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A kind of preparation method of SIC particle reinforced Cu-based gradient composite material

A composite material and particle reinforcement technology, applied in the field of composite materials, can solve the problems of thin gradient composite materials, low production efficiency, wear resistance limitation, etc., to achieve the effect of ensuring thermal stress relaxation function and improving service life

Inactive Publication Date: 2011-12-07
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the gradient composite material prepared by this method is thin, the production efficiency is low, and the wear resistance is limited

Method used

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  • A kind of preparation method of SIC particle reinforced Cu-based gradient composite material
  • A kind of preparation method of SIC particle reinforced Cu-based gradient composite material
  • A kind of preparation method of SIC particle reinforced Cu-based gradient composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, SiC particle reinforced Cu-based gradient composite material preparation method:

[0029] The matrix material of the gradient composite material is ordinary electrolytic copper powder, the purity is greater than 99.8%, and the average particle size is 200 mesh; the reinforcement material of the gradient composite material is SiC particles, and the average particle size is 20 μm. The composition distribution function in the form of power function is selected, and the step distribution is used to approximate the linear analysis method. This distribution form has strong adaptability and is convenient for mathematical processing and application. Six kinds of homogeneous copper-based composite powders with different SiC particle contents were prepared first, and then gradient composites were prepared by two-way pressing with a floating die. The volume fraction of SiC particles in each layer of the gradient composite material is from the 25% SiC+75% Cu composite...

Embodiment 2

[0034] Example 2, SiC particle reinforced Cu-based gradient composite material performance

[0035] 1. Conductivity of Cu-based gradient composites reinforced by SiC particles

[0036] The electrical conductivity of composite materials is greatly affected by the density of the material. The 7501 eddy current conductivity meter was used to test the conductivity of the composite material after one-time sintering and re-pressure sintering, and compared with the theoretically calculated conductivity. The test results are as follows: figure 2 shown. Among them, 2-1 is the conductivity curve of SiC content and composite material, and 2-2 is the conductivity curve of distance from 100% Cu in the gradient layer and the conductivity curve of composite material. All values ​​in the figure are according to the international annealed copper standard LACS (International Annealed Copper Standard) said. analyze diagram 2-1 It can be seen from the curve that the electrical conductivity ...

Embodiment 3

[0049] Example 3, SiC particle reinforced Cu-based gradient composite material application field

[0050] SiC particle reinforced Cu-based gradient composite material has good electrical conductivity, excellent heat resistance and oxidation resistance, and excellent wear resistance. There are broad prospects for development in terms of pantograph slides and materials for electric brushes.

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Abstract

The invention discloses a preparation method of a SiC particle reinforced Cu-based gradient composite material, which comprises the following steps: weighing powder mixing → ball mill mixing powder for 4 hours → 400MPa billet making → vacuum degree of 10-2Pa, sintering temperature of 950°C, heating rate 10°C / min, holding time 2.5 hours for one sintering → cooling in the furnace after completion → secondary pressing at a pressure of 400MPa → vacuum degree of 10-2Pa, sintering temperature of 950°C, heating rate of 10°C / min, heat preservation The time is 2.5 hours for secondary sintering → cooling with furnace after completion → sample. It makes up for the shortcomings of uniform performance of traditional homogeneous composite materials with a certain content of reinforcing particles, thereby improving the service life of gradient composite material parts.

Description

technical field [0001] The invention relates to the preparation of a SiC particle-reinforced Cu-based gradient composite material, which belongs to the technical field of composite materials. Background technique [0002] The existing preparation methods of gradient composite materials are mainly as follows: [0003] One is physical vapor deposition (PVD) and chemical vapor deposition (CVD). The PVD method is to heat the metal at a high temperature to evaporate it, introduce oxygen, nitrogen and carbide gases to produce a chemical reaction, and deposit the synthesized nitrides and carbides on the base material to form a dense gradient composite film about 100um thick. The CVD method is to heat and decompose metal and metal-like halide gases to deposit them on the surface of the substrate, or send the generated mixed gases such as carbides and nitrides into the reaction tube, and the compounds generated after heating and reaction are deposited on the substrate. Method for p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16
Inventor 解念锁王瑾
Owner SHAANXI UNIV OF TECH
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