Location of Repository

Nanocrystalline and ultrafine grain copper obtained by mechanical attrition

By Rodolfo Rodríguez Baracaldo, Jose Antonio Benito Páramo and José María Cabrera Marrero

Abstract

This article presents a method for the sample preparation and characterisation of bulk copper having grain size lower than 1 μm (ultra-fine grain) and lower than 100 nm grain size (nanocrystalline). Copper is initially manufactured by a milling/alloying me- chanical method thereby obtaining a powder having a nanocrystalline structure which is then consolidated through a process of warm compaction at high pressure. Microstructural characterisation of bulk copper samples showed the evolution of grain size during all stages involved in obtaining it. The results led to determining the necessary conditions for achieving a wide range of grain sizes. Mechanical characterisation indicated an increase in microhardness to values of around 3.40 GPa for unconsolida- ted nanocrystalline powder. Compressivee strength was increased by reducing the grain size, thereby obtaining an elastic limit of 650 MPa for consolidated copper having a ~ 62 nm grain size

Topics: copper, severe plastic deformation, nanocrystalline, ultrafine grain, mechanical milling, Engineering (General). Civil engineering (General), TA1-2040, Technology, T
Publisher: Universidad Nacional de Colombia
Year: 2011
OAI identifier: oai:doaj.org/article:2598702a480b49b5a072dab923de22a1
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://doaj.org/toc/2248-8723 (external link)
  • https://doaj.org/toc/0120-5609 (external link)
  • http://www.revistas.unal.edu.c... (external link)
  • https://doaj.org/article/25987... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.