight, grind it thoroughly and dry it again , to obtain al...

Embodiment 1

[0044] Step 1. Fully dissolve aluminum sulfate hydrate in deionized water, and obtain a 0.1mol / L aluminum sulfate solution after ultrasonic vibration; add 2wt% polyethylene glycol and 0.5mol / L ammonia solution to the aluminum sulfate solution, mix well and stir Evenly, the solution was obtained; the solution was transferred to the reaction kettle, and the reaction kettle was heated at 120°C in an electric blast drying oven, and kept for 12 hours; the reaction kettle was taken out and cooled to room temperature naturally, and the precipitate in the reaction kettle was treated with deionized water Wash with absolute ethanol, dry in a vacuum oven at 80° C. for 15 minutes to constant weight, fully grind and dry again to obtain alumina particles.

[0045]Step 2. Dissolve aluminum chloride hydrate in a mixed solution of absolute ethanol and DMF to obtain a mixed solution with a concentration of aluminum chloride of 0.65 mol / L, and the volume ratio of absolute ethanol and DMF is 1:1.1...

Embodiment 2

[0050] Step 1. Fully dissolve aluminum sulfate hydrate in deionized water, obtain 0.15mol / L aluminum sulfate solution after ultrasonic vibration; add 2.5wt% polyethylene glycol and 0.6mol / L ammonia solution to the aluminum sulfate solution, mix thoroughly and Stir evenly to obtain a solution; transfer the solution to a reaction kettle, and place the reaction kettle in an electric blast drying oven to heat at 140°C and keep it warm for 14 hours; take out the reaction kettle and cool it to room temperature naturally, and deionize the precipitate in the reaction kettle Wash with water and absolute ethanol, dry in a vacuum oven at 80°C for 18 minutes to constant weight, grind thoroughly and dry again to obtain alumina particles.

[0051] Step 2. Dissolve aluminum chloride hydrate in the mixed solution of absolute ethanol and DMF to obtain a mixed solution with a concentration of aluminum chloride of 0.72mol / L, and the volume ratio of absolute ethanol and DMF is 1:1.2; add 12wt% PV...

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Abstract

The invention discloses a high-strength wear-resistant copper-alumina composite material and a preparation method thereof. Aluminum sulfate hydrate is used as a raw material and polyethylene glycol is used as a surfactant to obtain alumina particles; alumina fibers are prepared by electrospinning technology. Then mechanical powder mixing is carried out to obtain copper-alumina composite powder, and copper-alumina composite material is obtained after high-temperature sintering by discharge plasma. The copper-alumina composite material comprises 3-5% of graphite, 2.8-3.2% of alumina particles, 0.8-1.2% of alumina fibers, 0.2-0.3% of lanthanum powder, and the balance is Cu and unavoidable impurities. The performance of fiber and particle synergistically reinforced copper-alumina composite material is better. While retaining the plasticity of the matrix, the strength of the composite material is improved, and the fiber acts as a skeleton support in the matrix. The particles can effectively strengthen the matrix and realize the reinforcement. Complementary advantages and coupling effects among them, so as to improve the hardness and wear resistance of composite materials.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, relates to a wear-resistant copper-alumina composite material, and also relates to a preparation method of the above-mentioned copper-alumina composite material. Background technique [0002] Copper has excellent electrical and thermal conductivity, and is widely used in aviation, aerospace, electronics, electricity, information, energy, machinery, metallurgy, construction, and transportation. However, with the continuous progress and development of science and technology and the electronics industry , not only require it to have good strength and electrical and thermal conductivity, but also need to have high wear resistance and low thermal expansion coefficient, so it is imperative to design and develop materials with better performance. [0003] In order to improve the related properties of copper, there are two main solutions at present. The first is the alloying method of copper. By ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05B22F3/105
CPCC22C9/00C22C32/0084C22C32/001C22C1/05B22F3/105B22F2003/1051
Inventor 付翀王金龙闫贞梁苗苗李清馨惠世昌张英豪叶伟
Owner XI'AN POLYTECHNIC UNIVERSITY
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