Ni-Ti Shape Memory Alloy Thin Film

Ni-Ti Shape Memory Alloys (SMA) alloys have been attracting attention due to a number of desirable properties (shape memory effect,...)
The basis of the shape memory effect is a reversible solid-state phase transformation. Ni-Ti SMA transform martensitically from B2 cubic austenite into monoclinic B19' martensite either directly or via rhombohedral R-phase.
In the form of films they have also the potential for batch fabrication and, thus, Ni-Ti films are attractive materials for microfabrication and integration in micro-miniature systems composed of mechanical elements, actuators, sensors and electronics made on one chip.
Applications? ...use your imagination...

Category:

Science & Technology

Tags:

• Ni-Ti
• NiTi
• TiNi
• SMA
• Shape
• Memory
• Alloy
• Thin
• Film
• Phase
• Transformation
• Austenite
• R-phase
• Sputtering
• memoria
• di
• forma
• shape
• memory
• alloy
• sma
• nitinol

[Caelsus]

I have heard about shape memory polymers!

Do they exist?? What's the main compound of this polymers?

[VIMEIRO1]

"Polymers with shape memory have both a visible, current form and a stored, permanent form. Once the latter has been produced by conventional methods, the material is molded into a second, temporary form by skillful heating, deformation, and finally, cooling. The plastic maintains this shape until the permanent form is recalled by a predetermined external stimulus.

[VIMEIRO1]

"The secret behind these clever materials lies in their molecular network structure, which contains meltable "switching segments." Raising the temperature activates the switching: the crystallized switching segments melt and the material resumes its original form."

[rarathorat]

cool.. did u prepared NiTi thin film by yourself or got it from special metals ?

[VIMEIRO1]

Hi!

The films were deposited by co-sputtering (using a Ni-Ti and a Ti target) in a chamber specially designed for in situ X-ray measurements, enabling an in-situ characterization by X-ray diffraction of the films during their growth. Intermediate structural states of the growing film have been identified, which cannot be seen/revealed ex-situ, because those states occurred only during the growth but were no longer detectable after deposition.

[VIMEIRO1]

I have worked on the optimisation of the deposition conditions of films of Ni-Ti during my PhD work.

If you have more questions please contact me at any time

[krap101]

@Caelsus There are a few. Check out electroactive polymer as well as magnetic shape memory alloy

[WhereEaglesDareUK]

bnp

[Bugstomper2]

I remember!