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Preparation method of boron carbide-silicon carbide whisker toughened high-strength copper matrix composite

A technology for copper-based composite materials and silicon carbide whiskers is applied in the field of using nano-boron carbide-silicon carbide whiskers to toughen high-strength copper-based composite materials, and can solve the problem of inability to large-scale production, inability to realize industrialization, and copper alloys. High production costs and other problems, to achieve the effect of small size, high organizational stability, and improved strength

Active Publication Date: 2017-08-04
SHANDONG JIANZHU UNIV
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AI Technical Summary

Problems solved by technology

The grain refinement method can effectively improve the mechanical properties of copper alloys, but this process is not yet industrialized and cannot be mass-produced
Alloying can also improve the mechanical properties of copper alloys, but a large amount of precious metal elements are added, resulting in high production costs of copper alloys

Method used

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Embodiment Construction

[0022] The best embodiment of the present invention is given below: according to the chemical composition and weight percentage of the high-strength pure copper matrix material: Cu: 99.99%, the total amount of inclusion elements is not more than 0.01%. The high-strength pure copper powder prepared in proportion and absolute ethanol are mechanized ball milled in a ball mill for 24 hours to obtain an ultrafine powder with a grain size of 50-150 μm. The chemical composition of the boron carbide-silicon carbide whisker precursor material is: polytetrachloroethylene, B 2 o 3 , Si, C, Mn, NaCl, the weight ratio is: (45.4~48.2): (45.4~48.2): (45.6~50.8): (45.6~50.8): (0.1~0.9): (1.0~8.1) . The precursor composite powder capable of generating boron carbide-silicon carbide whiskers prepared in proportion plus absolute ethanol is mechanized ball milled in a ball mill for 24 hours to obtain an ultrafine precursor composite powder with a grain size of 200-800nm. Boron carbide-silicon c...

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Abstract

The invention belongs to the field of nonferrous metal composites, in particular to a method for toughening a high-strength copper-based composite by nanometer boron carbide and silicon carbide crystal whiskers. An in-situ generated high-strength copper-based composite powder toughened by boron carbide and silicon carbide crystal whiskers consists of high-strength copper-based composite base material powder and nanometer boron carbide and silicon carbide crystal whisker powder. The high-strength copper-based composite base powder is uniformly mixed with the nanometer boron carbide and silicon carbide crystal whisker powder by a mechanical mixing process, a vacuum-sintered hot-pressed ingot is enabled to deform through extrusion, and the in-situ generated high-strength copper-based composite toughened by the nanometer boron carbide and silicon carbide crystal whiskers is obtained. As the in-situ generated copper-based composite toughened by the nanometer boron carbide and silicon carbide crystal whiskers has high tenacity, and at the same time, the wear resistance and the strength are greatly improved, the copper-based composite is particularly suitable for high-speed railway high-strength cables, high-end equipment manufacturing industry and the like and is particularly suitable for being used as a material for cutters, dies, aviation, aerospace and the like.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal composite materials, in particular to a method for toughening high-strength copper-based composite materials by using nanometer boron carbide-silicon carbide whiskers. Background technique [0002] Copper and copper alloy materials are currently widely used in industrial sectors such as power cables, electricians, motors, and high-end equipment manufacturing due to their good electrical conductivity, thermal conductivity, corrosion resistance, good plastic processing performance, and high strength. Because the strength and hardness of copper and copper alloy materials are much different from those of steel materials, and their content in nature is less, therefore, with the advancement of technology and industry, higher requirements are put forward for the mechanical properties of copper and copper alloys. Therefore, it is necessary to develop copper alloys with high strength and excellent plastic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/14C22C49/02C22C49/14C22C101/12
CPCC22C47/14C22C49/02C22C49/14
Inventor 徐淑波廖雪闻萍李胜鹏
Owner SHANDONG JIANZHU UNIV
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