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

doi:10.1016/j.ijplas.2013.03.005

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

Chemical Engineering and Materials Science

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116 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 language	English (US)
Pages (from-to)	152-163
Number of pages	12
Journal	International Journal of Plasticity
Volume	49
DOIs	https://doi.org/10.1016/j.ijplas.2013.03.005
State	Published - Oct 2013

Bibliographical note

Funding Information:
We acknowledge financial support by NSF-DMR , under Grant No. 0644835 , and partial financial support by NSF-CMMI 1129065 . J. Chen acknowledges the NSFC (Grant No. 50801036 ) for part of financial support for the collaboration. Access to the microscopes at the Microscopy and Imaging Center at Texas A&M University is also acknowledged.

Keywords

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

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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.",

keywords = "A. Partial dislocations, A. Stacking faults, A. Strengthening, A. Twins, B. Cu/Co multilayers",

author = "Y. Liu and Y. Chen and Yu, {K. Y.} and H. Wang and J. Chen and X. Zhang",

note = "Funding Information: We acknowledge financial support by NSF-DMR , under Grant No. 0644835 , and partial financial support by NSF-CMMI 1129065 . J. Chen acknowledges the NSFC (Grant No. 50801036 ) for part of financial support for the collaboration. Access to the microscopes at the Microscopy and Imaging Center at Texas A&M University is also acknowledged. ",

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AU - Yu, K. Y.

AU - Wang, H.

AU - Chen, J.

AU - Zhang, X.

N1 - Funding Information: We acknowledge financial support by NSF-DMR , under Grant No. 0644835 , and partial financial support by NSF-CMMI 1129065 . J. Chen acknowledges the NSFC (Grant No. 50801036 ) for part of financial support for the collaboration. Access to the microscopes at the Microscopy and Imaging Center at Texas A&M University is also acknowledged.

PY - 2013/10

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N2 - 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.

AB - 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.

KW - A. Partial dislocations

KW - A. Stacking faults

KW - A. Strengthening

KW - A. Twins

KW - B. Cu/Co multilayers

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

Abstract

Bibliographical note

Keywords

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