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URN etd-0821107-132844 Statistics This thesis had been viewed 4162 times. Download 1437 times. Author Yen-Chih Peng 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 166 Title Synthesis of Cu-Ti-based Amorphous Powders and Investigation of Consolidation
by Vacuum Hot Pressing
Keyword Vacuum hot pressing Glass transition Supercooled liquid region Cu-based amorphous alloy Mechanical alloying Mechanical alloying Cu-based amorphous alloy Supercooled liquid region Glass transition Vacuum hot pressing Abstract This study examined the amorphization behavior of Cu-based alloy powders synthesized by mechanical alloying technique and investigation of consolidation by vacuum hot pressing. Several amorphous powders were found to exhibit a wide supercooled liquid region before crystallization.The temperature interval of the supercooled liquid region (△Tx) are 41.13 K, 80.72 K, 79.44 K, 91.14 K, 92.85 K and 95.55 K for Cu50-xTi40Fe10Snx(x=1, 3, 5, 8, 10, 12 at%), 40.46 K and 47.08 K for Cu50-xTi40Fe10(SnB3)x(x=10, 12 at%). The addition of Sn and B significantly improved the glass forming ability (GFA) of the Cu-Ti-Fe amorphous alloy. Cu40Ti40Fe10Sn10 amorphous alloy that were consolidated at temperature range of 360℃ to 400℃ are fully dense (99%) and maintain the chemical homogeneous glassy structure. Advisor Committee Chia-Jung Hu - advisor
Files Date of Defense 2007-07-26 Date of Submission 2007-08-21