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High-strength and toughness medium-entropy CrCoNi particle reinforced Cu-based composite material and preparation method thereof

A composite material and particle-reinforced technology, applied in the field of new powder metallurgy materials, to achieve good sintering performance, strong coordinated deformation ability, and improved strength

Active Publication Date: 2021-09-17
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method, microstructure and mechanical properties of medium-entropy CrCoNi alloy reinforced Cu-based composite materials are still blank in the industry and academia.

Method used

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  • High-strength and toughness medium-entropy CrCoNi particle reinforced Cu-based composite material and preparation method thereof
  • High-strength and toughness medium-entropy CrCoNi particle reinforced Cu-based composite material and preparation method thereof
  • High-strength and toughness medium-entropy CrCoNi particle reinforced Cu-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The CrCoNi medium-entropy alloy reinforced Cu-based matrix composite material is prepared, and the raw materials used are 95vol.% spherical pure Cu powder and 5vol.% spherical pure CrCoNi powder. Weigh the raw material powder according to the powder raw material ratio, and through the protection of argon, the pure Cu powder is pre-ground into flake Cu powder with the ball milling parameters of 350 rpm, ball milling time 5h, and ball-to-material ratio of 15:1. The rotation speed per minute, the ball milling time of 4 hours, and the ball milling parameters of the ball-to-material ratio of 20:1 pre-grind the CrCoNi powder into flaky CrCoNi powder. On this basis, the flaky Cu powder and the flaky CrCoNi powder were ball milled and mixed in an alcohol medium. The mixing parameters were ball mill speed 300 rpm, ball to material ratio 5:1, ball milling time 5h, and then vacuum filtration at room temperature into a green body. Then the green body was sintered in a spark plasma...

Embodiment 2

[0034] The CrCoNi medium entropy alloy reinforced Cu-based composite material is prepared, and the raw materials used are 90vol.% spherical pure Cu powder and 10vol.% spherical pure CrCoNi powder. Weigh the raw material powder according to the powder raw material ratio, and through the protection of argon, the pure Cu powder is pre-ground into flake Cu powder with the ball milling parameters of 350 rpm, ball milling time 5h, and ball-to-material ratio of 15:1. Pre-grind CrCoNi powder balls into flaky CrCoNi powder at a speed of revolution per minute, ball milling time of 4 hours, and ball-to-material ratio of 20:1. On this basis, the flaky Cu powder and the flaky CrCoNi powder were ball milled and mixed in an alcohol medium. The mixing parameters were ball mill speed 300 rpm, ball-to-material ratio 3:1, ball milling time 5h, and then vacuum filtration at room temperature into a green body. The green body was then sintered in a spark plasma sintering furnace at 950° C. for 20 ...

Embodiment 3

[0036] The CrCoNi medium entropy alloy reinforced Cu-based matrix composite material is prepared, and the raw materials used are 90vol.% spherical pure Cu powder and 10vol.% spherical pure CrCoNi powder. Weigh the raw material powder according to the powder raw material ratio, and through the protection of argon, use the ball milling parameters of 350 rpm, ball milling time 8h, and ball-to-material ratio 10:1 to ball mill pure Cu powder into flake Cu powder, and use 500 rpm CrCoNi powder is ball-milled into flaky CrCoNi powder at the speed of rotation per minute, ball milling time of 4 hours, and ball-to-material ratio of 10:1. On this basis, the flaky Cu powder and the flaky CrCoNi powder were ball milled and mixed in an alcohol medium. The mixing parameters were ball mill speed 350 rpm, ball to material ratio 4:1, ball milling time 4h, and then vacuum filtration at room temperature into a green body. Then the green body was sintered in a spark plasma sintering furnace at 10...

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Abstract

The invention belongs to the technical field of novel powder metallurgy materials, and particularly discloses a high-strength and toughness medium-entropy CrCoNi particle reinforced Cu-based composite material and a preparation method thereof. The preparation method comprises the following steps that after being subjected to ball milling into sheets, spherical Cu powder and CrCoNi powder are mixed through a wet grinding process, and then a composite powder green body is obtained in a vacuum suction filtration manner; sintering molding is carried out on the composite powder green body by adopting a spark plasma sintering process; and the sintered composite material is subjected to post-plastic deformation by adopting a hot rolling process, and therefore the high-density medium-entropy CrCoNi alloy reinforced Cu-based layered composite material is prepared. Based on the intrinsic performance of a CrCoNi medium-entropy alloy and the synergistic effect of the layered structure, the obtained composite material not only has plasticity and toughness equivalent to those of pure Cu, but also has remarkably-improved strength, and shows an excellent strength and plasticity matching degree.

Description

technical field [0001] The invention belongs to the technical field of new powder metallurgy materials, in particular to a high-strength and toughness medium-entropy CrCoNi particle-reinforced Cu-based composite material and a preparation method thereof. Background technique [0002] Cu has excellent thermal conductivity and electrical conductivity, and is widely used in fields such as electric power, electricity, and weapons. However, the low strength of pure Cu limits the direct application of pure Cu in industrial fields. In order to obtain mechanical properties that can meet the application requirements, adding particle reinforcements to the Cu matrix is ​​a widely used approach. So far, a variety of ceramic particles have been used as reinforcing phases, such as Al 2 o 3 , SiC, TiB 2 Wait. The strength and Young's modulus of the prepared Cu-based composites can be significantly higher than pure Cu by adding ceramic particles into the Cu matrix, but the ductility an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C9/00B22F9/04B22F1/00B22F3/105B22F3/18
CPCC22C1/0425C22C9/00B22F9/04B22F3/105B22F3/18B22F2009/043B22F2009/042B22F2003/185B22F2998/10
Inventor 郭柏松李卫
Owner JINAN UNIVERSITY
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