Rapid thermal annealing of Ti-rich TiNi thin films: A new approach to fabricate patterned shape memory thin films |
| |
Authors: | Y Motemani MJ Tan TJ White WM Huang |
| |
Affiliation: | 1. School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore;2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;3. Center for Advanced Microscopy, Australian National University, Canberra, ACT 2601, Australia |
| |
Abstract: | This paper reports the rapid thermal annealing (RTA) of Ti-rich TiNi thin films, synthesized by the co-sputtering of TiNi and Ti targets. Long-range order of aperiodic alloy could be achieved in a few seconds with the optimum temperature of 773 K. Longer annealing (773 K/240 s), transformed the film to a poorly ordered vitreous phase, suggesting a novel method for solid state amorphization. Reitveld refinement analyses showed significant differences in structural parameters of the films crystallized by rapid and conventional thermal annealing. Dependence of the elastic modulus on the valence electron density (VED) of the crystallized films was studied. It is suggested that RTA provides a new approach to fabricate patterned shape memory thin films. |
| |
Keywords: | Intermetallics Heat treatments Crystalline state X-ray analysis |
本文献已被 ScienceDirect 等数据库收录! |
|