Preparation method of metal-coated carbon nano-tube reinforced metal matrix composite

Abstract

The invention discloses a preparation method of a metal-coated carbon nano-tube reinforced metal matrix composite. The preparation method comprises the following steps that firstly, a powdered carbonnano-tube is reduced in situ to be coated with metal to obtain metal-coated carbon nano-tube composite powder, and the metal-coated nano-tube composite powder and metal powder are subjected to ball milling and powder mixing to obtain metal-coated carbon nano-tube/metal mixed powder; powder metallurgy warm compaction process is adopted, the metal-coated carbon nano-tube/metal mixed powder is subjected to warm compaction, molding and sintering, and a composite material is subjected to machine shaping to obtain the metal-coated carbon nano-tube reinforced metal matrix composite by processes suchas extrusion, forging and pressing and rolling. The preparation method of the metal-coated carbon nano-tube reinforced metal matrix composite uses the metal-coated carbon nano-tube as a reinforcing body, the contact phase boundary compatibility between the carbon nano-tube and the metal is improved, and the preparation method is simple; and the metal-coated carbon nano-tube reinforced metal matrixcomposite with good mechanical property and thermal physical property can be obtained, and wide application prospects are achieved.

Description

technical field [0001] The invention relates to a method for preparing a metal-coated carbon nanotube reinforced metal matrix composite material, and belongs to the technical field of composite material preparation. technical background [0002] Carbon nanotubes (CNTs) have shown good application prospects in many fields such as nanoelectronics, precision machinery, and medical devices due to their special mechanical, thermal, magnetic, and electrical properties since their discovery. The tensile strength of carbon nanotubes can reach 50-200GP, which is more than 100 times that of steel, and the density is only 1.35g / cm 3 , the elastic modulus is as high as 1TPa, which is about 5 times that of steel, and is considered to be the most promising ideal reinforcement for ceramics, polymers and metal matrix composites, but there are still many difficulties in strengthening metal matrix composites. The main difficulty in this is that carbon nanotubes, like other nanomaterials, hav...

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Problems solved by technology

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to solve the problem of poor interface bonding between the surface of carbon nanotubes and the metal matrix, and provide a method for in-situ reduction of coated metals on the surface of carbon nanotubes, and then compounded with metals. Thereby obtaining a kind of preparation method of metal-coated carbon nanotube reinforced metal matrix composite material