| Summary: | 碩士 === 大同大學 === 材料工程學系(所) === 97 === 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.
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