A method for preparing metal-coated carbon nanotube-reinforced metal matrix composites

Abstract

The invention discloses a method for preparing a metal-coated carbon nanotube-reinforced metal matrix composite material. The preparation method comprises the following steps: first reducing the powdered carbon nanotube to coat the metal in situ to obtain the metal-coated carbon nanotube Composite powder, and then the metal-coated carbon nanotube composite powder and metal powder are mixed by ball milling to obtain metal-coated carbon nanotube / metal mixed powder; using powder metallurgy warm pressing process, the metal-coated carbon nanotube The tube / metal mixed powder is formed by warm pressing, sintered, and composite material is processed by extrusion, forging and rolling. The invention adopts metal-coated carbon nanotubes as reinforcements, improves the compatibility of carbon nanotubes and metal contact phase boundaries, has a simple preparation method, and can obtain a metal-coated material with good mechanical properties and thermophysical properties. Carbon nanotube-reinforced metal matrix composites have broad application prospects.

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. [0002] technical background [0003] 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 nanomateri...

AI Technical Summary

Problems solved by technology

[0005] 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 the carbon nanotube reinforced metal matrix composite material coated with metal