國立中山大學,National Sun Yat-sen University,學位論文,thesis/dissertation,摩擦旋轉攪拌對鎂基多元合金之混成與奈米細晶化研究,none

論文名稱 Title	摩擦旋轉攪拌對鎂基多元合金之混成與奈米細晶化研究 none
系所名稱 Department	材料科學研究所 Institute of Materials Science and Engineering
畢業學年期 Year, semester	93 學年度第 2 學期 The spring semester of Academic Year 93	語文別 Language	中文 Chinese
學位類別 Degree	碩士 Master	頁數 Number of pages	132
研究生 Author	莊家豪 Chia-hao Chuang
指導教授 Advisor	黃志青 J. Chih-Ching Huang(黃志青)
召集委員 Convenor	何扭今 New-Jin Ho(何扭今)
口試委員 Advisory Committee	高伯威 Po-We Kao(高伯威)
口試日期 Date of Exam	2005-07-11	繳交日期 Date of Submission	2005-07-21
關鍵字 Keywords	摩擦旋轉攪拌製程、介金屬化合物、非晶質、鎂合金 hardness, Friction stir processing, magnesium alloy, intermetallic alloys
統計 Statistics	本論文已被瀏覽 5644 次，被下載 2115 次 The thesis/dissertation has been browsed 5644 times, has been downloaded 2115 times.

中文摘要
本論文介紹利用摩擦旋轉攪拌製程應用在薄板的混和，由鎂、鋁、鋅等薄板依照不同比例來產生堅硬的介金屬化合物，並在實驗中尋找是否有非晶質相的發現。添加鋁、鋅合金產生介金屬化合物，經過2道以上摩擦旋轉攪拌製程，可使晶粒細化至1 μm，甚至更小，硬度可維持在200 HV以上，多道數摩擦旋轉攪拌製程技術應用在多元合金上是有明顯的晶粒細化效果。摩擦旋轉攪拌製程中溫度介於350-550 ℃之間，τ
Abstract
The friction stir processing is applied in mixing elemental thin sheets of Mg, Al, and Zn in various portions to result in hard intermetallic alloys with Vicker’s hardness in excess of 350. The Mg3Al2Zn3

目次 Table of Contents
目錄......................................................................................................................................... i 表目錄................................................................................................................................... iv 圖目錄.................................................................................................................................... v 摘要....................................................................................................................................... ix 第一章研究背景及方向.................................................................................................... 1 1.1 鎂合金的發展與應用.................................................................................................. 1 1.2 鎂合金的基本特性...................................................................................................... 2 1.2.1 鎂合金的分類與特性.................................................................................... 2 1.2.2 鎂合金的銲接性質........................................................................................ 4 1.3 摩擦銲接...................................................................................................................... 6 1.4 摩擦旋轉攪拌銲接...................................................................................................... 7 1.4.1 摩擦旋轉攪拌銲接原理與機構.................................................................... 7 1.4.2 摩擦旋轉攪拌銲接特性................................................................................ 9 1.4.3 摩擦旋轉攪拌銲接優劣.............................................................................. 13 1.4.4 摩擦旋轉攪拌銲接之應用.......................................................................... 14 1.5 晶粒細化技術............................................................................................................ 15 1.6 摩擦旋轉攪拌製程.................................................................................................... 16 1.6.1 晶粒細化...................................................................................................... 16 1.6.2 銲道區的超塑性質...................................................................................... 17 1.6.3 金屬基複合材料.......................................................................................... 17 1.6.4 非晶質合金形成能力.................................................................................. 18 1.6.5 固態反應法.................................................................................................. 20 1.7 研究規劃與分析........................................................................................................ 21 第二章實驗方法.............................................................................................................. 23 2.1 實驗材料及處理........................................................................................................ 23 2.2 摩擦旋轉攪拌製程.................................................................................................... 23 2.3 光學顯微鏡之觀察.................................................................................................... 24 2.4 微硬度試驗................................................................................................................ 24 2.5 熱分析........................................................................................................................ 24 2.6 掃瞄式電子顯微鏡之觀察........................................................................................ 24 2.7 X光繞射析................................................................................................................ 25 2.8 穿透式電子顯微鏡之觀察........................................................................................ 25 第三章實驗結果.............................................................................................................. 26 3.1 摩擦旋轉攪拌製程攪拌區外觀與型態.................................................................... 26 3.2 微觀組織觀察............................................................................................................ 27 3.3 X-Ray繞射結果........................................................................................................ 30 3.4 硬度測試.................................................................................................................... 31 3.5 成分分析.................................................................................................................... 34 3.6 TEM結果................................................................................................................... 36 3.7 製程設定及工具頭黏滯問題之改善........................................................................ 37 第四章討論...................................................................................................................... 39 4.1 摩擦旋轉攪拌製程與累積壓延加工之比較............................................................ 39 4.2 玻璃化與非晶質化.................................................................................................... 40 4.3 摩擦旋轉攪拌製程對於多元合金之擴散行為........................................................ 40 4.4 摩擦旋轉攪拌製程之奈米細晶化............................................................................ 41 第五章結論...................................................................................................................... 43 參考文獻.............................................................................................................................. 45 表.......................................................................................................................................... 50 圖.......................................................................................................................................... 63

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