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URN etd-0909109-025412 Statistics This thesis had been viewed 3065 times. Download 1313 times. Author Ting-Yao Huang Author's Email Address No Public. Department Materials Engineering Year 2008 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 100 Title Formation of Al-based Bulk Amorphous Alloys by Powder Metallurgy Route Keyword polarization measurements Vacuum hot pressing Al-based amorphous alloy Mechanical alloying Mechanical alloying Al-based amorphous alloy Vacuum hot pressing polarization measurements Abstract This study examined the amorphization behavior of Al-based alloy powders synthesized by mechanical alloying technique and consolidated by vacuum hot pressing for Al60Ti35Ni2Si3, Al60Ti35Ni2B3, Al60Ti35Ni2Cu3, (Al75Cu17Mg8)97Ni3 and (Al75Cu19Mg6)97Ni3 alloys. Surface oxidation of powders in milling and consolidation processes led to larger amount of porosity and bad bulk forming ability. In addition, the hardness of the bulk amorphous alloys is 336.2 Hv for Al60Ti35Ni2Si3, 315.8 Hv for Al60Ti35Ni2B3, 309.8 Hv for Al60Ti35Ni2Cu3, 321.4 Hv for (Al75Cu17Mg8)97Ni3 and 317.6 Hv for (Al75Cu19Mg6)97Ni3, respectively. Furthermore, (Al75Cu17Mg8)97Ni3 and (Al75Cu19Mg6)97Ni3 bulk amorphous alloys were found to exhibit a better corrosion resistance evaluated by potentiodynamic polarization measurements in 3.5wt% NaCl solution. Advisor Committee Chia-Jung Hu - advisor
Files Date of Defense 2009-07-30 Date of Submission 2009-09-09