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Preparation method for SiC coated carbon fiber reinforced metal based composite material

A composite material and fiber-reinforced technology, which is used in the preparation of SiC-coated carbon fiber-reinforced metal matrix composites, can solve various problems such as unsatisfactory performance and poor compactness

Pending Publication Date: 2021-01-29
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the technical deficiencies of poor compactness and unsatisfactory properties of existing carbon fiber reinforced metal matrix composites, the present invention provides a method for preparing SiC-coated carbon fiber reinforced metal matrix composites, aiming to obtain a carbon fiber reinforced metal matrix composite with good compactness Carbon fiber reinforced metal matrix composite material with excellent properties such as strength, toughness, etc. (the present invention is also referred to as composite material for short)

Method used

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  • Preparation method for SiC coated carbon fiber reinforced metal based composite material
  • Preparation method for SiC coated carbon fiber reinforced metal based composite material
  • Preparation method for SiC coated carbon fiber reinforced metal based composite material

Examples

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Effect test

Embodiment 1

[0089] In this example, commercially available short carbon fibers are used as objects, and the short carbon fibers have a diameter of 7 μm and a length of 1 mm. Under vacuum conditions, heat preservation at 700°C for 60min for degumming treatment; then under protective atmosphere, heat the degummed short carbon fiber bundles to 950°C for chemical vapor deposition for 6h, the carbon source gas is propylene, the dilution gas is hydrogen, the carbon source gas and The volume ratio of the dilution gas is 1:2 to obtain short carbon fibers deposited by pyrolytic carbon; finally, under a protective atmosphere, the short carbon fiber bundles deposited by pyrolytic carbon are heated to 1000°C for chemical vapor deposition for 4 hours, and the source of silicon carbide is trichloro Methylsilane, the carrier gas is hydrogen, the diluent gas is hydrogen, the volume ratio of the carrier gas and the diluent gas is 1:0.5, and short carbon fibers coated with pyrolytic carbon-silicon carbide a...

Embodiment 2

[0095]In this embodiment, 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. Under vacuum conditions, heat preservation at 750°C for 60min for degumming treatment; then under a protective atmosphere, heat the degummed short carbon fiber bundles to 950°C for chemical vapor deposition for 5h, the carbon source gas is propylene, the dilution gas is hydrogen, the carbon source gas and The volume ratio of the dilution gas is 1:2 to obtain short carbon fibers deposited by pyrolytic carbon; finally, under a protective atmosphere, the short carbon fiber bundles deposited by pyrolytic carbon are heated to 1050°C for chemical vapor deposition for 4 hours, and the source of silicon carbide is trichloro Methylsilane, the carrier gas is hydrogen, the diluent gas is hydrogen, the volume ratio of the carrier gas and the diluent gas is 1:0.5, and short carbon fibers coated with pyrolytic carbon-silicon carbi...

Embodiment 3

[0101] In this embodiment, commercially available short carbon fibers are used as objects, and the short carbon fibers have a diameter of 6 μm and a length of 2 mm. Under vacuum conditions, heat preservation at 720°C for 60min for degumming treatment; then under protective atmosphere, heat the degummed short carbon fiber bundles to 920°C for chemical vapor deposition for 6h, the carbon source gas is propylene, the diluting gas is hydrogen, the carbon source gas and The volume ratio of the dilution gas is 1:2 to obtain short carbon fibers deposited by pyrolytic carbon; finally, under a protective atmosphere, the short carbon fiber bundles deposited by pyrolytic carbon are heated to 1080°C for chemical vapor deposition for 4 hours, and the source of silicon carbide is trichloro Methylsilane, the carrier gas is hydrogen, the diluent gas is hydrogen, the volume ratio of the carrier gas and the diluent gas is 1:0.5, and short carbon fibers coated with pyrolytic carbon-silicon carbid...

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Abstract

The invention relates to a preparation method for a SiC coated carbon fiber reinforced metal based composite material. The preparation method comprises the following steps: performing pyrolytic carbondeposition-silicon carbide deposition treatment on carbon fibers, coating the carbon fibers with phenolic resin, and ball-milling with a matrix metal ball to obtain uniformly mixed powder; and performing a pressing-sintering process to obtain the composite material. Wear resistance of the carbon fibers is remarkably improved through a pyrolytic carbon deposition-silicon carbide deposition treatment method, and the problems that the carbon fibers are easily wound, are unevenly dispersed in the material and are difficult to keep in a carbon fiber structure are successfully solved in combinationwith a phenolic resin coating and ball-milling process; moreover, the carbon fibers are coated with silicon carbide, so that the problems such as uncompact interface sintering due to poor intrinsic embrittlement of the CVD coated carbon fibers, and poor wettability with most of metals are solved, room-temperature and high-temperature mechanical properties of products are greatly improved while compact sintering is realized, and wear resistance of products is especially improved greatly.

Description

technical field [0001] The invention relates to a metal-matrix composite material, in particular to a method for preparing a SiC-coated carbon fiber-reinforced metal-matrix composite material. Background technique [0002] Carbon fiber reinforced metal matrix composites have both the high electrical and thermal conductivity, good strength and toughness, and corrosion resistance of metals, as well as the high strength, high toughness, and wear resistance of carbon fibers. candidate material. [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 fiber / metal interface, such as plating metal on the surface of carbon fiber and adding other alloying elements to the metal. Reduce the interfacial wettability with carbon to improve the interfacial bonding strength of the material, and promote the reduct...

Claims

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Application Information

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IPC IPC(8): C22C47/04C22C47/14C22C49/14C22C101/10
CPCC22C47/04C22C47/14C22C49/14
Inventor 方华婵陈卓李金伟肖鹏
Owner CENT SOUTH UNIV
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