Abrasion-resistant electricity and heat conducting material and preparation method thereof

A technology of electrical and thermal conduction and composite materials, which is applied in the field of α-Al2O3/Cu wear-resistant, electrical and thermal conduction metal matrix composite materials and its preparation, to achieve the effects of good reinforcement effect, high hardness and excellent wear resistance

Inactive Publication Date: 2010-11-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional strengthening methods, due to their own limitations, have a certain limit to the improvement of strength and wear resistance while maintaining the high conductivity of copper.

Method used

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  • Abrasion-resistant electricity and heat conducting material and preparation method thereof
  • Abrasion-resistant electricity and heat conducting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: α-Al 2 o 3 / Cu composite material, its material ratio is: α-Al 2 o 3 / Cu mixed powder 94wt% (of which α-Al 2 o 3 Powder 15% (volume), Cu powder 85% (volume)), binder 6wt% (including HPMC15wt%, deionized water 85wt%). Seal the viscous powder and store it at room temperature for 24 hours; then press it in the mold at a speed of 2 MPa / s, and keep it for 1 minute after reaching a pressure of 300 MPa. After the pressed green body is naturally dried in the air at room temperature for 24 hours, the following comprehensive process of drying, degreasing and vacuum sintering is adopted:

[0024] Vacuum down to 10 -2 Pa; room temperature (20℃)~110℃, heating rate 10~15℃ / min; 110℃ for 2 hours; 110℃~400℃, heating rate 10~15℃ / min; 400℃ for 4 hours; 400℃~ 1030°C, heating rate 5-8°C / min; heat preservation at 1030°C for 2 hours; cooling with the furnace; open the furnace to pick up the parts when the furnace temperature drops to 120°C.

[0025] The cold plastic deforma...

Embodiment 2

[0028] Example 2: α-Al 2 o 3 / Cu composite material, its material ratio is: α-Al 2 o 3 / Cu mixed powder 94wt% (of which α-Al 2 o 3 powder 10% (volume), Cu powder 90% (volume)), binder 6wt% (including HPMC15wt%, deionized water 85wt%). Seal the viscous powder and store it at room temperature for 24 hours; then press it in the mold at a speed of 2 MPa / s, and keep it for 1 minute after reaching a pressure of 300 MPa. Subsequent process is the same as "embodiment 1".

Embodiment 3

[0029] Example 3: α-Al 2 o 3 / Cu composite material, its material ratio is: α-Al 2 o 3 / Cu mixed powder 96wt% (of which α-Al 2 o 3 powder 5% (volume), Cu powder 95% (volume)), binder 4wt% (including HPMC15wt%, deionized water 85wt%). Seal the viscous powder and store it at room temperature for 24 hours; then press it in the mold at a speed of 2 MPa / s, and keep it for 1 minute after reaching a pressure of 300 MPa. Subsequent process is the same as "embodiment 1".

[0030] In the above examples, α-Al 2 o 3 The average particle size of the powder is 7-10 μm, and the average particle size of the Cu powder is 5-20 μm.

[0031] The sintered finished product of above embodiment is done performance test, and relative density test adopts the result calculation of Archimedes method to obtain; Test its microhardness on microhardness instrument, adopt 200 gram load, hold load 15 seconds; Compressive strength R mc carried out on a mechanical testing machine for materials. The tes...

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Abstract

The invention discloses an abrasion-resistant electricity and heat conducting metal-based composite material and a preparation method thereof, and belongs to the field of abrasion-resistant electricity and heat conducting materials. The abrasion-resistant electricity and heat conducting material comprises the following components in percentage by volume: 5 to 25 percent of alpha-Al2O3 powder and 95 to 75 percent of Cu powder. The preparation method comprises the following steps of: mixing the two powder raw materials and adhesive according to a proportion; cold-pressing and shaping the fully mixed powder; naturally drying the obtained blank in room-temperature air, then thermally drying and thermally degreasing the blank under a vacuum environment, and sintering and shaping the blank under a vacuum environment or an inert gas environment with increased pressure; and treating the prepared alpha-Al2O3 / Cu composite material by adopting cold plastic deformation and secondary sintering processes. The composite material has the advantages of easily controlled material components, low cost, excellent abrasion resistance and electricity and heat conduction and the like, and can be widely applied to manufacture of abrasion-resistant electricity and heat conducting components in multiple fields.

Description

technical field [0001] The invention relates to the field of wear-resistant conductive and heat-conducting materials, and in particular provides an α-Al 2 o 3 / Cu wear-resistant, electrically and thermally conductive metal matrix composite material and preparation method thereof. Background technique [0002] With the rapid development of science and technology and the national economy, many application fields require materials with high electrical conductivity, thermal conductivity and high strength. Pure copper has high electrical and thermal conductivity but low strength and wear resistance. Traditional strengthening methods, due to their own limitations, have a certain limit to the improvement of strength and wear resistance while maintaining the high conductivity of copper. The conductivity theory points out that the scattering effect of the copper atom lattice distortion caused by the atoms in the copper matrix is ​​much stronger than the scattering effect caused by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C1/05
Inventor 张文泉曾昭锋
Owner BEIJING UNIV OF TECH
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