本次實驗研究旨在藉由摩擦攪拌製程所伴隨的大量塑性變形及摩擦熱，達到細化微結構並誘發原位反應，以製備奈米強化顆粒。
材料經過摩擦攪拌製程後，鋁晶粒呈等軸狀，晶粒尺寸可細化至1 μm。此製程所製備之鋁基奈米複合材料具有優良之機械性質，當晶粒平均徑為1.10±0.61 μm 時，固溶處理後，複合材料之降伏強度達351 MPa、最大抗拉強度為534 MPa，延伸率16.0%。

Friction stir processing was used to fabricate the aluminum based in situ composite from powder mixture of Al-Mg-ZnO. In the Al-Mg-ZnO composites, MgO particles were produced in situ by oxide-aluminum displacement reactions. Microstructural observations revealed the average Al grain size in the FSPed composite was about 1.10±0.61 μm.
The composite exhibits superior mechanical strength due to the large amount of nanometer-sized reinforcements in a submicron-grained matrix
after heat treatment.

摘要………………………………………………………………i
Abstract........................................................................ii
目錄………………………………………………………………iii
表目錄……………………………………………………………….vi
圖目錄……………………………………………………………….viii
第一章 前言
1.1 研究背景……………………………………………………1
1.2 研究動機與目的……………………………………………4
第二章 文獻回顧
2.1 摩擦攪拌銲接(Friction Stir Welding, FSW).........................5
2.2 摩擦攪拌製程(Friction Stir Process, FSP)………................5
2.3 鋁基複合材料
2.3.1 傳統鋁基複合材料………………………6
2.3.2 原位鋁基複合材料……………………….8
第三章 實驗製程
3.1 實驗方法…………………………………………15
3.2 摩擦攪拌製程…………………………………15
3.3 巨觀結構與微觀組織分析
3.3.1 X光繞射分析…………………………………16
3.3.2 掃描式電子顯微鏡觀察及分析(SEM)....……17
3.3.3 背向散射電子繞射分析(EBSD)………........ 17
3.4 機械性質量測及分析
3.4.1 微硬度試驗…………………………………19
3.4.2 拉伸測試…………………………………………19
3.5 試片命名………………………………………………19
第四章 實驗結果
4.1 X光繞射分析…………………………………………21
4.2 微結構觀察…………………………………….……21
4.3 摩擦攪拌製程參數的影響
4.3.1 轉速……………………………………………23
4.3.2 走速……………………………………………24
4.3.3 道次……………………………………………25
4.3.4 旋轉工具頭尺寸………………………………25
第五章 討論
5.1 平均晶粒徑大小……………………………………27
5.2 鋁-鎂-氧化鋅混合粉末反應產生氧化鎂的熱力學計算……27
5.3 微結構觀察與成份分析……………………………………29
5.4 X光繞射分析……………………………………………29
5.5 工程應力-應變曲線…………………………………………31
5.6 強化機構……………………………………………………35
5.7 Al-5wt%Mg-10wt%ZnO複合材料與其他成份鋁基複合材料
之機械性質比較…………………………………………37
第六章 結論………………………………………………………40
第七章 參考文獻…………………………………………………41
表……………………………………………………………………46
圖……………………………………………………………………56

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