A kind of aluminum oxide reinforced copper matrix composite material and preparation method thereof

A technology of copper-based composite materials and alumina, applied in the field of alumina-reinforced copper-based composite materials and its preparation, and copper-based composite materials, can solve the problems of inability to fully exert the reinforcing effect of ceramic alumina, poor infiltration, and poor dispersion. It achieves the effects of excellent enhancement and promotion, good dispersion uniformity and strength improvement

Active Publication Date: 2020-09-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiency in the prior art that ceramic alumina has poor infiltration and dispersibility for copper-based composite materials, which leads to the inability to fully exert the reinforcing effect of ceramic alumina on the copper-based composite material matrix, and provides a Alumina Reinforced Copper Matrix Composite

Method used

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  • A kind of aluminum oxide reinforced copper matrix composite material and preparation method thereof
  • A kind of aluminum oxide reinforced copper matrix composite material and preparation method thereof
  • A kind of aluminum oxide reinforced copper matrix composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Al 2 o 3 particle surface modification

[0071] Will Al 2 o 3 Particles were added to 2g / L sodium lauryl sulfate aqueous solution, ultrasonically dispersed for 30min, in which Al 2 o 3 The ratio of the weight of the particles to the volume of the sodium lauryl sulfate aqueous solution is 0.1g:40ml; after standing for 24 hours, filter, take the filter residue and dry it in vacuum at 80°C for 24 hours to obtain the surface-modified Al 2 o 3 particles.

[0072] By comparing the surface modified Al 2 o 3 Particles with Al without surface modification 2 o 3 Morphological characteristics of the particles, it was found that the surface-modified Al 2 o 3 The surface of the particles is smooth, the impurity content is less, and the dispersion is better.

[0073] Al mentioned in the following examples 2 o 3 The particles refer to the Al particles obtained after surface modification by the above method. 2 o 3 particles.

Embodiment 2

[0075] al 2 o 3 Whisker Surface Modification

[0076] Will Al 2 o 3 Whiskers were added to 2g / L sodium lauryl sulfate aqueous solution, ultrasonically dispersed for 30min, in which Al 2 o 3 The ratio of the weight of the whiskers to the volume of the sodium lauryl sulfate aqueous solution is 0.1g:40ml; after standing for 24 hours, filter, take the filter residue and dry it in vacuum at 80°C for 24 hours to obtain the surface-modified Al 2 o 3 whiskers.

[0077] By comparing the surface modified Al 2 o 3 Whiskers and Al without surface modification 2 o 3 Morphological characteristics of whiskers, found Al without surface modification 2 o 3 Whiskers are mainly in the form of flocculation, uneven dispersion, and more impurities attached to the surface; the surface-modified Al 2 o 3 Whiskers have smooth surface, less impurity content and better dispersion.

[0078] Al mentioned in the following examples 2 o 3 Whiskers refer to the Al alloys obtained after surfa...

Embodiment 3

[0080] Copper Matrix Composite

[0081] (1) get the Al of surface modification treatment in embodiment 1 2 o 3 Particles; (2) in parts by weight, 3.5 parts of surface-modified Al 2 o 3 Particles, 6.5 parts of graphite powder, 1.5 parts of Ti 3 SiC 2 Powder, 5 parts of nickel powder, 5 parts of iron powder, 4.7 parts of tin powder, 3 parts of bismuth powder, 0.5 part of zirconia powder, 0.3 part of lanthanum powder and 70 parts of copper powder are mixed by ball milling at a speed of 350 rpm. The ball milling time was 120min; (3) The composite powder was vacuum hot-pressed and sintered at a temperature of 900°C, the pressure was 20MPa, and the heat preservation and pressure holding time was 2h; (4) The obtained block material was subjected to hot isostatic pressing for 2h, The hot isostatic pressing sintering temperature is 900°C, the pressure is 100MPa, and the aluminum oxide reinforced copper matrix composite material is obtained by rapid cooling.

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Abstract

The invention discloses an alumina-reinforced copper-based composite material, which is characterized in that it comprises the following components by weight percentage: 1-6% of modified ceramic alumina, 2-10% of graphite, Ti 3 SiC 2 0.5~5%, nickel 2~8%, iron 2~8%, tin 2~10%, bismuth 1~5%, zirconia 0.1~1%, lanthanum 0.1~0.5%, and the balance is copper; Ceramic alumina is a surface-modified Al 2 o 3 Granular and surface modified Al 2 o 3 whiskers. The Al used in the copper-based composite material of the present invention 2 o 3 particles and Al 2 o 3 The whiskers are surface-modified by sodium lauryl sulfate aqueous solution. The surface modification treatment makes the impurity content of ceramic alumina significantly reduced, and cooperates with various metal elements to assist in the joint welding structure. The combination between them is firm, and the strengthening effect is significant. When an external force is applied, a good bonding interface can more effectively play the role of load transfer, reduce stress concentration, and reduce defects.

Description

technical field [0001] The invention relates to a copper-based composite material, in particular to an alumina-reinforced copper-based composite material and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] Among metal matrix composites, copper matrix composites are widely used as electronic materials, slider materials, contact materials, heat exchange materials, etc. due to their excellent electrical and thermal conductivity. Therefore, the preparation methods and properties of copper-based composites have attracted much attention. The emergence of various ceramic particle reinforced copper matrix composites, fiber reinforced copper matrix composites, whisker reinforced copper matrix composites and carbon material reinforced copper matrix composites has greatly improved the performance of copper matrix composites, and the scope of application has also been greatly improved. Great extension. How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/14C22C47/04C22C49/02C22C49/14C22C101/04C22C121/02
CPCC22C47/04C22C47/14C22C49/02C22C49/14
Inventor 蒋小松舒锐付学敏谌金梅张归航邵甄胰朱德贵
Owner SOUTHWEST JIAOTONG UNIV
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