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論文名稱 Title |
以奈米壓痕系統探討鎂銅釔金屬玻璃之機械性質 Study of mechanical behavior of metallic glasses Mg-Cu-Y using nano-indenter |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
127 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2008-07-29 |
繳交日期 Date of Submission |
2008-08-07 |
關鍵字 Keywords |
金屬玻璃合金、奈米刮痕、刮痕摩擦力 bulk metallic glasses, friction force, nano-scratch |
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統計 Statistics |
本論文已被瀏覽 5698 次,被下載 26 次 The thesis/dissertation has been browsed 5698 times, has been downloaded 26 times. |
中文摘要 |
本論文主要是利用奈米刮痕量測技術量測金屬玻璃材料的機械性質並且探討刮痕參數條件對刮痕摩擦力和表面破獲形貌之影響。研究參數選擇刮痕負載、刮痕速率、刮痕深度及加工溫度為實驗因子,利用迴歸分析建立金屬玻璃材料的刮痕參數與目標特性的經驗公式,再使用統計軟體分析這四項加工參數對於刮痕摩擦力的影響及顯著性。 研究成果方面,得到刮痕負載與刮痕摩擦力呈現線性比例;另外,當加工溫度昇高時,整體刮痕摩擦力也隨加工溫度上升而增加。而改變刮痕速率、刮痕深度條件時,刮痕摩擦力不隨刮痕速率、刮痕深度而有所變化。奈米刮痕試驗的結果顯示,摩擦係數亦隨著加工溫度、刮痕負載的增加而增加。而回歸分析結果也顯示刮痕負載和加工溫度對刮痕摩擦力影響顯著,再利用統計軟體的迴歸分析,找出重要加工參數與系統之關係,進而建立奈米刮痕系統之數學模式,並能在不同的加工條件下預測刮痕摩擦力。經實驗驗證,本數學模式具有良好的適用性。 |
Abstract |
The mechanical properties of the amorphous bulk metallic glassy (BMG) alloy, Mg58Cu31Y11, are examined by a non-traditional analytic method - nanoindentation scratch test. This thesis will discuss the influences of friction force, and fracture surface geometry on the BMG surface for load, depth of scratch, scratch velocity, and test temperature of the nano-scratch process. In this study, experimental factors, including load, depth of scratch, scratch velocity, and test temperature, are taken into consideration to investigate the effects of the friction force. And then, this research utilizes regression analysis to establish BMG machining experience formula. The significant parameters of the friction force on nano-scratch and the reliability of the prediction model are investigated by statistical software. According to the results, the friction force is nearly proportional to power of the load. The friction force exhibits a slightly dependence on the test temperature. Besides, the nano-scratch results show that the friction coefficient also increases as the load and test temperature increases. The results associated with the analysis of the variance can be practiced to assess the prominence among experimental factors. The analysis indicates that the load, test temperature play significant factors on the friction force. The results of the regression analysis using a statistical software can be applied to model the mathematical relationship between machining factors and friction force. It anticipates that the model is able to predict friction force over a wide variety of scratching conditions. The model is also proved in good agreement with experimental results. |
目次 Table of Contents |
目錄....................................................................................................................I 圖目錄.............................................................................................................IV 表目錄...........................................................................................................VIII 符號說明...........................................................................................................X 中文摘要......................................................................................................XIII 英文摘要.................................................................................................... XIV 第一章 緒論......................................................................................................1 1-1 前言....................................................................................................1 1-2 文獻回顧............................................................................................2 1-3 研究動機與目的................................................................................7 1-4 本文架構…......................................................................................8 第二章 理論分析................................................................9 2-1 前言........................................................................................9 2-2 刮痕模型......................................................................................9 2-2-1最小切屑厚度..........................................................11 2-2-2 單刀刃-力學模式......................................................12 2-2-3抗磨耗特性-刮痕硬度….......................................15 2-2-4臨界負載............................................................16 2-3 迴歸分析..................................................................................17 2-3-1迴歸分析原理........................................................................17 2-3-2線性迴歸模式…....................................................................18 2-3-3迴歸之最小平方法................................................................19 2-3-4迴歸分析流程…....................................................................23 2-4 迴歸分析問題的定義......................................................................24 2-5 非線性迴歸模型建立......................................................................24 2-6 迴歸模型適當性檢驗.....................................................................25 2-7 迴歸模型分析與評估.....................................................................25 2-7-1相關性分析.…....................................................................28 第三章 奈米壓、刮痕試驗理論.....................................................................31 3-1 奈米壓痕試驗..................................................................................31 3-2 奈米刮痕試驗..................................................................................35 3-2-1刮痕原理...................................................................35 3-2-2探針特性.............................................................36 3-2-3奈米刮痕模組.............................................................38 3-3 材料分析儀器之基本原理..............................................................40 3-3-1 掃描式電子顯微鏡..............................................................40 3-3-2原子力掃瞄顯微鏡...............................................................41 第四章 實驗方法與步驟................................................................................43 4-1 實驗流程..........................................................................................43 4-2 實驗設計與目的............................................................................44 4-2-1 實驗材料...................................................................45 4-2-2 試片前處理..................................................................45 4-2-3 刮痕步驟..................................................................46 4-3 實驗分析儀器..................................................................................48 4-3-1 奈米壓痕量測系統...............................................................48 4-3-2 加熱系統平台….............................................................48 4-3-3 研磨拋光機……...............................................................49 4-3-4 光學顯微鏡...........................................................................49 4-3-5 場發射掃描式電子顯微鏡...................................................49 4-3-6 原子力掃瞄顯微鏡............................................................50 第五章 結果與討論........................................................................................55 5-1 刮痕機械性質分析........................................................55 5-1-1刮痕負載對刮痕摩擦力與摩擦係數之影響.......................55 5-1-2刮痕速率對刮痕摩擦力與摩擦係數之影響.......................63 5-1-3刮痕深度對刮痕摩擦力與摩擦係數之影響.......................70 5-1-4加工溫度對刮痕摩擦力與摩擦係數之影響.......................77 5-2 迴歸分析結果.........................................................................84 5-2-1 非線性迴歸模型建立.........................................................84 5-2-2 迴歸模型的檢定...........................................................85 5-2-3 迴歸模型驗證與分析....................................................86 第六章 結論....................................................................................................89 6-1 奈米刮痕結論..................................................................................89 6-1-1奈米刮痕試驗結論.................................................................89 6-2 建議..................................................................................90 參考文獻..........................................................................................................91 |
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