博碩士論文 943203004 詳細資訊




以作者查詢圖書館館藏 以作者查詢臺灣博碩士 以作者查詢全國書目 勘誤回報 、線上人數:18 、訪客IP:18.191.165.192
姓名 吳俊霖(Chun-Lin Wu)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 碳奈米管應用於放電加工電極材料之研究
(Investigation the EDM Behaviour of arbon Nanotubefor Electrode Material)
相關論文
★ 凹形球面微電極與異形微孔的成形技術研究★ 二氧化鈦薄膜之製備與分析
★ 固態氧化物燃料電池連接板電漿鍍膜特性研究★ 碳奈米管微電極陣列之製造與性質檢測
★ 超塑性5083鋁合金快速成形空孔狀態之分析★ 微極彈性內凹結構波桑比之有限元素法分析
★ 不銹鋼微細槽放電加工及電化學拋光精修槽壁效果之研究★ 壓力容器與引流管接合處之軸對稱有限元素分析
★ 負波桑比結構之桁架有限元素法分析★ 具負波桑比性質之細胞型材料之有限元素法分析
★ 具負波桑比傘狀結構之分析與應用★ Ti-6Al-4V之超塑性成形製程模擬與分析
★ 利用微極彈性理論分析蜂巢式結構之波桑比效應★ 結合微細放電與高頻抖動研磨之微孔加工研究
★ 負波桑比機構之設計與分析★ 微雙材料熱變形樑之應用分析
檔案 [Endnote RIS 格式]    [Bibtex 格式]    [相關文章]   [文章引用]   [完整記錄]   [館藏目錄]   [檢視]  [下載]
  1. 本電子論文使用權限為同意立即開放。
  2. 已達開放權限電子全文僅授權使用者為學術研究之目的,進行個人非營利性質之檢索、閱讀、列印。
  3. 請遵守中華民國著作權法之相關規定,切勿任意重製、散佈、改作、轉貼、播送,以免觸法。

摘要(中) 現今應用在放電加工(Electric Discharge Machine, EDM)的電極大都採用銅以及銅合金,主要是因為銅具備優良的電極條件,但銅的熔點只有一千多度,並不適合應用於大能量放電加工。本研究主題是探討一種以碳奈米管(Carbon Nanotube, CNT)與銅微粒製成之CNT/Cu複合電極的放電行為。其研究動乃是利用碳奈米管增加銅電極的熱傳導[1-2]以及放電能量,以改善銅在高能量放電時的之不足,使其成為具有高材料移除率(Material Removal Rate, MRR)以及低電極消耗率(Electrode Wear Rate, EWR)的優良電極材料。本研究使用碳奈米管為增強材料,其為多壁碳奈米管(Multi-Walled Carbon Nanotube, MWCNT),直徑為20~40 nm、長度為5~15 μm,添加量分別為重量百分比等於0、0.5、1.0、3.0 wt %,而基材使用銅粉,其粒徑尺寸大小大約為40~50μm。二者使用熱壓燒結結合,其燒結條件溫度為1050℃、壓力為16 MPa、真空度保持在10-2 Torr、時間持續1小時,試件外觀為圓餅狀電極材料,再以銑床及線切割機進行機械加工成長條狀,以不同的放電參數進行放電加工,包括脈衝時間、峰值電流、碳奈米管添加量、放電波形以及表面粗糙度(Surface Roughness, SR)的探討。
由實驗測得知在脈衝時間為100 μs時有較佳之MRR,另外在峰值電流為8 A時,探討有添加與無添加碳奈米管的電極之差異發現:在電流8 A以下時,添加CNT電極與銅電極之EWR有降低現象但MRR相差不多;而在8 A以上時,EWR反而升高MRR也亦相對的增高,而當3.0 wt %之電極在電流18 A時可達到增33 % MRR之改善率。
摘要(英) Copper and its compounds such as Cu-W alloy are the most common electrode materials in application of electrical discharge machining (EDM). However, due to its intrinsic modest melting temperature and high coefficient of thermal expansion which result in low working efficiency, it is not suitable for high current (>100Amp) and high material removal rate (MRR) EDM condition.
An innovative electrode material was fabricated by adding different amount of Multi-Walled Carbon Nanotube (MWCNT) into copper matrix to enhance its material removal rate and durability in view of carbon nanotube’s remarkable properties such as high thermal conductivity and electrical conductivity. The purpose of this master thesis is to investigate the electrical discharge machining behaviors by this new type of electrode material.
In this approach, the nano-size (diameter:20~40 nm; length:5~15 μm) MWCNT with 0.5, 1.0, 3.0 wt % were mixed with copper powder (40~50 μm). After well dispersed by shaking/ball-milling process, the mixture was poured into the graphite die and underwent 16 MPa pressure to hot press for 1050℃and 60 min under 10-2 Torr vacuum condition. The hot-pressed disk-shape Cu/MWCNT composite was then machined into rectangle by mill and WEDM to serve as electrode for investigating the EDM behavior. The effect of EDM parameters such as pulse duration (Ton), discharging current (Ip) and the improvement of material removal rate (MRR) were analyzed.
From the experimental results, the highest MRR with Cu/MWCNT electrode was achieved by using 100 μs pulse duration. To compare with electrode wear rate (EWR) between pure copper and Cu/MWCNT electrodes, it was found that all three compositions of Cu/MWCNT electrodes have lower EWR when the Ip is below 8 A. On the other hand, copper composite with
3.0 wt % MWCNT has the best MRR up to 33 % by using the Ip at 18 A.
關鍵字(中) ★ CNT/Cu複合電極
★ 碳奈米管
★ 多壁碳奈米管
關鍵字(英) ★ Multi-Walled Carbon Nanotube (MWCNT)
★ Electrical Discharge Machining (EDM)
★ Cu/MWCNT composite
論文目次 摘 要 i
圖目錄 vii
表目錄 ix
表目錄 ix
第一章 緒論 1
1-1 研究動機與目的 1
1-2 研究方法 2
第二章 碳奈米管之簡介 4
2-1 碳奈米管之發現 4
2-3 碳奈米管之特性 8
2-4 碳奈米管的生長機制與合成方法 11
2-5 碳奈米管的應用 17
第三章 實驗原理 20
3-1 放電加工基本原理 20
3-2 放電加工材料去除機制 22
3-3 放電加工參數設定及其影響 25
3-4 無電鍍(Electroless Plating)原理 29
3-5 混合定律(Rule of Mixture) 31
第四章 實驗設備與方法 32
4-1 實驗設備 32
4-3 實驗前置準備 44
4-3 實驗方法 46
4-3-1 無電鍍銅 47
4-3-2 放電加工參數設定 47
第五章 結果與討論 49
5-1 製備CNT/Cu複合電極材料之探討 49
5-2 放電加工之參數探討 53
5-2-1 脈衝時間對材料移除率及電極消耗率之影響 53
5-2-2 峰值電流對材料移除率及電極消耗率之影響 56
5-3 碳奈米管添加量對材料去除率及電極消耗率之影響 62
5-4 放電波形探討 66
5-5 碳奈米管添加量對表面粗糙度的影響 68
第六章 結 論 70
參考文獻 71
個人簡歷 74
參考文獻 [1] Lim, B., Kim, C. J., Kim, B., Shim, U., Oh, S., Sung, B. O., Choi, J. H.,
Baik, S., “The Effects of Interfacial Bonding on Mechanical Properties of
Single-Walled Carbon Nanotube Reinforced Copper Matrix
Nanocomposites,” Nanotechnology, Vol.17, pp.5759-5764, 2006.
[2].Yu, A., Ltkis, M. E., Bekyarova, E., and Haddon, R. C., “Effect of
Single-Walled Carbon Nanotube Purity on the Thermal Conductivity of Carbon Nanotube-Based Composites,” Applied Physic Letters, Vol.89.
[3].Iijima, S., “Helical Microtubules of Graphitic Carbon,” Nature, Vol.354,
1991.
[4].Lau, K. T., Shi, S. Q., Cheng, H. M., “Micro-Mechanical Properties and
Morphological Observation on Fracture Surfaces of Carbon Nanotube
Composites Pre-Treated at Different Temperatures,” Composites Science and Technology, Vol.63, pp.1161–1164, 2003.
[5].Rajoria, H., Jalili, N., “Passive Vibration Damping Enhancement Using
Carbon Nanotube-Epoxy Reinforced Composites,” Composites Science and Technology, Vol.65, pp. 2079–2093, 2005.
[6].Avouris, P., “Carbon Nanotube Electronics”, Chemical Physics, Vol.281, pp.429–445, 2002.
[7].Yang, D.J., Wang, S.G., Zhang, Q., Sellin, P.J., Chen, G., “Thermal and
Electrical Transport in Multi-Walled Carbon Nanotubes,” Physics Letters A, Vol.329, pp. 207-213, 2004.
[8].Chen, B. X., Zhang, G., Chen, C., Zhou, L., Li, S., Li, X., “Carbon Nanotube
Composite Deposits with High Hardness and High Wear Resistance”, Advanced Engineering Materials, Vol.5, No.7, 2005.
[9].Kim, K. T., Cha, S. I., Hong, S. H., Hong, S. H., “Microstructures and
Tensile Behavior of Carbon Nanotube Reinforced Cu Matrix
Nanocomposites,” Materials Science and Engineering A, Vol.430, pp. 27-33, 2006.
[10].Kim, I.S., Lee, S.K., “Fabrication of Carbon Nanofiber/Cu Composite Electroless Plating and Microstructural during Thermal Exposure,” Scripta Materialia, Vol. 52, pp. 1045-1049, 2005.
[11].蘇鐘正,“利用電腦繪圖將催化劑印於基板上致無電鍍銅成電路之研究”,中原大學碩士論文,2002。
[12].Woodman, R.H., Klotz, B.R., Dowding, R.J., “Evaluation of a Dry
Ball-Milling Technique as A Method for Mixing Boron Carbide and Carbon Nanotube Powders,” Ceramics International.,Vol. 31, pp.765-768, 2005.
[13].陳建良,“結合微細放電與高頻抖動研磨之微孔加工研究”,國立中央大
學碩士論文,2003。
[14].國家高速網路與計算中心網頁圖片,網頁網址
http://nano.nchc.org.tw/dictionary/c60.htm
[15].蘇清源,“碳奈米管控制成長之方法研究”,國立中央大學碩士論文,2005。
[16].何萬清,“熱化學氣相沉積法製備橫向碳奈米管之研究”,國立中央大學
碩士論文,2005。
[17].Baker, R.T.K., Waite, R.J., “Nucleation and Growth of Carbon Deposits from The Nickel Catalyzed Decomposition of Acetylene,” Journal of catalysis, Vol.26, No.51, 1972.
[18].陳紹良,“以微波化學氣相沉積法成長碳奈米管之研究”,國立中央大學,
2003。
指導教授 黃豐元(Fuang-Yuan Huang) 審核日期 2007-7-3
推文 facebook   plurk   twitter   funp   google   live   udn   HD   myshare   reddit   netvibes   friend   youpush   delicious   baidu   
網路書籤 Google bookmarks   del.icio.us   hemidemi   myshare   

若有論文相關問題,請聯絡國立中央大學圖書館推廣服務組 TEL:(03)422-7151轉57407,或E-mail聯絡  - 隱私權政策聲明