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Metal-based composite material and preparation method thereof

A technology of metal composite materials and composite materials, applied in the field of metal matrix composite materials and their preparation, can solve the problems of reduced plasticity and toughness, mismatch of strong plasticity of new copper-based composite materials, hindering development and application, etc.

Pending Publication Date: 2021-12-03
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that the strength of copper-based composites added with reinforcing phases is increased, but the plasticity and toughness are reduced to varying degrees. Therefore, the problem of strong-plastic mismatch in the developed new copper-based composites hinders its further development and application.

Method used

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  • Metal-based composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the metal matrix composite material of this embodiment includes the following steps:

[0029] 1) mixed powder

[0030] The CuCr alloy powder with a particle size of 50-90 μm (the CuCr alloy powder is composed of the following mass percentage components: Cr0.5%, the balance is Cu) and the linear conductive enhancement phase are placed in a mass ratio of 90:10. Mix in a powder mixer for 3 hours and mix evenly to obtain a mixture; the linear conductive enhancement phase used is TiB whisker, with a length of 5-30 μm and a diameter of 0.5-2 μm;

[0031] 2) Blank making

[0032] The mixture obtained in step 1) is placed in a mold for cold isostatic pressing under vacuum conditions to obtain a copper-based metal composite body (i.e., a solid metal composite material); the pressure of cold isostatic pressing is 200 MPa, and the time is 60 minutes;

[0033] 3) arc melting

[0034] The copper-based metal material green body prepared in step 2) is put ...

Embodiment 2

[0039] The preparation method of the metal matrix composite material of this embodiment includes the following steps:

[0040] 1) mixed powder

[0041] The copper alloy powder and the linear conductive reinforcement phase are put into the powder mixer according to the mass ratio of 99.99:0.01 and mixed evenly for 12 hours to obtain the mixture; the copper alloy powder used is CuZr alloy powder (CuZr alloy powder is made of The composition of the following mass percentages: Zr 0.1%, the balance is Cu), the linear conductive enhancement phase is multi-walled carbon nanotubes, the outer diameter is 10-30nm and the length is 0.5-2 μm;

[0042] 2) Blank making

[0043] The mixture obtained in step 1) is placed in a mold and hot-pressed under vacuum conditions to obtain a copper-based metal composite body (i.e., a solid metal composite material); the temperature of hot-pressing is 600° C., the pressure is 300 MPa, and the time is 50 minutes;

[0044] 3) arc melting

[0045] putti...

Embodiment 3

[0048] The preparation method of the metal matrix composite material of this embodiment includes the following steps:

[0049] 1) mixed powder

[0050] Cu powder, Cr powder and Zr powder with a particle size of 50-100 μm are prepared in proportion to mixed metal powder (mixed metal powder is composed of the following components in mass percentage: Cr 0.5%, Zr 0.1%, and the balance is Cu) and The linear conductive reinforcing phase is put into the powder mixer according to the mass ratio of 70:30 and mixed for 8 hours, and then mixed evenly to obtain the mixture;

[0051] The linear conductive enhancement phase is TiB whisker with a length of 20-30 μm and a diameter of 1-5 μm;

[0052] 2) Blank making

[0053] The mixture obtained in step 1) is placed in a mold and hot-pressed under vacuum conditions to obtain a copper-based metal composite body (that is, a solid metal composite material); the hot-pressing temperature is 960 ° C, the pressure is 60 MPa, and the time is 10 minut...

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Abstract

The invention relates to a metal-based composite material and a preparation method thereof, and belongs to the field of metal-based composite materials. The preparation method of the metal-based composite material comprises the following steps that in the solid melting process of the metal composite material, generated melt is synchronously subjected to deposition molding; a magnetic field in a certain direction is applied to the melt in the deposition forming process; and the metal composite material solid comprises a metal matrix and a linear conductive reinforcing phase dispersed in the metal matrix. According to the preparation method of the invention, a magnetic field in a certain direction is applied in the deposition forming process, so that linear conductive reinforcement phases are directionally arranged in the process that molten liquid enters a molten pool and after the molten liquid enters the molten pool, then the linear conductive reinforcement phases are solidified to form a deposition layer with a linear conductive deposition phase, and the metal-based composite material is finally formed along with continuous accumulation of the deposition layer. According to the method of the invention, the toughness and the strength of the metal-based composite material can be improved, and the heat conduction performance and the electric conduction performance of the metal-based composite material can be greatly improved in the directional arrangement direction of the reinforcement phases.

Description

technical field [0001] The invention relates to a metal matrix composite material and a preparation method thereof, belonging to the field of metal matrix composite materials. Background technique [0002] High-performance copper alloys with high strength, toughness, and high electrical / thermal conductivity are widely used in aerospace, military defense, integrated circuits, transportation and other fields due to their excellent mechanical properties and functional properties. They are the key to equipment manufacturing for national economy and major national strategic needs Material. However, with the competition of high-end equipment manufacturing industries such as aerospace and the rapid development of national key fields such as rail transportation, electric energy, and electronic information, the service environment has become increasingly harsh, and higher requirements have been placed on copper alloys. For this reason, many scholars have prepared copper-based compos...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C9/00B22F3/04B22F3/14C22C47/08B22D27/02H01B1/02C22C49/02C22C49/14C22C101/22C22C101/10
CPCC22C1/1036C22C9/00C22C26/00B22F3/04B22F3/14C22C47/08B22D27/02C22C49/02C22C49/14H01B1/026H01B1/02C22C2026/002C22C1/1047
Inventor 宋克兴王要利张彦敏国秀花周延军李韶林李海涛杨冉冯江彭晓文朱一明吴捍疆
Owner HENAN UNIV OF SCI & TECH
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