鋁基塊狀非晶合金之粉末冶金製程研究

Formation of Al-based Bulk Amorphous Alloys by Powder Metallurgy Route

黃廷耀(Ting-Yao Huang)

指導教授 ： 胡家榮

大同大學/工程學院/材料工程學系所/碩士(2009年)

摘要

本研究主要利用機械合金法(Mechanical Alloying)來合成鋁基(Al-based)合金粉末之非晶質化行為，並以真空熱壓法成型製備Al60Ti35Ni2Si3、Al60Ti35Ni2B3、Al60Ti35Ni2Cu3、(Al75Cu17Mg8)97Ni3 、(Al75Cu19Mg6)97Ni3塊狀非晶合金，塊材孔洞的生成與成型性不佳為粉末表面氧化所導致。各塊材所得到的硬度值分別為Al60Ti35Ni2Si3 (336.2Hv)、Al60Ti35Ni2B3(315.8Hv)、Al60Ti35Ni2Cu3 (309.8Hv)、(Al75Cu17Mg8)97Ni3 (321.4Hv)、 (Al75Cu19Mg6)97Ni3 (317.6Hv)。由在3.5wt% NaCl水溶液的極化試驗得知，非晶質合金塊材有較好的抗腐蝕特性，其中以(Al75Cu17Mg8)97Ni3 、 (Al75Cu19Mg6)97Ni3 較佳。

關鍵字

機械合金法 ； 鋁基非晶質合金 ； 真空熱壓法 ； 極化試驗

並列摘要

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.

並列關鍵字

Mechanical alloying ； Al-based amorphous alloy ； Vacuum hot pressing ； polarization measurements

參考文獻

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