Pulsed laser deposition and in situ diagnostics of the process applied to shape-memory alloys |
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Authors: | A Camposeo F Fuso E Arimondo A Tuissi |
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Institution: | (1) INFM, Dipartimento di Fisica Enrico Fermi, Università di Pisa, Via F. Buonarroti 2, 56127 Pisa, Italy, IT;(2) TEMPE/CNR, Sezione di Lecco, Corso Promessi Sposi 29, 22053 Lecco, Italy, IT |
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Abstract: | NiTi films deposited by pulsed laser ablation on Si/SiO2 are shown to exhibit structural and functional properties related to the shape-memory effect. Film characterization suggests
that relevant temperatures for the solid-to-solid transformation responsible for the shape memory are in substantial agreement
with those of the bulk target material, demonstrating a good congruency of the deposition process. Besides the technological
interest for this class of thin films, our findings point out the suitability of laser ablation for metal alloy deposition.
An investigation based on in situ ion-mass spectroscopy and covariance mapping analysis allows us to determine the main vapor-phase
processes leading to the formation of stoichiometric clusters expected to play a relevant role in assisting the growth of
NiTi thin films.
Received: 6 August 2001 / Accepted: 11 April 2002 / Published online: 4 November 2002
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ID="*"Corresponding author. Fax: +39-50/2214-333, E-mail: fuso@df.unipi.it |
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Keywords: | PACS: 81 15 Fg 85 85 +j 81 30 Kf |
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