A research of the influence of the content and purification of CNTs on the property of composites

ABSTRACT

Firstly, purify Carbon nanotubes (CNTs) with mixed acid(the volume ratio of concentrated nitric acid to concentrated sulfuric acid is 1:3), secondly, manufacture CNTs/Al2024 composites with different CNTs content by adopting high-energy ball milling method, thirdly, shape the mix powder by using cold-pressing and sintering methods. When the content of CNTs and milling time were 1.5 wt% and 2.5 h, CNTs would disperse homogeneously with a good interfacial bonding between CNTs and Al-2024. Under this conditions, the tensile strength of the composites was 254.4 MPa compared to the matrix, up to 77.2% in tensile strength.

KEYWORDS:

• High-energy ball milling
• purification
• carbon nanotubes
• mechanical properties

Funding

Sponsored by: The Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province (item No.: 14051693).The Major Project of Yunnan Province “An applied basic research on CNTs reinforce metal matrix composites” (item No.: 2014FC001) CLC number: TB331 Document code: A.