Stacking fault and partial dislocation dominated strengthening mechanisms in highly textured Cu/Co multilayers

Y. Liu, Y. Chen, K. Y. Yu, H. Wang, J. Chen, X. Zhang

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

We investigate the interfaces and mechanical properties of sputtered, highly (1 0 0) and (1 1 1) textured Cu/Co multilayers. In (1 0 0) Cu/Co multilayers, Co has primarily face-centered-cubic (FCC) structure and high density of inclined stacking faults (SFs). In contrast in (1 1 1) textured Cu/Co, dependent on layer thickness, high density SFs and twins parallel to layer interface are observed. When individual layer thickness, h, is a few nanometers, both systems have fully coherent FCC interface. (1 1 1) Cu/Co has similar size dependent strengthening and peak hardness compared to (1 1 1) Cu/Ni multilayers. The peak strength of (1 0 0) Cu/Co may be dominated by the transmission of partial dislocations across interface, and hence it is lower than the peak strength of (1 0 0) Cu/Ni, which is dictated by transmission of full dislocations across interfaces.

Original languageEnglish (US)
Pages (from-to)152-163
Number of pages12
JournalInternational Journal of Plasticity
Volume49
DOIs
StatePublished - Oct 2013

Keywords

  • A. Partial dislocations
  • A. Stacking faults
  • A. Strengthening
  • A. Twins
  • B. Cu/Co multilayers

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