臺灣博碩士論文加值系統

鎂合金添加於Sn-3Ag-0.5Cu無鉛銲錫合金中能有效提升銲錫的潤濕性，可直接對許多難潤濕的陶瓷、玻璃、鋁合金或鎂合金等材料進行接合。銲錫合金中鎂合金與錫、銀反應生成的Mg2Sn與(Ag,Mg)3Sn介金屬會造成錫鬚的異常成長。本研究藉由時效處理探討Mg2Sn、(Ag,Mg)3Sn介金屬形成與時效溫度及時效時間對含鎂之Sn-3Ag-0.5Cu合金錫鬚成長的影響。隨著鎂合金在Sn-3Ag-0.5Cu合金中的添加量增加，會因內應力的增加而使得錫鬚數量明顯變多，然而卻可抑制銲錫中的Cu6Sn5介金屬的生成。隨著時效溫度提高及時效時間增加，會造成錫鬚的數量與長度增加。由於銲錫合金內應力的不斷釋放，經150℃時效反應錫鬚初期成長速率快，隨著時效反應達400hr其成長速率會逐漸減緩。

Adding magnesium alloy in Sn-3Ag-0.5Cu lead-free solders alloy can effectively improve the wettability of the solders. It can directly wet many materials which are difficult to be wetted, such as ceramics, glass, aluminum or magnesium alloys. Magnesium reacts with tin in solders to form Mg2Sn and (Ag,Mg)3Sn intermetallic compounds. The intermetallic compounds cause tin whisker abnormal growth. As inner stress is increased, the amount of tin wisker will be increased. The amount and length of tin whisker will increase with the increase of aging temperature and aging duration. However, the magnesium alloy will restrain the formation of Cu6Sn5 in solders.Tin whiskers graw rapidly during the initial stage of the aging duration at 150℃.When aging duration is over 400hr the growth rate of tin whiskers is slowndown.

中文摘要......................................i
英文摘要......................................ii
誌謝..........................................iii
目錄..........................................iv
表目錄........................................ix
圖目錄........................................xiv
第一章 前言...................................01
第二章 理論與文獻回顧.........................02
2.1傳統錫鉛銲錫之特性.........................02
2.2無鉛銲錫之發展.............................07
2.3無鉛銲錫之特性.............................09
2.4 Sn-Ag-Cu無鉛銲錫添加第四元素之研究........12
2.4.1 添加Ni元素之影響........................13
2.4.2 添加Bi元素之影響........................14
2.4.3 添加Sb元素之影響........................14
2.4.4 添加Zn元素之影響........................15
2.4.5 添加Mg元素之影響........................15
2.4.6 添加Ti元素之影響........................15
2.4.7 添加稀土元素之影響......................15
2.5 鎂元素特性及對銲錫性質之影響..............17
2.6 錫鬚成長理論..............................18
2.7 錫鬚之成長機構............................18
2.7.1 差排理論................................19 2.7.2 再結晶理論..............................19
2.7.3壓應力理論...............................20
2.7.4 氧化層理論..............................22
第三章 實驗步驟與方法.........................23
3.1 實驗材料..................................23
3.2 試驗項目..................................24
3.2.1熱分析試驗...............................24
3.2.2 XRD分析.................................24
3.2.3微硬度試驗...............................24
3.2.4時效試驗.................................24
3.3實驗流程...................................25
3.3.1填料合金配製.............................26
3.4錫鬚觀察...................................26
第四章 實驗結果與討論.........................27
4.1填料合金金相微結構.........................27
4.2填料合金DSC熱分析試驗......................29
4.3填料合金XRD分析結果........................30
4.4填料合金硬度分析...........................33
4.5填料合金Mapping分析........................36
4.5.1 Sn-3Ag-0.5Cu添加2.2wt％LAZ931鎂合金Mapping分析..........................................37
4.5.2 Sn-3Ag-0.5Cu添加2.5wt％LAZ931鎂合金Mapping分析..........................................38
4.5.3 Sn-3Ag-0.5Cu(Ni,Ge)添加2.2wt％LAZ931鎂合金Mapping分析...................................38
4.5.4 Sn-3Ag-0.5Cu(Ni,Ge)添加2.5wt％LAZ931鎂合金Mapping分析...................................40
4.6 Sn-3Ag-0.5Cu添加2.2wt％LAZ931鎂合金在25℃、100℃、150℃持溫下經時效觀察錫鬚成長..........44
4.6.1 Sn-3Ag-0.5Cu添加2.2wt％LAZ931鎂合金在25℃下觀察錫鬚成長..................................46
4.6.2 Sn-3Ag-0.5Cu添加2.2wt％LAZ931鎂合金在100℃下觀察錫鬚成長................................46
4.6.3 Sn-3Ag-0.5Cu添加2.2wt％LAZ931鎂合金在150℃下觀察錫鬚成長................................48
4.7 Sn-3Ag-0.5Cu添加2.5wt％LAZ931鎂合金在25℃、100℃、150℃持溫下經時效觀察錫鬚成長..........48
4.7.1 Sn-3Ag-0.5Cu添加2.5wt％LAZ931鎂合金在25℃下觀察錫鬚成長..................................49
4.7.2 Sn-3Ag-0.5Cu添加2.5wt％LAZ931鎂合金在100℃下觀察錫鬚成長................................52
4.7.3 Sn-3Ag-0.5Cu添加2.5wt％LAZ931鎂合金在150℃下觀察錫鬚成長................................52
4.8 Sn-3Ag-0.5Cu(Ni,Ge)添加2.2wt％LAZ931鎂合金在25℃、100℃、150℃持溫下經時效觀察錫鬚成長....54
4.8.1 Sn-3Ag-0.5Cu(Ni，Ge)添加2.2wt％LAZ931鎂合金在25℃觀察錫鬚成長............................56
4.8.2 Sn-3Ag-0.5Cu(Ni，Ge)添加2.2wt％LAZ931鎂合金在100℃下觀察錫鬚成長.........................58
4.8.3 Sn-3Ag-0.5Cu(Ni，Ge)添加2.2wt％LAZ931鎂合金在150℃下觀察錫鬚成長.........................58
4.9 Sn-3Ag-0.5Cu(Ni,Ge)添加2.5wt％LAZ931鎂合金在25℃、100℃、150℃持溫下經時效觀察錫鬚成長....60
4.9.1 Sn-3Ag-0.5Cu(Ni，Ge)添加2.5wt％LAZ931鎂合金在25℃下觀察錫鬚成長..........................61
4.9.2 Sn-3Ag-0.5Cu(Ni，Ge)添加2.5wt％LAZ931鎂合金在100℃下觀察錫鬚成長.........................64
4.9.3 Sn-3Ag-0.5Cu(Ni，Ge)添加2.5wt％LAZ931鎂合金在150℃下觀察錫鬚成長.........................66
4.10 Sn-3Ag-0.5Cu及Sn-3Ag-0.5Cu(Ni，Ge)添加2.2、2.5 wt％LAZ931鎂合金在150℃下經200hr、400hr後XRD分析結果比較..................................68
4.10.1 Sn-3Ag-0.5Cu添加2.2 wt％LAZ931鎂合金在150℃時經200hr、400hr後XRD分析結果比較........74
4.10.2 Sn-3Ag-0.5Cu添加2.5 wt％LAZ931鎂合金在150℃時經200hr、400hr後XRD分析結果比較........75
4.10.3 Sn-3Ag-0.5Cu(Ni,Ge)添加2.2 wt％LAZ931鎂合金在150℃時經200hr、400hr後XRD分析結果比......76
4.10.4 Sn-3Ag-0.5Cu(Ni,Ge)添加2.5wt％LAZ931鎂合金在150℃時經200hr、400hr後XRD分析結果比較......77
第五章 結論...................................78
參考文獻......................................79

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