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In situ and ex situ transmission electron microscopy investigation of Cu–Al–Cu–Ti reactive metallic multilayer coatings

Published online by Cambridge University Press:  31 January 2011

M.A. Mat Yajid ,
H. Bagshaw  and
G. Möbus
M.A. Mat Yajid*
Affiliation:
Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, United Kingdom; and Department of Engineering Materials, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
G. Möbus
Affiliation:
Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, United Kingdom
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Metallic multilayers of Cu/Al/Ti composition were studied by transmission electron microscopy (TEM) and plasmon energy-loss mapping as prototypes of nanoscale reactive multilayer systems with exothermic alloy formation in oxygen-free conditions. The selection and arrangement of alloy phases by the system during ex situ and in situ heating experiments were found to depend not only on temperature but strongly on the initial volume ratios of metals, and to a lesser degree on the dimensionality of the reactive sample. Here, a two-dimensional sample was represented by ex situ heating of the full multilayer structure, a one-dimensional sample refers to in situ heating of thin cross-sectional TEM specimens, while a zero-dimensional sample (or metallic dot-array) was obtained after cutting thin pillars using focused ion beams. Lamellar self-organized alternation between Heusler phase and Cu9Al4 was found.

Keywords

CoatingNanostructureTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 6 , June 2010 , pp. 1196 - 1203
Copyright
Copyright © Materials Research Society 2010

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References

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