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Title page for etd-0301105-231721


URN etd-0301105-231721 Statistics This thesis had been viewed 1460 times. Download 9 times.
Author Ta-Kai Yang
Author's Email Address No Public.
Department Materials Engineering
Year 2004 Semester 1
Degree Master Type of Document Master's Thesis
Language English Page Count 88
Title Effect of Sn addition on the Cu-Zr-Ti amorphous alloys
Keyword
  • Supercooled liquid region
  • Mechanical alloying
  • Amorphous phase
  • Amorphous phase
  • Mechanical alloying
  • Supercooled liquid region
  • Abstract This study examined the effect of Sn element addition on the Cu-Zr-Ti amorphous alloys by mechanical alloying technique. The microstructural evolution during mechanical alloying of the mixed powders was investigated by both X-ray diffraction and scanning electron microscopy (SEM).The phase stabilities of the as-milled powders were studied by DSC measurement. According to the result, after 5 hours of milling, the composition of Cu-Zr-Ti-Sn alloys were all amorphization. The thermal stability of the Cu-Zr-Ti-Sn amorphous powder was also investigated by differential scanning calorimeter (DSC). As the results demonstrated, the amorphous powder were found to exhibit a wide supercooled liquid region before crystallization. The temperature interval of the supercooled liquid region was defined by the difference between Tg and Tx. The highest value of △T was found to exhibit at Cu46Zr30Ti20Sn4 alloys system (93K). Finally, the small addition of Sn element significantly improved the glass forming ability (GFA) of Cu-Zr-Ti amorphous alloys.
    Advisor Committee
  • Chia-Jung Hu - advisor
  • Hsin-Ming Wu - co-chair
  • Pee-Yew Lee - co-chair
  • Files indicate in-campus access only
    Date of Defense 2005-01-26 Date of Submission 2005-03-01


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