%0 conference lecture
%@ 
%A Martins, R.M.S., Schell, N., Gordo, P.R., Maneira, M.J.P., Silva, R.J.C., Braz Fernandes, F.M.

%D 2009
%J 7th Iberian Vacuum Meeting and the 5th European Topical Conference on Hard Coatings

 

%T Development of sputtered Shape Memory Alloy (SMA) Ni–Ti films for actuation in ice cooled environments
%U 
 
%X After the characterization described above, the film was removed from the substrate. The free-standing film showed a pronounced “two-way” shape memory effect (SME). In the austenitic state the film presents a flat shape. During cooling, by reducing its distance from ice cubes (i.e., decreasing the surrounding temperature), the film starts bending exhibiting a final curled shape (yet without touching the ice). On heating it recovers its flat shape. The authors attribute the nature of this “two-way” SME to the Ni4Ti3 precipitates that formed during the heat treatment.