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Multiple dispersion strengthening copper-base composite material prepared in situ and preparation method thereof

A technology of dispersion-strengthening copper and in-situ generation, which is applied in the field of metal matrix composite materials and its preparation, can solve the problems of single type of disperse phase and coarse particles, and achieve excellent mechanical properties and conductivity, fine structure and stable production process. Effect

Inactive Publication Date: 2009-12-30
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the deficiencies and defects of the above-mentioned prior art, the present invention provides an in-situ multi-component dispersion-strengthened copper-based composite material and its preparation method, which mainly adopts the method of high-energy ball milling. During the high-energy impact process, various elements are produced The unbalanced reaction generates fine multi-component reinforced phases in situ, which solves the problem of single types of dispersed phases and coarse particles. The product has good mechanical properties and electrical conductivity, and the preparation process is simple, easy to operate, and low in cost.

Method used

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  • Multiple dispersion strengthening copper-base composite material prepared in situ and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] To prepare Cu-0.3TiC-0.3TiB 2 -0.3ZrC multi-component copper matrix composite material as an example

[0041] 1. First, 99.2wt% Cu powder, 0.2wt% Ti powder, 0.2wt% Zr, 0.1wt% B and 0.3wt% C were mixed and ball milled for 50 hours, the ball-to-material ratio was 30:1, and the milling speed was 500 rpm. The ball milling atmosphere is argon;

[0042] 2. Then the ball-milled powder is annealed in hydrogen at 400°C for 3 hours;

[0043] 3. Then press the annealed powder into a green body under an isostatic pressure of 200 MPa;

[0044] 4. Sinter the compact at 900°C for 5 hours in a hydrogen atmosphere;

[0045] 5. Then hot-press the sintered body, the hot-pressing temperature is 800°C, the hot-pressing pressure is 400MPa, and the pressure is maintained for 10 minutes;

[0046] 6. Then refire the green body after hot pressing according to the original sintering process; the process parameters are the same as step 5;

[0047] 7. Then hot-extrude the reburned body into wire...

Embodiment 2

[0050] To prepare Cu-1Al 2 o 3 -0.5ZrC-0.3ZrO 2 Multi-component copper matrix composite material as an example

[0051] 1. First, 96.4wt% Cu powder, 0.8wt% Al powder, 0.1wt% Zr, 0.5wt% C, 1.3wt% Cu 2 O mixing ball milling for 100 hours, the ball-to-material ratio is 50:1, the ball milling speed is 600 rpm, and the ball milling atmosphere is argon;

[0052] 2. Then the ball-milled powder is annealed in hydrogen at 400°C for 3 hours;

[0053] 3. Then press the annealed powder into a green body under an isostatic pressure of 400MPa;

[0054] 4. Sinter the compact at 900°C for 5 hours in a hydrogen atmosphere;

[0055] 5. Then hot-press the sintered body, the hot-pressing temperature is 850°C, the hot-pressing pressure is 300MPa, and the pressure is maintained for 10 minutes;

[0056] 6. Then refire the green body after hot pressing according to the original sintering process; the process parameters are the same as step 5;

[0057] 7. Then hot-extrude the reburned green bod...

Embodiment 3

[0060] Taking the preparation of Cu-3TiC-1TiB-0.3ZrC multi-component copper matrix composite as an example

[0061] 1. First mix 95wt% Cu powder, 2.0wt% Ti powder, 1.5wt% Zr, 0.5wt% B and 1.0wt% C and ball mill for 75 hours, the ball-to-material ratio is 80:1, the ball milling speed is 400 rpm, and the ball milling The atmosphere is argon;

[0062] 2. Then the ball-milled powder is annealed in hydrogen at 400°C for 3 hours;

[0063] 3. Then press the annealed powder into a green body under an isostatic pressure of 400 MPa;

[0064] 4. Sinter the compact at 900°C for 8 hours in a hydrogen atmosphere;

[0065] 5. Then hot-press the sintered body, the hot-pressing temperature is 850°C, the hot-pressing pressure is 600MPa, and the pressure is maintained for 10 minutes;

[0066] 6. Then refire the green body after hot pressing according to the original sintering process; the process parameters are the same as step 5;

[0067] 7. Then hot-extrude the reburned body into rods or p...

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Abstract

The invention discloses a multiple dispersion strengthening copper-base composite material produced in situ and a preparation method thereof; the reinforced phase comprises at least three of the following substances: titanium carbide, zirconium carbide, alumina, titanium boride, aluminum carbide, chromium oxide, zirconia, graphite and copper; wherein, the contents of titanium carbide, zirconium carbide, alumina, titanium boride, chromium oxide and zirconia are not less than 0.3% and not more than 5%, the content of aluminum carbide is not less than 0.1% and not more than 5%, the content of graphite is not less than 0.1% and not more than 1% and the balance is copper. The particle size of the reinforced phase is between 10nm to 10mu m. The preparation method adopts ball milling; pressing, sintering and squeezing processes and the technological parameters are optimized and controlled properly to obtain the multiple dispersion strengthening copper-base composite material. Because the in situ self-generation technology is adopted and various reinforced phase methods are combined, the material of the invention has higher high-temperature strength and better electroconductibility and anti-creep property compared with the traditional ceramic particle strengthening copper-base composite material.

Description

technical field [0001] The invention relates to a metal-based composite material and a preparation method thereof, in particular to an in-situ multi-component dispersion-strengthened copper-based composite material and a preparation method thereof. Background technique [0002] Due to its extremely high electrical and thermal conductivity, good processing performance and low price, copper is widely used in fields including navigation, aviation, electronics, etc., such as electrical contacts, brushes, active cooling components, electronic components, electrodes , Low-speed heavy-duty friction material. However, due to the low strength and hardness of pure copper metal, its wide application is limited. Ceramic particle reinforced copper matrix composites, such as Cu-Al 2 o 3 , Cu-TiB 2 Composite materials such as composite materials can greatly improve the hardness and strength of the copper matrix while taking into account the excellent thermal and electrical conductivity...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C32/00C22C1/05
Inventor 甘可可祁更新陈晓陈乐生
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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