J Nanosci Nanotechnol. 2014 Oct;14(10):8102-5. doi: 10.1166/jnn.2014.9440.

Fabrication of nanocrystalline surface composite layer on Cu plate under ball collisions.

Journal of nanoscience and nanotechnology

S Romankov, Y C Park, J M Yoon

PMID: 25942932 DOI: 10.1166/jnn.2014.9440

Abstract

It was demonstrated that the severe plastic deformation of a surface induced by repeated ball collisions can be effectively used for fabrication of the nanocrystalline surface composite layers. The Cu disk was fixed at the top of a vibration chamber and ball treated. Al, Zr, Ni, Co and Fe were introduced into a Cu plate as contaminants from the grinding media one after the other by 15-min ball treatment. The composite structure was formed as a result of mechanical intermixing of the components. The particle size in as-fabricated layer ranged from 2 nm to 20 nm, with average values of about 7 nm. As-fabricated layer contained non-equilibrium multicomponent solid solution based on FCC Cu crystal structure, Zr-based phase, nanosized steel debris and amorphous phase. The hardness of the as-fabricated composite was almost ten times that of the initial Cu plate.

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't