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Novel copper-based composite material and preparation method thereof

A copper-based composite material, a new type of technology, applied in the field of metal and its composite materials, to achieve the effect of simple process and short production cycle

Active Publication Date: 2022-01-11
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the patent knows that hBN can improve the tribological properties of copper materials, but in order to prevent the negative impact of hBN on the wear resistance of copper materials, only the method of controlling the content of hBN is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Select Cu powder (purity and particle size are 99.99% and 50nm respectively), B 4 C powder (purity and particle size are 99.96% and 20nm) and hBN powder (purity and particle size are 99.98% and 10nm) are used as raw materials, and the weight ratio is controlled at 70:20:10. After accurate weighing with a balance, it is loaded into ceramics Ball mill jar, evacuated to a final vacuum of 10 -2 Pa;

[0024] (2) Put the ball mill jar into the ball mill for ball milling, the ball milling time is 5h, take out the mixed powder and fill it into a heat-resistant steel mold;

[0025] (3) Put the mold into a vacuum hot-pressing sintering furnace for hot-pressing sintering. The sintering temperature is 1050°C, the heating rate is 75°C / min, the sintering pressure is 50MPa, the heat preservation and pressure holding time is 2h, and the vacuum degree is 10 -7 Pa, after the sintering is completed, the temperature of the furnace is lowered and cooled to obtain a new type of copper-...

Embodiment 2

[0027] The technical process is basically the same as in Example 1, but the process parameters are different.

[0028] (1) Cu powder particle size 500nm, B 4 The particle size of C powder is 70nm, the particle size of hBN powder is 80nm, and the weight ratio is controlled at 85:10:5;

[0029] (2) Ball milling time 2h;

[0030] (3) The hot pressing sintering temperature is 1035°C, the heating rate is 70°C / min, the sintering pressure is 45MPa, the heat preservation and pressure holding time is 1h, and the vacuum degree is 10 -5 Pa, the resulting new copper-based composite material has a density of 99.12%, a tensile strength of 358MPa, and a hardness of 75HBW.

Embodiment 3

[0032] The technical process is basically the same as in Example 1, but the process parameters are different.

[0033] (1) Cu powder particle size 300nm, B 4 The particle size of C powder is 500nm, the particle size of hBN powder is 500nm, and the weight ratio is controlled at 79:15:6;

[0034] (2) Ball milling time 4.5h;

[0035] (3) The hot pressing sintering temperature is 1040°C, the heating rate is 72°C / min, the sintering pressure is 47MPa, the heat preservation and pressure holding time is 1.8h, and the vacuum degree is 10 -6 Pa, the obtained copper-based composite material has a density of 99.53%, a tensile strength of 379MPa, and a hardness of 78HBW.

[0036] B used in the present invention 4 C has the characteristics of high strength, high hardness, corrosion resistance, and large neutron absorption cross section, while hBN is an excellent solid lubricant with corrosion resistance and neutron absorption properties. If B 4 Synergistically introducing C and hBN into...

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Abstract

The invention relates to a novel copper-based composite material and a preparation method thereof, and belongs to the field of metal and composite materials thereof. The novel copper-based composite material comprises the following components in percentage by mass: 10-20% of B4C, 5-10% of hBN and the balance of copper. The preparation method comprises the steps that firstly, three kinds of powder including Cu powder, B4C powder and hBN powder are weighed and subjected to ball milling for 2-5 h according to a preset proportion, then a heat-resistant steel mold is filled with the mixed powder, then the mold is placed in a vacuum hot-pressing sintering furnace for hot-pressing sintering forming, after sintering is completed, the temperature is lowered to the room temperature along with the furnace, and the novel copper-based composite material is obtained. The technological process is simple and controllable, and the prepared novel copper-based composite material is excellent in comprehensive performance, can be used for harsh working conditions of dry friction, abrasion, corrosion and nuclear radiation interaction, and has very wide application prospects and popularization value.

Description

technical field [0001] The invention belongs to the field of metals and composite materials thereof, and in particular relates to a novel copper-based composite material and a preparation method thereof. Background technique [0002] Metal copper (Cu) has outstanding characteristics such as high thermal conductivity and electrical conductivity, good ductility, and excellent formability, so it is widely used in cables and electrical, electronic components, military armor-piercing weapons, electromagnetic gun rails and other fields. With the rapid development of science and technology, the use of metal copper is becoming wider and wider, and the requirements for its use are getting higher and higher. However, copper as a single metal has low hardness and strength, which has been difficult to meet the needs of technological development. In this context, a variety of copper alloys or copper matrix composites have emerged. In actual working conditions, various factors interact,...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C32/00C22C1/05B22F3/14
CPCC22C9/00C22C32/0047C22C1/05B22F3/14
Inventor 李秀青魏世忠杨晴霞王琪娄文鹏张倩张敏杰周玉成徐流杰潘昆明张国赏江涛陈冲毛丰张程熊美任永鹏
Owner HENAN UNIV OF SCI & TECH
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