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姓名 吳哲瑋(Che-Wei Wu) 查詢紙本館藏 畢業系所 材料科學與工程研究所 論文名稱 鐵顆粒添加對鎂鋅鈣非晶質合金熱性質及機械性質影響之研究
(The Influence of Iron-particles Addition on Thermal and Mechanical Properties of Mg-based Amorphous Alloy)相關論文 檔案 [Endnote RIS 格式]
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摘要(中) 近年來，生物可降解材料在醫學界備受矚目，原因是其能夠在生物體內自行分解，不需藉由二次手術取出，有效降低術後感染的風險。鎂、鋅、鈣為人體內含量極高之金屬元素，形成非晶質合金後，不但具有良好的生物相容性，同時具有和骨骼相近之楊氏係數，在骨科駐植物的應用上相當具有潛力。然而，鎂鋅鈣非晶質合金在常溫下呈現出嚴重脆性，因此實際應用上仍有困難尚待克服。本實驗首先針對MgxZn95-xCa5 (x = 65-67)合金系統進行最佳玻璃形成能力探討，發現Mg66Zn29Ca5具有相對較佳的玻璃形成能力，接著利用Mg66Zn29Ca5為基材，添加等軸鐵顆粒製作出非晶質合金複材。實驗結果顯示，鐵顆粒具有良好的散佈強化效果，可有效提升其壓縮破裂強度，基材抗壓強度由394 MPa提升至650 MPa，但由於鐵顆粒與基材介面契合度不佳緣故，塑性變形量並無明顯提升。 摘要(英) The biodegradable materials can be dissolved spontaneously in human body, hence the secondary surgery is not required and many infections can be avoided. Therefore, biodegradable materials have attracted great attention in the field of medical research. Magnesium, Zinc and Calcium are elements with high content in human body. The Mg-Zn-Ca amorphous alloy has become a potential candidate of orthopedic implants due to its high bio-compatibility and low Young’s Modulus that is quite close to human bones. However, it still has many restrictions on applications because of its inherit brittleness. The glass forming ability (GFA) of MgxZn95-xCa5 (x = 65-67) alloying system was evaluated in the beginning of this study, and the result reveals that the Mg66Zn29Ca5 has the highest value of GFA in this alloy system. Therefore, the composition of Mg66Zn29Ca5 was utilized as the matrix to fabricate Mg-based BMGC with equiaxial iron particles addition. The result of compression test also shows the dispersion strengthening effect of the iron particles on increasing the fracture strength of the Mg-based BMG. The fracture strength of Mg66Zn29Ca5-based BMGC can be increased from 394 MPa to 650 MPa. However, no obvious improvement of plasticity can be obtained for this Mg-based BMGC due to the bad adhesion between the iron particles and the amorphous matrix. 關鍵字(中) ★ 生物降解
★ 生物相容性
★ 非晶質合金
★ 骨科駐植物
★ 裂紋關鍵字(英) ★ biodegradable
★ biocompatibility
★ orthopedic implants
★ bulk metallic glass composites (BMGCs)
★ crack論文目次 中文摘要................................................................................................................I
英文摘要..............................................................................................................II
總目錄.................................................................................................................III
圖目錄................................................................................................................VII
表目錄.................................................................................................................XI
第一章 前言.......................................................................................................1
1-1 緒論..........................................................................................................1
1-2 研究動機與目的......................................................................................3
第二章 理論基礎...............................................................................................5
2-1 非晶質合金概述......................................................................................5
2-2 非晶質合金的發展歷程..........................................................................6
2-3 實驗歸納法則..........................................................................................9
2-4 非晶質合金製程簡介............................................................................10
2-5 非晶質合金熱力學................................................................................13
2-5-1 非晶質是平衡的介穩態................................................................13
2-5-2 玻璃轉換溫度(Tg)..........................................................................14
2-5-3 簡化玻璃溫度(Trg).........................................................................15
2-5-4 過冷液相區大小(ΔTx)...................................................................16
2-5-5 γ與γm..............................................................................................16
2-6 非晶質合金之特性................................................................................17
2-6-1 機械性質........................................................................................18
2-6-2 抗蝕性與抗菌性............................................................................19
2-6-3 磁性質............................................................................................19
2-7 非晶質合金的變形機制........................................................................20
2-8 外加金屬顆粒選擇法則........................................................................21
第三章 實驗步驟.............................................................................................22
3-1 試片製作................................................................................................22
3-1-1 合金基材與複材配製....................................................................22
3-1-2 合金基材熔煉................................................................................23
3-1-3 合金複材熔煉................................................................................24
3-1-4 非晶質合金棒材製作....................................................................24
3-1-5 非晶質薄帶製作............................................................................25
3-2 微結構觀察與分析................................................................................26
3-2-1 X光繞射分析(XRD)......................................................................26
3-2-2 掃描式電子顯微鏡(SEM)觀察兼能量散射質譜分析(EDS).......26
3-3 機械性質分析........................................................................................27
3-3-1 壓縮測試........................................................................................27
3-3-2 硬度及破裂韌性測試....................................................................28
3-4 熱性質分析............................................................................................29
第四章 結果與討論.........................................................................................31
4-1 顯微組織觀察與分析............................................................................31
4-1-1 基材析出相與外加顆粒實際含量計算........................................31
4-1-2 X光繞射分析.................................................................................32
4-1-3 壓縮前試片之SEM觀察與EDS成份分析...................................33
4-1-4 壓縮後試片破斷面之SEM觀察...................................................34
4-2 熱性質分析............................................................................................35
4-2-1 基材非恆溫熱性質分析................................................................35
4-2-2 複材非恆溫熱性質分析................................................................37
4-3 機械性質分析........................................................................................37
4-3-1 壓縮測試結果與分析....................................................................37
4-3-2 硬度與破裂韌性測試結果與分析................................................40
4-3-3 結晶相比例與機械性質之關係....................................................42
第五章 結論...................................................................................................43
參考文獻.............................................................................................................44
圖 2-1 結晶材料與非晶材料X-ray繞射比較圖.............................................49
圖 2-2 雙輪連續急冷法示意圖.......................................................................49
圖 2-3 激冷熔液旋噴法示意圖.......................................................................50
圖 2-4 平面流鑄法示意圖...............................................................................50
圖 2-5 熔融金屬液急冷之比體積對溫度變化曲線.......................................51
圖 2-6 臨界冷卻速率與玻璃形成能力關係圖...............................................51
圖 2-7 結晶與非晶質不鏽鋼材料抵抗腐蝕示意圖.......................................52
圖 2-8 低溫剪切轉變區示意圖.......................................................................52
圖 3-1 實驗流程示意圖...................................................................................53
圖 3-2 實驗原料外觀.......................................................................................53
圖 3-3 高週波熔煉感應爐外觀.......................................................................54
圖 3-4 高週波熔煉感應噴鑄爐外觀...............................................................54
圖 3-5 鎂鋅鈣非晶質合金棒材.......................................................................55
圖 3-6 高週波熔煉感應爐(附銅輪)外觀.........................................................55
圖 3-7 慢速切割機...........................................................................................56
圖 3-8 圓柱型標準試片(h:d = 2:1)..................................................................56
圖 3-9 X光繞射儀外觀....................................................................................57
圖 3-10 超高真空場發射掃描式電子顯微鏡外觀...........................................57
圖 3-11 穿透式電子顯微鏡外觀.......................................................................58
圖 3-12 雙束型聚焦離子束顯微鏡外觀...........................................................58
圖 3-13 萬能材料試驗機外觀...........................................................................59
圖 3-14 維克氏硬度計外觀...............................................................................59
圖 3-15 壓痕裂縫示意圖...................................................................................60
圖 3-16 示差掃描熱分析儀外觀.......................................................................60
圖 4-1 MgxZn95-xCa5 (x = 65.1-67.4)非晶質合金基材XRD繞射圖..............61
圖 4-2 MgxZn95-xCa5 (x = 67.7-69.6)非晶質合金基材XRD繞射圖..............61
圖 4-3 Mg66Zn29Ca5參雜Fe顆粒非晶質合金複材繞射圖............................62
圖 4-4 Mg66Zn29Ca5非晶質合金基材表面形貌..............................................62
圖 4-5 Mg67.7Zn27.3Ca5非晶質合金基材表面形貌及其析出相 (a) 500x (b)
1000x (c) 3000x (d) 5000x..................................................................................64
圖 4-6 Mg66Zn29Ca5 / 10 vol.% Fe非晶質合金複材表面形貌.......................65
圖 4-7 Mg66Zn29Ca5 / 10 vol.% Fe非晶質合金複材表面之鐵粉與介面 (a)
1000x (b) 2000x..................................................................................................66
圖 4-8 Mg66Zn29Ca5非晶質合金基材壓縮後試片情形..................................66
圖 4-9 Mg66Zn29Ca5非晶質合金基材破斷面觀察 (a) 100x (b) 500x (c) 1000x
(d) 3000x.............................................................................................................68
圖 4-10 Mg66Zn29Ca5 / 10 vol.% Fe非晶質合金複材壓縮後試片情形...........69
圖 4-11 Mg66Zn29Ca5 / 10 vol.% Fe非晶質合金複材破斷面觀察 (a) 1000x (b)
3000x (c) 5000x (d) 10000x................................................................................71
圖 4-12 Mg66Zn29Ca5 / 10 vol.% Fe非晶質合金複材壓縮後鐵顆粒與介面情
形 (a) 1000x (b) 3000x (c) 5000x.......................................................................72
圖 4-13 (a) MgxZn95-xCa5 (x = 65.1-67.4)非晶質合金基材之非恆溫DSC曲線圖 (b) 過冷液相區局部放大圖........................................................................73
圖 4-14 (a) MgxZn95-xCa5 (x = 67.7-69.6)非晶質合金基材之非恆溫DSC曲線圖 (b) 過冷液相區局部放大圖........................................................................74
圖 4-15 Mg含量與γm值變化趨勢圖...............................................................75
圖 4-16 Mg含量與ΔTx值變化趨勢圖............................................................75
圖 4-17 Mg66Zn29Ca5 / x vol.% Fe (x = 0, 5, 10)非晶質合金複材之非恆溫DSC曲線圖.................................................................................................................76
圖 4-18 MgxZn95-xCa5 (a) x = 65.1-67.4 (b) x = 67.7-69.6非晶質合金基材之壓縮曲線.................................................................................................................77
圖 4-19 Mg66Zn29Ca5 / x vol.% Fe (x = 0-10) 非晶質合金複材之壓縮曲線...78
圖 4-20 Mg66Zn29Ca5非晶質合金基材硬度測試壓痕形貌 (a) 300x
(b) 500x...............................................................................................................79
圖 4-21 Mg66Zn29Ca5 / 10 vol.% Fe非晶質合金複材硬度測試壓痕形貌
(a) 300x (b) 500x.................................................................................................80
圖 4-22 析出相比例與抗壓強度關係圖...........................................................80
圖 4-23 析出相比例與破裂韌性關係圖...........................................................81
表 2-1 非晶質合金之特性及其應用領域.......................................................82
表 2-2 晶質合金與非晶質合金破壞強度比較...............................................82
表 4-1 MgxZn95-xCa5 (x = 65.1-69.6)基材內部析出相所占體積分率............83
表 4-2 Mg66Zn29Ca5 / x vol.% Fe (x = 5, 10)非晶質合金複材內部鐵粉實際含量.........................................................................................................................83
表 4-3 Mg95-xZnxCa5 (x = 28~30)假設成份與實際成份對照表......................84
表 4-4 Mg66Zn29Ca5 + Fe粉假設成份與實際成份對照表..............................84
表 4-5 MgxZn95-xCa5 (x = 65.1-69.6)基材真實熱性質列表.............................85
表 4-6 Mg66Zn29Ca5 / x vol.% Fe (x = 0, 5, 10)複材真實熱性質列表............85
表 4-7 Mg66Zn29Ca5 / x vol.% Fe (x = 0, 5, 10)非晶質合金複材壓縮性質....86
表 4-8 Mg66Zn29Ca5 / x vol.% Fe (x = 0, 5, 10)非晶質合金複材硬度與破裂韌
性值.....................................................................................................................87
表 4-9 MgxZn95-xCa5 (x = 65.1-69.6)基材之塑性區大小................................88
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指導教授 鄭憲清(Shian-Ching Jang) 審核日期 2014-7-22 推文 plurk
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