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Title page for etd-0820107-165116


URN etd-0820107-165116 Statistics This thesis had been viewed 3923 times. Download 1260 times.
Author Miao-yaun Chang
Author's Email Address No Public.
Department Materials Engineering
Year 2006 Semester 2
Degree Master Type of Document Master's Thesis
Language zh-TW.Big5 Chinese Page Count 103
Title Synthesis of ternary and quaternary Mg-Ni-based amorphous alloys by mechanical alloying technique
Keyword
  • Vacuum hot pressing
  • Supercooled liguid region
  • Amorphous phase
  • Mechancial alloying;
  • Mechancial alloying;
  • Amorphous phase
  • Supercooled liguid region
  • Vacuum hot pressing
  • Abstract This study was to examined of Mg-based alloy powders amorphized by mechanically alloying and the feasibility of fabricating as-milled amorphous powders were then consolidated by vacuum hot pressing. The crystallization structure, microstructure and thermal stability during mechanical alloying of as-milled powders were investigated by X-ray diffraction, scanning electron microscopy and differential scanning calorimetry. After 12 hours milled, Mg40Ni5Cu35Ti20 amorphous powders exhibited a wide supercooled liquid region of 85K before crystallization. The as-milled Mg40Ni5Cu35Ti20 powders were consolidated at 280℃ for 10 minutes under a pressure of 1.2GPa by vacuum hot pressing into disc compacts with a diameter and thickness of 10 and 1mm, respectively, and its microhardness is 320 Hv.
    Advisor Committee
  • Chia-jung Hu - advisor
  • Files indicate in-campus access immediately and off-campus access at one year
    Date of Defense 2007-07-26 Date of Submission 2007-08-20


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