臺灣博碩士論文加值系統

本次實驗使用AA6101鋁合金，添加0.1wt.%、0.3wt.%及0.5wt.%之高純度鈰元素，利用高週波感應真空熔煉爐製成合金，再進行固溶化處理和T6人工時效處理後，分別作OM光學顯微鏡分析、SEM掃描式電子顯微鏡分析、EDS能量散射質譜儀分析、XRD繞射儀分析、維氏硬度分析及導電率分析，觀察其顯微組織的變化和硬度的改變。
AA6101鋁合金原材熔煉基地相中主要的析出物為條狀的Mg2Si，經過8小時人工時效處理後，硬度有明顯的提升，而經過12小時人工時效處理後，硬度開始下降，發生過時效的現象，而導電率有隨著時效處理時間增長的趨勢。
AA6101鋁合金在添加鈰後，其硬度與導電率都有明顯的提升。內部矽與鐵原子更偏好與鈰反應，形成金屬間化合物Ce3Al4Si6與Al1.8CeFe0.2，Ce3Al4Si6與Al1.8CeFe0.2的析出都會使其硬度提升，而Ce3Al4Si6的析出會使導電率增加，Al1.8CeFe0.2則相反。添加0.3wt.% Ce進行8小時人工時效時，能獲得最平衡的性質，擁有夠高的導電率，也還保有一定的硬度。

In this experiment, AA6101 aluminum alloy was used with the addition of 0.1wt.%, 0.3wt.%, and 0.5wt.% of high-purity cerium (Ce) element. The alloy was produced using a high-frequency induction vacuum melting furnace, followed by solution treatment and T6 artificial aging treatment. Optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Vickers hardness analysis, and conductivity analysis were conducted to observe the changes in the microstructure and mechanical strength.
In AA6101 aluminum alloy, the primary precipitate in the base phase is dendritic Mg2Si. After 8 hours of artificial aging treatment, there is a significant increase in hardness. However, after 12 hours of artificial aging treatment, the hardness begins to decrease, indicating over-aging phenomenon. On the other hand, the conductivity shows an increasing trend with the lengthening of the aging treatment time.
After the addition of cerium, AA6101 aluminum alloy exhibits a noticeable increase in both hardness and conductivity. Silicon and iron atoms within the alloy exhibit a stronger preference for reacting with cerium. This leads to the formation of intermetallic compounds, namely Ce3Al4Si6 and Al1.8CeFe0.2.The precipitation of both Ce3Al4Si6 and Al1.8CeFe0.2 compounds contributes to an increase in hardness. However, the precipitation of Ce3Al4Si6 also leads to an increase in conductivity, while the opposite effect is observed with Al1.8CeFe0.2. By adding 0.3wt.% of cerium and subjecting the alloy to an 8-hour artificial aging treatment, the most balanced properties can be achieved. This composition exhibits a sufficiently high conductivity while still maintaining a certain level of hardness.

摘要……………………………………………………………………………………………. i
Abstract ………………………………………………………………………………………. ii
誌謝………………………………………………………………………………………….. iii
目錄…………………………………………………………………………………………... iv
表目錄………………………………………………………………………………………... vi
圖目錄……………………………………………………………………………………..... vii
第一章 緒論…………………………………………………………………….……………. 1
1.1前言…………………………………………………………………….……………. 1
1.2研究動機……………………………………………………………………….……. 1
第二章 理論基礎及文獻回顧………………………………………………………………...2
2.1鋁合金介紹………………………………………………………………...................2
2.2鋁合金的分類……………………………………………………………...................2
2.3鋁合金後處理分類…………………………………………………………...............4
2.4 6XXX系列鋁合金之介紹……………………………………………………...........5
2.5常見合金元素對鋁合金之影響……………………………………………………...6
2.6鋁合金的強化機制……………………………………………………………….....11
2.7鋁合金的熱處理………………………………………………………………….....14
2.8國內外相關研究………………………………………………………………….....15
第三章 實驗方法……………………………………………………………………...……. 21
3.1實驗步驟………………………………………………………………….................21
3.2實驗用合金製備………………………………………………………….................22
3.3實驗用合金熱處理……………………………………………………….................23
3.4 OM光學顯微鏡分析……………………………………………………….............24
3.5 SEM掃描式電子顯微鏡分析………………………………………………...........25
3.6 EDS能量散射質譜儀分析……………………………………………….…...........26
3.7 XRD繞射儀分析…………………………………………………...…….…...........27
3.8維氏硬度分析…………………………………………………...…….….................28
3.9導電率分析…………………………………………………...…….….....................29
第四章 實驗結果與討論……………………………………………...…….….....................30
4.1 OM光學顯微鏡分析………………………………………...…….….....................30
4.2 XRD繞射儀分析……………………………………………...…….…...................36
4.3 SEM與EDS分析……………………………………………...…….…..................39
4.4 HV維氏硬度分析……………………………………………...…….…..................69
4.5導電率分析…………………………………………………...…….….....................70
第五章 結論…………………………………………………...…….….................................71
參考文獻…………………………………………………...…….….......................................72
Extended Abstract…………………………………………...…….….....................................75

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