Preparation method of carbon-reinforced metal-based composite material

A composite material and metal-based technology, which is applied in the field of preparation of carbon-reinforced metal-based composite materials, can solve various problems such as unsatisfactory properties and poor compactness, and achieve the effects of low cost, improved sintering compactness and good wear resistance.

Active Publication Date: 2019-04-26
CENT SOUTH UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0007] In order to solve the technical deficiencies of poor compactness and unsatisfactory properties of existing carbon-reinforced metal matrix composites, the present invention provides a method for preparing carbon-reinforced metal-matrix composites, aiming to obtain good compactness, strength, Carbon-reinforced metal-matrix composite material with excellent toughness and other properties (the present invention is also referred to as composite material for short)

Method used

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  • Preparation method of carbon-reinforced metal-based composite material
  • Preparation method of carbon-reinforced metal-based composite material
  • Preparation method of carbon-reinforced metal-based composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0072] In Example 1, granular graphite and electrolytic copper powder are added together into ball milling equipment for high-energy ball milling. The particle diameter of the added electrolytic copper powder is 150 μm, and the particle diameter of granular graphite is 30 μm; the volume ratio of electrolytic copper powder and granular graphite is 5:1, the ball milling speed is 280r / min, the ball milling time is 8h, the ball milling balls are stainless steel balls, the ball diameter is 3mm~10mm (the mass ratio of ball milling ball diameters 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm is 4 :8:11:20:12:8:6:1), the mass ratio of the sum of the mass of granular graphite and electrolytic copper powder to the ball milling ball is 1:6.

[0073] After the ball milling, mix the copper powder embedded with granular graphite with alcohol, add ultrasonic treatment for 120min (ultrasonic frequency is 35KHz), keep the temperature of the solution at room temperature, and then vacuum-dry the solution aft...

Embodiment 2

[0078] In Example 2, commercially available short carbon fibers were used as objects, and the short carbon fibers had a diameter of 7 μm and a length of 1 mm. Under vacuum conditions, keep warm at 700°C for 60 minutes for degumming treatment; then add electrolytic copper powder to the ball mill for high-energy ball milling, the particle size of the added electrolytic copper powder is 150 μm; the volume ratio of electrolytic copper powder to degummed short carbon fiber 3:1, the ball milling speed is 250r / min, the ball milling time is 6h, the ball milling balls are stainless steel balls, the ball diameter is 3mm~10mm (the mass ratio of ball milling ball diameters 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm is 4:8:11:20:12:8:6:1), the mass ratio of the sum of the mass of degummed short fiber and electrolytic copper powder to the ball milling ball is 1:6. The SEM morphology of the prepared carbon particles embedded in copper powder is as follows: figure 2 shown.

[0079] After ball millin...

Embodiment 3

[0084] In Example 3, commercially available short carbon fibers are used as objects, and the short carbon fibers have a diameter of 8 μm and a length of 2 mm. Dissolve the prepared phenolic resin in an organic solvent to obtain a phenolic resin alcohol saturated solution; then impregnate the short carbon fibers in an 80°C phenolic resin alcohol saturated solution for 2 hours; then dry at 120°C for 2 hours. Then add electrolytic nickel powder to the ball milling equipment for high-energy ball milling, the particle size of the added electrolytic nickel powder is 150 μm; the volume ratio of electrolytic nickel powder and degummed short carbon fiber is 4:1, the ball milling speed is 300r / min, the ball milling time The milling balls are stainless steel balls with a ball diameter of 3mm to 10mm (the mass ratio of ball milling ball diameters of 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and 9mm is 4:8:11:20:12:8:6: 1), the mass ratio of the sum of the mass of the phenolic resin-coated short fiber...

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Abstract

The invention relates to a preparation method of a carbon-reinforced metal-based composite material, and belongs to the technical field of composite material preparation. Carbon material and matrix metal A are subjected to ball milling to obtain metal powder with carbon embedded into the surface and the interior; and ultrasonic and drying treatment is carried out on the carbon-embedded metal powder, the metal powder with the carbon on the surface removed and the carbon embedded internally is obtained, then the metal powder is taken as a raw material, and the ultra-fine carbon reinforced metal-based composite material is obtained through a traditional material mixing-pressing-sintering process. According to the method, the problem that interface sintering of the metal powder with the carbonembedded into the surface is not compact in the sintering process is successfully solved, so that on the premise that the metal powder is compact in sintering, the mechanical property and wear resistance of the designed and prepared metal composite material can be greatly improved, the preparation process is simple, and the cost is low.

Description

technical field [0001] The invention relates to a metal-matrix composite material, in particular to a preparation method of a carbon-reinforced metal-matrix composite material. Background technique [0002] Carbon particles (carbon fiber, graphite, etc.) reinforced metal matrix composites have both high electrical and thermal conductivity, good strength and toughness, corrosion resistance of metals, high strength and toughness of carbon fibers, and lubricating properties of graphite, etc., and are widely used in thermally conductive materials, conductive materials, Friction materials and other fields. [0003] In recent years, researchers have done a lot of research to improve the mechanical properties and high-temperature oxidation resistance of composite materials, mainly focusing on the improvement of the wettability of the carbon / metal interface, through the addition of carbon, such as the carbon surface coated with metal, metal Adding other alloying elements to reduce ...

Claims

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Application Information

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IPC IPC(8): C22C47/14C22C49/14C22C49/02C22C1/05C22C1/10B22F9/04C22C49/06C22C101/10
CPCB22F9/04B22F2009/043C22C1/05C22C47/14C22C49/02C22C49/06C22C49/14
Inventor 肖鹏方华婵李金伟
Owner CENT SOUTH UNIV
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