• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/035/03/0357-0364

    • Keywords

       

      SMA; NiTi; pulse laser; thin film; crystallization.

    • Abstract

       

      Nanosecond lasers of different intensities were pulsed into sputter-deposited amorphous thin films of near equiatomic Ni/Ti composition to produce partially crystallized highly sensitive 𝑅-phase spots surrounded by amorphous regions. Scanning electron microscopy having secondary and back-scattered electrons, field emission scanning electron microscopy, optical microscopy and X-ray diffraction patterns were used to characterize the laser treated spots. Effect of nanosecond pulse lasering on microstructure, morphology, thermal diffusion and inclusion formation was investigated. Increasing beam intensity and laser pulse-number promoted amorphous to 𝑅-phase transition. Lowering duration of the pulse incidence reduced local film oxidation and film/substrate interference.

    • Author Affiliations

       

      S K Sadrnezhaad1 Noushin Yasavol2 Mansoureh Ganjali3 Sohrab Sanjabi2

      1. Centre of Excellence for Advanced Materials, Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
      2. Department of Materials, Tarbiat Modares University, Tehran, Iran
      3. Department of New Materials, Materials and Energy Research Centre, Karaj, Iran
    • Dates

       

© 2017-2019 Indian Academy of Sciences, Bengaluru.