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Multi-element ceramic reinforced Cu-based composite material

A technology of composite materials and ceramics, applied in the field of powder metallurgy materials, can solve problems such as low tensile strength, poor plasticity and toughness

Inactive Publication Date: 2019-06-04
沈阳东青科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ceramics have high compressive strength, but low tensile strength, poor plasticity and toughness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0015] The raw materials for the preparation of multi-component ceramic reinforced Cu-based composite materials include: Cu-based pre-alloyed powder, multi-component ceramic SiC, Si3N4, B4C powder, and bulk graphite. The preparation steps of the multi-element ceramic reinforced Cu-based composite material are as follows: the original powder is weighed and batched according to the experimental design plan, and then poured into a planetary ball mill for wet grinding. After the ball milling, the prepared granules were vacuum-dried for 60 minutes at a drying temperature of 50° C., followed by adding a forming agent for granulation. Put the prepared powder into a single-column hydraulic press for compression molding, and put it into a dewaxing-low-pressure sintering integrated furnace for sintering. The sintering temperature is 1230 ° C and the holding time is 90 minutes. The detection steps of multi-component ceramic reinforced Cu-based composite materials are as follows: the dens...

Embodiment example 2

[0017] The particle size of the metal Cu alloy matrix is ​​about 20-40 μm, the particle size of ceramics and graphite is about 30-60 μm, SiC, Si3N4, B4C multi-component ceramics, graphite and Cu alloy powder are interlaced. After hot pressing and sintering at 860°C, some Cu alloy matrix particles grew slightly, and some particles melted and bonded together to form a solid network matrix, and multi-element ceramic particles were embedded in the matrix to play a role of particle reinforcement. , which also makes the prepared multi-component ceramic / Cu-based composite material have good mechanical properties and wear resistance. Ceramics and graphite do not grow up under this sintering process, and maintain the original flake shape. On the whole, the multi-component ceramics and metal matrix are evenly distributed, and the powder mixing and sintering effects are good.

Embodiment example 3

[0019] With the increase of the mass fraction of multi-component ceramics, the relative density of multi-component ceramics / Cu-based composites gradually decreased. When the mass fraction of multi-component ceramics was 2.6%, the relative density reached 99.5%, and the porosity was 1.32%, which well controlled the pore size. The density of the prepared multi-component ceramic / Cu-based composite material is good. After the mass fraction of multi-component ceramic is higher than 16.0%, the relative density of the composite material decreases sharply. With the addition of multi-component ceramic, on the bonding interface with Cu alloy Some pores or even holes appeared, and the porosity of the composite material gradually increased with the increase of the mass fraction of the multi-element ceramics, and when the mass fraction of the multi-element ceramics was between 0-16.0%, the porosity basically showed a linear increase, and the mass fraction of the multi-element ceramics increa...

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Abstract

The invention discloses a multi-element ceramic reinforced Cu-based composite material so as to improve hardness and wear resistance of a powder alloy. The multi-element ceramic reinforced Cu-based composite material has the beneficial effects that Cu-based prealloy powder, multi-element ceramic SiC, Si3N4 and B4C powder and blocky graphite are adopted as raw materials, and in the case of the prepared multi-element ceramic reinforced Cu-based composite material, hardness, compactness and bending strength are greatly improved; along with increasing of the mass fraction of SiC, Si3N4 and B4C multi-element ceramic, the relative density of the SiC, Si3N4 and B4C multi-element ceramic / Cu-based composite material is gradually reduced, the porosity is gradually increased, due to internal defects,such as crystal boundaries, lattice distortion and dislocation, of the composite material, lattice wave scattering is increased, the mean free path is reduced, and the thermal conductivity of the composite material is reduced; an annealing method, a secondary extrusion method and other methods are adopted for further treatment, so that the compactness of the material is improved, the defects suchas the dislocation and the porosity in a sintered body are reduced, and the thermal conduction performance is improved; and a novel production process can be provided for preparing the high-performance Cu-based composite material.

Description

Technical field [0001] The invention relates to a powder metallurgy material, in particular to a multi-element ceramic reinforced Cu-based composite material. Background technique [0002] Ceramic materials refer to a class of inorganic non-metallic materials made of natural or synthetic compounds through shaping and high-temperature sintering. It has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. It can be used as structural material, tool material, and because ceramics also have some special properties, they can also be used as functional materials. Ceramic materials are the materials with the best rigidity and the highest hardness among engineering materials, and their hardness is mostly above 1500HV. Ceramics have high compressive strength, but low tensile strength, poor plasticity and toughness. [0003] Copper-based composite material is an alloy composed of copper as the base and a certain amount of other element...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/05C22C9/00C22C32/00C22C1/08B22F3/11
Inventor 高明超
Owner 沈阳东青科技有限公司
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