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Effect of the deposition rate on thin films of CuZnAl obtained by thermal evaporation

Published online by Cambridge University Press:  01 February 2011

L. López-Pavón ,
E. López-Cuellar ,
A. Torres-Castro ,
C. Ballesteros  and
C. José de Araújo
L. López-Pavón
Affiliation:
FIME-UANL, Ave. Universidad S/N. Cd. Universitaria, San Nicolás de los Garza, Nuevo León, México. C.P. 66450
E. López-Cuellar
Affiliation:
FIME-UANL, Ave. Universidad S/N. Cd. Universitaria, San Nicolás de los Garza, Nuevo León, México. C.P. 66450 CIIDIT, Km. 10 de la Nueva Autopista al Aeropuerto Internacional de Monterrey, Apodaca, Nuevo León, C.P. 66600
A. Torres-Castro
Affiliation:
FIME-UANL, Ave. Universidad S/N. Cd. Universitaria, San Nicolás de los Garza, Nuevo León, México. C.P. 66450 CIIDIT, Km. 10 de la Nueva Autopista al Aeropuerto Internacional de Monterrey, Apodaca, Nuevo León, C.P. 66600
C. Ballesteros
Affiliation:
Departamento de Física, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Madrid. Spain.
C. José de Araújo
Affiliation:
Department of Mechanical Engineering, Universidade Federal de Campina Grande, Av. Aprígio Veloso, 882, Bodocongó, Campina Grande - PB, Brazil.
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Abstract

Thermal evaporation is used to deposit thin films of CuZnAl on silicon substrates. For this purpose, a CuZnAl shape memory alloy is used as evaporation source. The chemical composition and the phases present in the films are evaluated at two different deposition rates: 7 and 0.2 Å/s. The thin films are heat treated to promote the diffusion of the elements and characterized by X-ray Diffraction, Energy Dispersive X-ray Spectroscopy and Scanning Transmission Electron Microscopy (STEM). It is shown that the chemical composition of the thin films is significantly different to that of the CuZnAl alloy used as evaporation source. Moreover, the films produced at 7 Å/s show a significant loss of Zn, contrary to the results obtained using a deposition rate of 0.2 Å/s. It is also observed that the composition varies across the thickness of the film, suggesting that the various alloying elements are evaporated at different rates during the deposition process. Finally the predominant phases present in the films belong to the AlxCuy family.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1276: Advanced Structural Materials–2010 , 2010 , 4
Copyright
Copyright © Materials Research Society 2010

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