臺灣博碩士論文加值系統

本研究為真空中施壓於純鈦與純鎳薄片再進行熱處理，以不同熱處理條件研究純鈦與純鎳反應過程與形成TiNi記憶合金之可行性。
第一部份以製程溫度T=1348K、1355K、1361K、1373K、1393K進行持溫5分鐘真空熱處理，以OM及SEM觀察各試片於不同溫度熱處理後鈦與鎳擴散情形以及試片顯微結構變化與成分分析，發現除了最高溫T=1393K處理試片其他試片均為層狀顯微結構，各層的成份分別為純Ni、TiNi3、TiNi、富Ti區，且以製程溫度T=1373K之試片所形成的TiNi相區體積比率為最高。
第二部份以TiNi相區比率最多的[T=1373K/5min]試片為基礎，改變持溫時間分別為20分鐘及2分鐘，觀察持溫時間增加或縮短對顯微結構變化與成分的影響，其中[T=1373K/20min]試片層狀結構之界面出現裂縫，而[T=1373K/2min]試片所形成TiNi相區體積比率則稍低於[T=1373K/5min]試片中體積比。
形狀記憶效應(SME)方面，量測各種試片在重複改變溫度時之曲度形狀變化，由曲度變化求取形狀記憶效果，試片[T=1373K/2min]和試片[T=1373K/5min]的形狀記憶效果較佳，對應到此製程條件下鈦與鎳箔片擴散形成等原子比TiNi相區之體積比率為較高。

第 1 章 緒論 1
1-1前言 1
1-2研究目的 2
第 2 章 文獻回顧 3
2-1 形狀記憶合金簡介 3
2-2 形狀記憶合金的特性 4
2-2-1 熱彈性麻田散相變態 4
2-2-2 形狀記憶效應 4
2-3 超(擬)彈性 6
2-3 鈦鎳系形狀記憶合金 7
2-4 鈦鎳記憶合金各種製程 9
2-4-1 熔煉製程(Melting Metallurgy Processes) 9
2-4-2 粉末冶金製程 10
2-4-3 固態合成法(Solid Synthesis method) 14
第 3 章 實驗步驟及方法 28
3-1 實驗流程與試片製備 28
3-2 顯微結構觀察與成分分析 32
3-2-1 光學顯微鏡 (Optical Microscope, OM)觀察 32
3-2-2 掃描式電子顯微鏡 (Scanning Electron Microscope, SEM)觀察 33
3-2-3 能量散佈分析儀 (Energy Dispersive Spectrometer, EDS) 34
3-3 X-Ray繞射分析 (X-Ray Diffraction, XRD) 35
3-4 形狀記憶效應測試 (Shpae Memory Effect, SME) 36
3-5 熱示差掃描卡量計測量(Differential Scanning Calorimetry, DSC) 37
第 4 章 結果與討論 38
4-1 試片代號介紹 38
4-2 不同製程溫度真空熱處理對鈦鎳記憶合金箔片的影響 38
4-2-1 OM / SEM顯微結構觀察 38
4-2-2 EDX成分分析 49
4-2-3 X-Ray繞射分析 54
4-2-4 DSC熱分析 57
4-3 製程時間的影響 61
4-4 形狀記憶效應量測 67
4-5 本實驗製程與其他製程之比較 74
4-6 富鈦區1及富鈦區2之討論 77
第 5 章 結論 78
第 6 章 參考文獻 80
附錄 86
附錄1 不同材質板片為模具實驗 86
附錄2 板片內側加不同襯片實驗 89
附錄3 TiNi相X-Ray繞射分析圖相關文獻 92

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