火花電漿燒結(Spark Plasma Sintering)是最近熱門粉末冶金技術之一，其優點為快速燒結與高緻密化。本文研究即以快速凝固霧化(Rapid-Solidifying Atomization,RSA)製作6061鋁合金粉末，再以火花電漿燒結技術(SPS)固結粉末，其分別分為九組不同參數(溫度、時間) 對微結構與機械性質之影響也將於本文中被討論。將此九組SPS樣本與6061鋁合金原材分別進行室溫壓縮及微硬度測試，分別選擇其中擁有最高強度的組別利用背向式擠型分析其加工性，且繪製其極限圖(limit diagram)。目前的研究成果顯示以快速凝固霧化法所得之粉末其晶粒<2μm，將粉末於400℃持溫燒結10分鐘後，SPS 6061鋁合金之壓縮強度與硬度較鑄造材分別高1.6倍與1.5倍。此外，材料之加工性質透過背向式擠型分析後，於擠型極限圖中顯示其加工範圍擴增。SPSed 6061鋁合金亦展現了較高拉伸強度和延性。

Spark Plasma Sintering (SPS) is one of the promising PM techniques in recent years, with which sintering process can be accomplished in a relatively short time. In this study, SPS was used to consolidate the AA6061 Al alloy powders synthesized by Rapid-solid Atomization (RSA) with grain sizes of less than 2μm, in which nine sets of parameters, temperature and time, were designed to study the effects of the parameters on the microstructure and mechanical properties. The micro-hardness and compressive properties of the nine SPSed specimens and conventional cast 6061 alloy were tested and compared. The highest compressive strength and hardness were obtained with the specimen SPSed at 400oC for 10 minutes. The compressive strength and hardness of SPSed 6061 are 1.6 times and 1.5 times higher than those of the conventional cast 6061, respectively. The SPSed 6061 with the highest compressive strength and conventional cast 6061were then extruded with backward extrusion method to study the workability of the SPSed 6061, and Workability Limit Diagram was plotted accordingly, which shows that the SPSed 6061 has better workability than conventional cast 6061. The extruded SPSed 6061 and conventional cast 6061 were then tensile-tested, and the SPSed 6061 has higher UTS and ductility than as-cast ones.

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