Title page for etd-0723112-112652


[Back to Results | New Search]

URN etd-0723112-112652
Author Ting-ting Hu
Author's Email Address m993100004@student.nsysu.edu.tw
Statistics This thesis had been viewed 5334 times. Download 240 times.
Department Materials and Optoelectronic Science
Year 2011
Semester 2
Degree Master
Type of Document
Language English
Title Optical and Mechanical Properties of Thin Film Metallic Glasses
Date of Defense 2012-05-17
Page Count 96
Keyword
  • reflectivity
  • morphology of substrate
  • electrical resistivity
  • optical thin film
  • metallic glass
  • Abstract This study is separated into two parts. Firstly, the Ag thin film was deposited on substrates with different average roughness by sputtering to examine the effect of substrate roughness on optical reflection. The results exhibit 10 percent difference of reflectivity within several nanometer changing in average roughness, indicating the reflectivity is easily affected by surface roughness. Secondly, optical reflectivity and electrical resistivity of multi-component AgMgAl alloys, both crystalline and amorphous, were measured. The crystalline alloys exhibit high reflection in infrared region but a steeper drop in visible and ultraviolet regions. By contrast, amorphous alloys show a lower but relatively uniform reflectivity in the visible and infrared regions. In both cases, the reflectivity was observed to scale with the square root of electrical resistivity. The scaling law was explained based on classical reflection theory. The different scaling factors for crystalline and amorphous alloys could be rationalized by the difference in the mean free time of charge carriers. Moreover, the mechanical properties of crystalline and amorphous thin film alloys, including hardness and modulus, were measured by nanoindentation. The hardness of thin film metallic glasses (TFMGs) is obviously higher than crystalline metals, while the modulus of TFMGs is similar to crystalline metals.
    Advisory Committee
  • Jui-hung Hsu - chair
  • Cheng-tang Pan - co-chair
  • J. C. Huang - advisor
  • Files
  • etd-0723112-112652.pdf
  • Indicate in-campus at 0 year and off-campus access at 1 year.
    Date of Submission 2012-07-23

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys