Production of free standing Cu-Al intermetallics by cathodic arc plasma treatment


Arpat E., Urgen M. K.

INTERMETALLICS, vol.19, no.12, pp.1817-1822, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 12
  • Publication Date: 2011
  • Doi Number: 10.1016/j.intermet.2011.07.022
  • Title of Journal : INTERMETALLICS
  • Page Numbers: pp.1817-1822

Abstract

In this study a new approach, based on modification of surfaces by energetic ion bombardment produced through cathodic arc plasma was utilized for the production of bulk Cu-Al compounds. Alloying was done in a cyclic manner by depositing aluminum under low bias voltages, and then by enhancing diffusion/mixing by applying a high bias voltage (bombarding). During the bombarding step, substrate temperatures in a range of 750-800 degrees C can be achieved depending on the duration in a time scale of seconds where copper foils with 25 mu m thickness were used as substrates. For homogenization of the as-processed samples, a vacuum annealing heat treatment was applied at 700 degrees C for 24 h. Single phase alpha(1)-Cu solid solution, and gamma(1)-Al(4)Cu(9), delta-Al(2)Cu(3), and zeta(2)-Al(3)Cu(4) intermetallics were successfully produced. Structural and surface/cross sectional investigations of the samples were conducted with XRD, SEM and EDS measurements. The micro-hardness of the phases, was also determined. (C) 2011 Elsevier Ltd. All rights reserved.