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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 蔡曜陽 | |
dc.contributor.author | Wei-Chen Chen | en |
dc.contributor.author | 陳維辰 | zh_TW |
dc.date.accessioned | 2021-06-15T04:52:07Z | - |
dc.date.available | 2015-09-01 | |
dc.date.copyright | 2010-08-04 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-07-30 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46041 | - |
dc.description.abstract | 鈦的氧化層生成傳統上以陽極處理為主,近年來也有學者成功以放電加工生成之,但無論生成方法為何,除非以染料染色,否則至今罕有方法可直接在鈦金屬表面生成白色氧化層。
本研究使用一般商用的放電加工機,以石墨為電極,自來水為加工液,在純鈦工件上加工生成白色氧化層並探討放電加工主要參數對該層生成的影響。研究結果顯示極性是決定白色氧化層生成與否的首要條件,白色氧化層只有在純鈦工件接陽極時才有可能生成;純鈦工件接負極時,生成的反而是塊狀結晶物。經由SEM觀察、EDS分析、XRD晶格結構判別及AES縱深分析後得到純鈦工件接陽極時所生成的白色氧化層乃是由從純鈦工件表面析出的二氧化鈦(TiO2,anatase)晶粒所組成,析出高度約5∼6 μm;純鈦工件接陰極時所產生的塊狀結晶物是氧化鈣(CaO)結晶,邊長約1∼2 μm。 另外以開路電壓、on time、off time、加工電流、加工時間、放電時間、電極拉起距離及間隙電壓等八個參數配合田口方法中的直交表來探討白色氧化層的生成條件。發現影響白色氧化層生成的重要因子依序為開路電壓(貢獻度50.85%)、加工時間(貢獻度14.49%)、on time(貢獻度11.42%)及off time(貢獻度8.06%)。白色氧化層的生成,必頇在特定條件下,即開路電壓要大(220 V)、加工時間要足夠(2 min),on time與off time的比例要適當,否則白色氧化層的寬度將減小,甚至沒有生成。最佳化條件為開路電壓 = 220 V、加工時間 = 2 min、on time = 400 μs、off time = 4 μs、電極拉起距離 = 1.5 mm、放電時間 = 5 sec、間隙電壓 = 60 V及加工電流 = 1.5 A,此條件下白色環的寬度可達1900 μm。 | zh_TW |
dc.description.abstract | The main process to fabricate titanium oxide layers is traditional anodizing although some researchers developed EDM process to fabricate it. So far there are few methods to fabricate white titanium oxide layers on the titanium workpiece surface directly except for dyeing.
A commercial EDM machine was used in the study. Graphite was used as electrode, pure titanium was used as workpiece and dielectric fluid was tap water. The study investigated the influence of EDM parameters including open voltage, on time, off time, peak current, machining time, discharging time, electrode pulled distance and gap voltage on fabricating white titanium oxide layers. Taguchi method was applied in the experiments to find the growth conditions of white titanium oxide layers. The result reveals the polarity is the main key to fabricate white titanium oxide layers. The pure titanium workpiece must be connected to anode for fabricating white titanium oxide layers. If The pure titanium workpiece was connected to cathode, the products were cubic crystals instead. According to the analysis of SEM, EDS, XRD and AES depth profiling analysis, The white titanium oxide layers consist of titanium dioxide (anatase) grains which precipitated from the surface of pure titanium workpiece. The height of the grains is about 5 ~ 6 μm. When the pure titanium substrate connected to cathode, the produced cubic crystals are crystalline calcium oxides (CaO) with a side length of 1 ~ 2 μm. The degree of significant factors influencing the width of white titanium oxide layers from large to small as follows: open voltage (50.85% contribution), machining time (14.49% contribution), on time (11.42% contribution) and off time (8.06% contribution). Larger open voltage can form wider width of white titanium oxide layers. had better set to be be large (220 V). The machining time to be long enough (2 min). The ratio of on time and off time must to be appropriate to obtain there were seldom white titanium oxide layers. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T04:52:07Z (GMT). No. of bitstreams: 1 ntu-99-R97522719-1.pdf: 9079789 bytes, checksum: 8701f836c9687bb761de0cf590cbe2d1 (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 誌謝 ..................................................................................... V
摘要 ..................................................................................... IX Abstract ................................................................................. XI 目錄 ..................................................................................... XIII 圖目錄 ................................................................................... XVII 表目錄 ................................................................................... XXI 第一章 緒論 .............................................................................. 1 1.1 研究背景 ............................................................................. 1 1.2 文獻回顧 ............................................................................. 4 1.3 研究目的 ............................................................................. 16 1.4 論文架構 ............................................................................. 17 第二章 相關理論基礎 ...................................................................... 19 2.1 放電加工製程 ......................................................................... 19 2.1.1 放電加工起源 ....................................................................... 19 2.1.2 放電加工原理 ....................................................................... 24 2.1.3 放電加工參數 ....................................................................... 27 2.1.4 參數組合與加工特性之關係 ........................................................... 31 2.1.5 加工液 ............................................................................. 33 2.1.6 電解現象 ........................................................................... 35 2.2 鈦金屬 ............................................................................... 36 2.2.1 鈦合金元素與分類 ................................................................... 38 2.2.2 鈦金屬應用 ......................................................................... 46 2.3 二氧化鈦 ............................................................................. 47 2.3.1 二氧化鈦的性質與分類 ............................................................... 47 2.3.2 氧化鈦發色機制 ..................................................................... 49 2.4 氫化鈦 ............................................................................... 50 2.5 鈦的陽極處理 ......................................................................... 51 2.6 田口方法 ............................................................................. 53 2.6.1 田口實驗法 ......................................................................... 55 2.6.2 直交表 ............................................................................. 57 2.6.3 SN比 ............................................................................... 58 2.6.4 變異數分析 ......................................................................... 59 第三章 實驗方法與步驟 .................................................................... 63 3.1 實驗規劃 ............................................................................. 63 3.2 實驗參數 ............................................................................. 65 3.2.1 因子與水準 ......................................................................... 65 3.2.2 反應 ............................................................................... 67 3.3 實驗材料 ............................................................................. 69 3.3.1 電極材料 ........................................................................... 69 3.3.2 工件材料 ........................................................................... 70 3.3.3 加工液 ............................................................................. 71 3.4 實驗設備 ............................................................................. 73 3.5 量測儀器 ............................................................................. 75 3.5.1 掃描式電子顯微鏡 ................................................................... 75 3.5.2 能量散佈光譜儀 ..................................................................... 77 3.5.3 歐傑電子能譜儀 ..................................................................... 80 3.5.4 X光繞射儀 .......................................................................... 82 3.5.5 表面粗糙度儀 ....................................................................... 85 第四章 實驗結果與討論 .................................................................... 89 4.1 初期實驗 ............................................................................. 89 4.2 白色環的因子分析 ..................................................................... 93 4.2.1 SN比分析 ........................................................................... 95 4.2.2 變異數分析 ......................................................................... 99 4.2.3 因子效果討論 ....................................................................... 102 4.2.3 確認最佳化結果 ..................................................................... 104 4.3 極性的影響 ........................................................................... 106 4.4 SEM觀察 .............................................................................. 108 4.4.1 表面觀察與EDS分析 .................................................................. 108 4.4.2 斷面觀察與EDS分析 .................................................................. 119 4.4.3 氧化層的厚度變化 ................................................................... 128 4.5 AES縱深分析 .......................................................................... 132 4.6 X光繞射分析 .......................................................................... 134 4.7 表面粗糙度 ........................................................................... 136 4.8 生長機制推論 ......................................................................... 139 4.8.1 白色環的生長機制 ................................................................... 139 第五章 結論與未來展望 .................................................................... 143 5.1 結論 ................................................................................. 143 5.2 未來展望 ............................................................................. 145 參考資料 ................................................................................. 147 | |
dc.language.iso | zh-TW | |
dc.title | 放電加工於純鈦金屬染白研究 | zh_TW |
dc.title | The Study of Pure Titanium Whitening by EDM | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 石昭明,廖運炫,盧銘詮 | |
dc.subject.keyword | 二氧化鈦,白色氧化層,氧化鈦,極性, | zh_TW |
dc.subject.keyword | Titanium Dioxide,White Oxide Layer,Titanium Oxide,Polarity, | en |
dc.relation.page | 153 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2010-08-02 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
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ntu-99-1.pdf 目前未授權公開取用 | 8.87 MB | Adobe PDF |
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