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Journal of Nanomaterials
Volume 2013 (2013), Article ID 959738, 6 pages
http://dx.doi.org/10.1155/2013/959738
Research Article

Structure Transformation and Coherent Interface in Large Lattice-Mismatched Nanoscale Multilayers

1State Key Laboratory for Mechanical Behavior of Material, Xi’an Jiaotong University, Xi’an 710049, China
2State Key Laboratory for Mechanical Structure Strength and Vibration, Xi’an Jiaotong University, Xi’an 710049, China

Received 22 April 2013; Revised 20 June 2013; Accepted 21 June 2013

Academic Editor: Miguel A. Correa-Duarte

Copyright © 2013 J. Y. Xie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanoscale Al/W multilayers were fabricated by DC magnetron sputtering and characterized by transmission electron microscopy and high-resolution electron microscopy. Despite the large lattice mismatch and significantly different lattice structures between Al and W, a structural transition from face-centered cubic to body-centered cubic in Al layers was observed when the individual layer thickness was reduced from 5 nm to 1 nm, forming coherent Al/W interfaces. For potential mechanisms underlying the observed structure transition and forming of coherent interfaces, it was suggested that the reduction of interfacial energy and high stresses induced by large lattice-mismatch play a crucial role.