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Preparation method for oxide dispersion strengthened copper-based composite material

A technology of dispersion strengthening copper and dispersion strengthening, which is applied in the field of composite materials, can solve the problems of poor mechanical properties of composite materials, influence, and insufficient particle size of strengthening phase.

Pending Publication Date: 2021-07-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long production cycle and high cost of the internal oxygen process, it is difficult to control the particle size of alumina particles, and it is difficult to control the amount of oxygen and oxidation time. At the same time, the requirements for production equipment and process control are very strict in the production process.
Another difficulty is that due to the poor wettability of the reinforcement particles and the copper matrix, there is segregation and aggregation in the copper matrix. The segregated reinforcement exists in the copper matrix composite material and is difficult to eliminate, which is easy to cause cracks and voids. adverse effects on mechanical properties
The performance of the mechanical alloying method is affected by the shortcomings of the strengthening phase, such as insufficient particle size, wide particle size distribution, easy mixing of impurities, and difficulty in mixing uniformly.

Method used

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  • Preparation method for oxide dispersion strengthened copper-based composite material

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Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of the oxide dispersion strengthened copper-based composite material of the present invention, comprising the following steps:

[0031] (1) Preparation of precursor colloidal solution

[0032] Add aluminum nitrate and copper acetate to deionized water at a ratio of 0.1wt%: 99.9wt.%, add potassium hydroxide to adjust the pH to 11, and stir at a high speed to form a precursor colloidal solution, wherein the high-speed stirring speed is 2000r / min , the stirring time is 10min, and the stirring temperature is 60°C;

[0033] (2) Preparation of composite oxide powder by spray drying

[0034] The prepared precursor colloidal solution is prepared into a composite oxide powder through a spray dryer (speed 10000r / min, spray drying temperature 200°C);

[0035] (3) Preparation of dispersion strengthened copper matrix composite powder

[0036] The composite oxide powder prepared in step (2) was calcined in a vacuum state, the calcination temperature was 500°C,...

Embodiment 2

[0040] A preparation method of the oxide dispersion strengthened copper-based composite material of the present invention, comprising the following steps:

[0041] (1) Preparation of precursor colloidal solution

[0042] Add aluminum nitrate and zirconium chloride (mass ratio 1:1) to deionized water at a concentration of 1wt% and copper sulfate at a concentration of 99wt.%, add potassium hydroxide to adjust the pH to 12, and stir at high speed to form a precursor colloidal solution , wherein the high-speed stirring speed is 6000r / min, the stirring time is 60min, and the stirring temperature is 60°C;

[0043] (2) Preparation of composite oxide powder by spray drying

[0044] The prepared precursor colloidal solution is prepared into a composite oxide powder through a spray dryer (speed 20000r / min, spray drying temperature 300°C);

[0045] (3) Preparation of dispersion strengthened copper matrix composite powder

[0046] The composite oxide powder prepared in step (2) is calc...

Embodiment 3

[0050] A preparation method of the oxide dispersion strengthened copper-based composite material of the present invention, comprising the following steps:

[0051] (1) Preparation of precursor colloidal solution

[0052] Aluminum nitrate, yttrium chloride and zirconium chloride (mass ratio 1:1:1) were added to deionized water at a concentration of 1.5wt% and copper acetate at a concentration of 98.5wt%, and potassium hydroxide was added to adjust the pH to 13 , and high-speed stirring to form a precursor colloidal solution, wherein the high-speed stirring speed is 3000r / min, the stirring time is 40min, and the stirring temperature is 60°C;

[0053] (2) Preparation of composite oxide powder by spray drying

[0054] The prepared precursor colloidal solution is prepared into a composite oxide powder through a spray dryer (speed 30000r / min, spray drying temperature 350°C);

[0055] (3) Preparation of dispersion strengthened copper matrix composite powder

[0056]The composite o...

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Abstract

The invention discloses a preparation method for an oxide dispersion strengthened copper-based composite material. The preparation method comprises the following steps of (1) adding soluble salt and copper salt corresponding to dispersion strengthened oxide into deionized water to prepare a uniformly mixed salt solution, and adjusting the pH value to prepare a precursor colloidal solution; (2) carrying out spray drying on the precursor colloidal solution to prepare composite oxide powder; and (3) carrying out vacuum calcination and reduction treatment on the composite oxide powder to obtain the dispersion strengthened copper-based composite powder. According to the preparation method, in the process, the content and the variety of reinforcements are regulated and controlled by using spray drying, so that the final mechanical property of the composite material is favorably regulated and controlled; and by adopting spray drying and hot isostatic pressing sintering processes, the compactness and air tightness of the composite material can be improved, and the application field of the dispersion strengthened copper-based composite material is further widened.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a preparation method of an oxide dispersion strengthened copper-based composite material. Background technique [0002] Dispersion-strengthened copper is an excellent high-strength and high-conductivity material, and it is one of the most promising composite materials among high-strength and high-conductivity composite materials. Due to the dispersion strengthening effect of the nano-scale particle reinforcement on the copper matrix, it has the characteristics of high strength, high hardness, high conductivity and high softening temperature. At present, dispersion-strengthened copper has been widely used in the fields of electrical switches, contact materials, resistance welding electrodes, large-scale integrated circuit lead frames, filament leads, high-power microwave tube structural materials and rotor materials. [0003] At present, the most common commercial d...

Claims

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Application Information

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IPC IPC(8): B22F9/22B22F3/15B22F3/20C22C1/05C22C9/00C22C32/00
CPCB22F9/22B22F3/15B22F3/20C22C1/05C22C9/00C22C32/001B22F2003/208
Inventor 甘雪萍赵琪周科朝吴浩李钰楷刘松旭
Owner CENT SOUTH UNIV