Narrow thermal hysteresis of NiTi shape memory alloy thin films with submicrometer thickness
نویسندگان
چکیده
منابع مشابه
Crystallization kinetics of amorphous NiTi shape memory alloy thin films
The temperature dependence of the crystallite nucleation and growth rates is measured for amorphous NiTi thin films. Using transmission electron microscopy, crystallites are shown to nucleate homogeneously in the film and to grow in a channeling mode. A mechanism that suppresses heterogeneous nucleation is proposed. By manipulating nucleation and growth rates, grains as large as 60 lm can be ob...
متن کاملLaser annealing of amorphous NiTi shape memory alloy thin films to locally induce shape memory properties
We present the results of a crystallization study on NiTi shape memory thin films in which amorphous films are annealed by a scanning laser. This technique has the advantage that shape memory properties can be spatially distributed as required by the application. A kinetics study shows that nucleation of the crystalline phase occurs homogenously in the films. Consequently, the laser annealing p...
متن کاملMicrostructure Evolution of On-substrate NiTi Shape Memory Alloy Thin Films
When deposited at room temperature, sputtered NiTi thin films are amorphous and need to be crystallized before they can be used as a functional material. We present the results of an annealing study on substrate-constrained NiTi shape memory thin films. Amorphous films of a NiTi shape memory alloy were deposited by UHV sputtering. Films of thickness 1.0 μm were grown on (100) Si wafers both wit...
متن کاملNanofretting behaviors of NiTi shape memory alloy
Nanofretting behaviors of NiTi shape memory alloy Linmao Qian a, Zhongrong Zhou a,∗, Qingping Sun b, Wenyi Yan c a Tribology Research Institute, National Traction Power Laboratory, Southwest Jiaotong University, Chengdu 610031, China b Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Hong Kong, China c School of Engineering and Information Technology, De...
متن کاملPrecipitation and Thermal Fatigue in Ni-Ti-Zr Shape Memory Alloy Thin Films by Combinatorial nanoCalorimetry
Thin-film samples of Ni-Ti-Zr shape memory alloys were studied by combinatorial nanocalorimetry to determine the effects of high-temperature (900°C) heat treatments and lowtemperature (450°C) thermal cycling on the characteristics of the martensite transformation. The response of the samples to heat treatments depends on composition and is controlled by a precipitation mechanism. Two precipitat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
سال: 2016
ISSN: 0734-2101,1520-8559
DOI: 10.1116/1.4959567