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Microcompression study of Al-Nb nanoscale multilayers

Published online by Cambridge University Press:  20 January 2012

Youbin Kim ,
Arief Suriadi Budiman ,
J. Kevin Baldwin ,
Nathan A. Mara ,
Amit Misra  and
Seung Min Han
Youbin Kim
Affiliation:
Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Yuseong Gu, Daejeon 305-701, Republic Korea
Arief Suriadi Budiman
Affiliation:
Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory (LANL), Los Alamos, New Mexico 87545
J. Kevin Baldwin
Affiliation:
Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory (LANL), Los Alamos, New Mexico 87545
Nathan A. Mara
Affiliation:
Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory (LANL), Los Alamos, New Mexico 87545
Amit Misra
Affiliation:
Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory (LANL), Los Alamos, New Mexico 87545
Seung Min Han*
Affiliation:
Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Yuseong Gu, Daejeon 35-701, Republic Korea
*
a)Address all correspondence to this author. e-mail: smhan01@kaist.ac.kr
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Abstract

Microcompression tests were performed on the Al/Nb multilayers of incoherent interfaces with the layer thicknesses of 5 nm Al/5 nm Nb and 50 nm Al/50 nm Nb. The Al-Nb multilayers showed increase in strength as the layer thickness was reduced; the average flow stresses at 5% plastic strain from the 5 nm Al/5 nm Nb and 50 nm Al/50 nm Nb layer thickness specimens were determined to be 2.1 GPa and 1.4 GPa respectively. The results from this Al-Nb microcompression study were compared with those of the previous report on Cu-Nb multilayer microcompression results that indicated that the flow stresses of the Al-Nb multilayer are lower than those of Cu-Nb with the same bilayer spacing. The observed difference in strength was attributed to a potential difference in the interfacial strength of the two incoherent multilayer systems.

Keywords

LayeredStrengthNanoscale
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 3: Focus Issue: Advances in Mechanics of One-Dimensional Micro/Nanomaterials , 14 February 2012 , pp. 592 - 598
Copyright
Copyright © Materials Research Society 2012

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