Microstructures and strengthening mechanisms of Cu/Ni/W nanolayered composites

Yan, J.W., Zhang, G.P., Zhu, X.F., Liu, H.S., & Yan, C. (2013) Microstructures and strengthening mechanisms of Cu/Ni/W nanolayered composites. Philosophical Magazine, 93(5), pp. 434-448.

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Abstract

Cu/Ni/W nanolayered composites with individual layer thickness ranging from 5nm to 300nm were prepared by a magnetron sputtering system. Microstructures and strength of the nanolayered composites were investigated by using the nanoindentation method combined with theoretical analysis. Microstructure characterization revealed that the Cu/Ni/W composite consists of a typical Cu/Ni coherent interface and Cu/W and Ni/W incoherent interfaces. Cu/Ni/W composites have an ultrahigh strength and a large strengthening ability compared with bi-constituent Cu–X(X¼Ni, W, Au, Ag, Cr, Nb, etc.) nanolayered composites. Summarizing the present results and those reported in the literature, we systematically analyze the origin of the ultrahigh strength and its length scale dependence by taking into account the constituent layer properties, layer scales and heterogeneous layer/layer interface characteristics, including lattice and modulus mismatch as well as interface structure.

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ID Code: 58391
Item Type: Journal Article
Refereed: Yes
Keywords: metallic nanolayered composite, strength, length scale, interface, dislocation
DOI: 10.1080/14786435.2012.722233
ISSN: 1478-6443
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Composite and Hybrid Materials (091202)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Solid Mechanics (091308)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Taylor & Francis
Copyright Statement: This is a preprint of an article submitted for consideration in the Philosophical Magazine © 2012[copyright Taylor & Francis]; Philosophical Magazine is available online at: www.tandfonline.com
Deposited On: 19 Mar 2013 01:16
Last Modified: 04 Sep 2013 09:36

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