In Situ Phase Evolution of Ni/Ti Reactive Multilayers

A. J. Cavaleiro, A. S. Ramos, R. M. S. Martins, C. Baetz, M. T. Vieira, F. M. Braz Fernandes

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Joining shape-memory alloys (SMA) to other materials is strongly required in order to enlarge their fields of application. Fusion welding induces strong compositional and microstructural changes that significantly affect the shape-memory effect and the superelastic behavior of these alloys. The exothermic and in some cases self-propagating character of some nano-multilayer reactions is explored in this study as an alternative for joining SMA. To follow these very fast reactions, high brilliance sources, such as synchrotron radiation, are required. In situ high-resolution x-ray diffraction data, giving the phase evolution sequence with temperature of the Ni/Ti multilayer thin films under study, are presented. A correlation between the multilayer design and the tendency for the sequence of phase formation is established.

Original languageEnglish
Pages (from-to)2446-2449
Number of pages4
JournalJournal of Materials Engineering and Performance
Volume23
Issue number7
DOIs
Publication statusPublished - Jul 2014

Keywords

  • advanced characterization
  • intermetallic
  • x-ray
  • THIN-FILMS

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