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研究生： 周暾煜
Tun-Yu Chou
論文名稱： 等徑轉角擠壓 (ECAP) 製程及添加物對AZ鎂合金儲氫性能之影響
Effect of equal channel angular pressing (ECAP) and additives on hydrogen storage properties of AZ alloy
指導教授： 黃崧任
Song-Jeng Huang
口試委員: 鄭偉鈞
Wei-Chun Cheng
雷添壽
Tien-Shou Lei
丘群
Chun Chiu
學位類別： 碩士
Master
系所名稱： 工程學院 - 機械工程系
Department of Mechanical Engineering
論文出版年： 2016
畢業學年度： 104
語文別： 中文
論文頁數： 204
中文關鍵詞： 鎳 (Ni) 、AZ31鎂基複合材料 (AZ31 MMCs) 、活性碳 (AC) 、AZ鎂合金 、重力鑄造 、等徑轉角擠壓 (ECAP) 、儲氫
外文關鍵詞： AZ31 metal matrix composites (MMCs), nickel (Ni), activated carbon (AC), AZ alloy, gravity casting, equal channel angular pressing (ECAP), hydrogen storage
相關次數： 點閱：279  下載：15 
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    • 　　本研究利用鑄造方式製備AZ31、AZ61鎂合金，經等徑轉角擠壓 (Equal Channel Angular Pressing, ECAP) 製程後，以銼刀取屑進行吸放氫之量測，探討擠壓道次數、加工路徑等工作參數對AZ鎂合金粉末儲氫性能之影響。除了探討ECAP製程參數對儲氫性能之影響，本研究亦探討添加物對AZ鎂合金儲氫性能之影響，選用活性碳 (Activated Carbon, AC) 及鎳粉 (Nickel, Ni) 作為催化劑，不同過往以高能球磨製程添加催化劑之方式，本研究使用重力鑄造方式進行機械攪拌製備鎂基複合儲氫材料，而後以銼刀取屑進行吸放氫之量測。本研究之吸放氫量測皆係以Sievert-type測氫儀進行量測。
    　　研究結果顯示，AZ鎂合金經由ECAP製程產生劇烈之動態再結晶，達至晶粒細化。本研究以AZ31經由BC加工路徑擠壓8道次具有最佳之晶粒細化效果，並提升吸放氫速率，其儲氫量達至7.0 wt.%。而相較於未添加任何添加物之AZ合金，AZ31-5C及AZ31-5C-0.5Ni大幅提升吸放氫速率，儲氫量分別達至6.9 wt.% 及6.3 wt.%。

    　　In this study, the cast AZ31 and AZ61 magnesium alloys were processed by equal channel angular pressing (ECAP) and were comminuted into chips by filing with a rasp to measure the properties of hydrogen storage. Effects of processing pass and route of ECAP on AZ series magnesium alloys hydrogen storage properties were investigated. In addition to studying the effects of ECAP on hydrogen storage properties, we also investigated the effects of additives on hydrogen storage properties by adding activated carbon (AC) and nickel powder (Nip). Different from high energy ball milling technique, the catalysts were added and mixed by gravity cast with mechanical stirring to prepare Mg-based composite materials for hydrogen storage. The materials were further comminuted into chips by filing with a rasp to measure the hydrogen storage properties of AZ metal matrix composites (MMCs). The absorption and desorption of hydrogen were measured by Sievert-type hydrogen measurement system in this research.
    　　These results indicated that after the ECAP processing, the AZ alloys lead to severe dynamic recrystallization and achieved grain refinement. AZ31 processed by ECAP route BC with 8 passes provided the best result of the grain refinement, and elevated the absorption and desorption rate of hydrogen, exhibited high gravimetric hydrogen storage capacity of 7 wt.%. Furthermore, compared to the AZ alloys without any additives, AZ31-5C and AZ31-5C-0.5Ni significantly increased the absorption and desorption rate of hydrogen and the hydrogen storage capacity were 6.9 wt.% and 6.3 wt.%, respectively.

    摘要 I ABSTRACT II 致謝 III 目錄 V 圖目錄 X 表目錄 XVIII 第一章 緒論 1 1.1 前言 1 1.2 文獻回顧 3 1.2.1 本實驗室之鎂基複合材料鑄造製程之簡介 3 1.2.2 鎂鋁合金均質化處理對塑性加工影響之相關文獻 6 1.2.3 等徑轉角擠壓製程應用之相關文獻 9 1.2.4 劇烈塑性變形對材料擴散性質影響之相關文獻 16 1.2.5 鎂基合金於儲氫領域之相關文獻 17 1.3 文獻回顧歸納 30 1.4 研究動機與目的 32 第二章 研究理論基礎 34 2.1 鎂合金之簡介 34 2.1.1 鎂之基本性質 35 2.1.2 鎂合金之特性 36 2.1.3 合金元素對鎂合金之影響 39 2.1.4 鎂合金之鑄造 42 2.1.5 鎂合金之變形機制 45 2.2 ECAP製程簡介 49 2.2.1 ECAP塑性變形原理 50 2.2.2 ECAP加工路徑 53 2.2.3 ECAP晶粒細化原理 56 2.3 氫之介紹 58 2.3.1 氫之基本性質 58 2.3.2 氫之安全性與觀念認知 60 2.3.3 氫與其他燃料之比較 61 2.4 氫之儲存技術 63 2.4.1 高壓儲氫 65 2.4.2 低溫液化儲氫 67 2.4.3 物理吸附儲氫 68 2.4.4 金屬氫化物儲氫 69 2.5 材料之擴散反應 71 2.6 儲氫合金 73 2.6.1 儲氫合金動力學性質 76 2.6.2 儲氫合金熱力學性質 78 2.6.3 鎂基儲氫合金儲氫性能之改善 80 2.7 活性碳 82 2.8 Sievert-type儲氫之量測原理 84 第三章　實驗方法與步驟 87 3.1 實驗材料 89 3.2 實驗設備 91 3.2.1 鑄造用熔煉爐 91 3.2.2 熱處理高溫爐 94 3.2.3 等徑轉角擠壓試驗機 94 3.2.4 濕式自動研磨機及拋光機 96 3.2.5 光學顯微鏡 97 3.2.6 微型維克氏硬度試驗機 97 3.2.7 掃描式電子顯微鏡 98 3.2.8 X光繞射分析儀 99 3.2.9 Sievert-type儲氫量測設備 100 3.3 鎂基合金材料熔煉及ECAP試棒製備步驟 101 3.4 ECAP製程步驟及試片規劃 102 3.5 合金切屑粉末製備 104 3.6 鎂基儲氫合金儲氫性質檢測 105 3.6.1 活化 105 3.6.2 動力學曲線 106 第四章　結果與討論 107 4.1 AZ鎂合金經ECAP製程前後之微觀分析 107 4.1.1 鑄態之微觀分析及均質化處理對鑄件之影響 107 4.1.2 ECAP製程前測試 113 4.1.3 ECAP製程後之宏觀及微觀分析 117 4.1.4 平均之晶粒尺寸分析 131 4.1.5 小結論 135 4.2 AZ鎂合金之儲氫性質分析 136 4.2.1 AZ鎂合金切屑粉末之表面形貌分析 136 4.2.2 AZ鎂合金切屑粉末進行活化及吸放氫之量測 139 4.2.3 ECAP擠壓道次對儲氫性質之影響 149 4.2.4 ECAP加工路徑對儲氫性質之影響 152 4.2.5 AZ鎂基合金之鋁含量對儲氫性質之影響 153 4.2.6 小結論 155 4.3 AZ鎂基複合儲氫材料之儲氫性質分析 157 4.3.1 AZ鎂基複合儲氫材料鑄態之微觀分析 157 4.3.2 AZ鎂基複合儲氫切屑粉末之表面形貌分析 163 4.3.3 AZ鎂基複合儲氫切屑粉末之儲氫性質量測 166 4.3.4 添加物對AZ鎂基複合儲氫材料之影響 168 4.3.5 小結論 173 第五章　結論 174 第六章　未來研究方向 176 參考文獻 177

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