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High-strength high-tenacity graphene-enhanced copper-based composite material and biomimetic preparation method for nacreous layer thereof

A copper-based composite material, high-strength and high-toughness technology, applied in the field of metal matrix composite materials, can solve the problem of lack of new cross-scale bionic ideas and new methods

Active Publication Date: 2019-06-07
江西博沃新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, most nacre biomimetic metal matrix composites have taken the traditional "brick-mud" structure as the design target, lacking new cross-scale bionic ideas and new methods. If the multi-scale hierarchical nested structure of nacre can be successfully biomimetic, The strength and plastic / toughness matching of composite materials will be greatly improved

Method used

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  • High-strength high-tenacity graphene-enhanced copper-based composite material and biomimetic preparation method for nacreous layer thereof
  • High-strength high-tenacity graphene-enhanced copper-based composite material and biomimetic preparation method for nacreous layer thereof

Examples

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Embodiment 1

[0037] In order to improve the strength and toughness matching of copper-based composite materials, and take into account electrical conductivity and wear resistance, the invention provides a graphene-reinforced copper-based composite material with a nacre "brick-mud-bridge" structure bionic and its preparation method , its composition is characterized in that it contains the following components:

[0038] Cr: 0.3w.t.%;

[0039] Fe: 0.05w.t.%;

[0040] Mg: 0.05w.t.%;

[0041] Graphene 1vol%;

[0042] The balance is Cu, and the total impurity content is less than 0.2%.

[0043] In this embodiment, a nacre "brick-mud-bridge" structure bionic graphene-reinforced copper-based composite material and a nacre bionic preparation method thereof, the preparation includes the following steps:

[0044] (1) Spray powder making: first add Fe to the copper melt, then add pure Mg, and finally add pure Cr, and the metal melt mixed with copper, Fe, Mg and Cr is made into powder by gas atomi...

Embodiment 2

[0054] The difference from Example 1 is that in this example, a high-strength and high-toughness graphene-reinforced copper-based composite material and a nacre bionic preparation method thereof include the following components and proportions:

[0055] Cr: 0.6w.t.%;

[0056] Fe: 0.085w.t.%;

[0057] Mg: 0.085w.t.%;

[0058] Graphene 2.5vol%;

[0059] The balance is Cu;

[0060] In this embodiment, the total content of the Fe and Mg elements is less than 0.12%, and the atomic ratio of the two is 2:1;

[0061] In this embodiment, the total impurity content is less than 0.1%.

[0062] In the present embodiment, the total content of Fe and Mg elements added in step (1) is lower than 0.12%, and the atomic ratio of the two is 2:1, and the total content of impurities is less than 0.1%, so as to be similar to that of Example 1. Ratio, if the total content of Fe and Mg elements is higher than 0.12%, the electrical conductivity of the material will be lower than 75% IACS; both Fe ...

Embodiment 3

[0065] Embodiment 3 differs from Embodiment 1 and Embodiment 2 in that:

[0066] A high-strength and high-toughness graphene-reinforced copper-based composite material and a nacre bionic preparation method thereof, comprising the following components and proportions:

[0067] Cr: 0.5w.t.%;

[0068] Fe: 0.07w.t.%;

[0069] Mg: 0.07w.t.%;

[0070] Graphene 2.5vol%;

[0071] The balance is Cu;

[0072] In this embodiment, the total content of the Fe and Mg elements is less than 0.12%, and the atomic ratio of the two is 2:1;

[0073] In this embodiment, the total content of impurities is less than 0.2%;

[0074] In this embodiment, the sintering temperature in step (7) is 700°C;

[0075]In this embodiment, the total content of Fe and Mg elements added in step (1) is lower than 0.12%, and the atomic ratio of the two is 2:1, and the total content of impurities is less than 0.2%, so that the Cu-Cr During the production process of the alloy powder, the quality of the Cu-Cr allo...

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Abstract

The invention discloses a high-strength high-tenacity graphene-enhanced copper-based composite material and a biomimetic preparation method for a nacreous layer thereof. The biomimetic preparation method for the nacreous layer comprises the steps that firstly, solute atom super-saturated copper-chromium alloy powder is prepared through atomizing powdering; then nanometer chromium phase is precipitated through aging treatment; then ball milling is conducted and sheet-shaped powder is acquired; then an electrochemical de-alloying method is utilized, the copper element in the sheet-shaped powderis dissolved selectively, and chromium-phase protrusions are constructed in the surface of the powder; then through a slurry method, polyvinyl alcohol (PVA) is adsorbed to the surface of the sheet-shaped powder, and PVA-modified copper-chromium sheet-shaped powder is formed; and orderly piling up of powder is formed through free falling in alcohol, then a block body material is prepared through spark plasma sintering (SPS) and densification, a thermo-mechanical treatment manner is adopted so that nanophase chromium in the surface of the sheet-shaped powder is in contact mutually and diffused and bridged into a nacreous layer mineral bridge biomimetic structure, and the graphene / copper-chromium based composite material is acquired. According to the biomimetic preparation method for the nacreous layer, through biomimetics of a "brick-mud-bridge" structure of the nacreous layer, the strength and tenacity of the copper-based composite material are improved, and in addition, good conductive property and tribological property are acquired.

Description

technical field [0001] The invention relates to the technical field of metal-based composite materials, in particular to a high-strength and high-toughness graphene-reinforced copper-based composite material and a nacre layer bionic preparation method thereof. Background technique [0002] Metal matrix composites (MMCs) are composite materials with metal or alloy as the matrix and fibers or particles as the reinforcement phase. They have both the excellent properties of metal and reinforcement phase, and have been commercialized in many industries. However, the future of MMCs may not only continue to expand the application field and market size, but also may stagnate or even shrink under the competition of other materials and technologies. The inverted relationship between its strength and plasticity / toughness is an important problem that needs to be solved urgently. Powder metallurgy is the most commonly used preparation method for MMCs. The sintering process cannot complet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/04C22C1/10C22F1/08C25F3/02B22F3/14B22F3/24
Inventor 张建波胡咏梅郑铮辉李律达郭圣达肖翔鹏李勇陈辉明谢伟滨陈俏满绪存
Owner 江西博沃新材料有限公司
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