添加鉭顆粒與球狀鈦合金對鎂鋅鈣非晶質合金機械性質影響之研究

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隋孟軒(Meng-Hsuan Sui) 查詢紙本館藏

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機械工程學系

論文名稱

添加鉭顆粒與球狀鈦合金對鎂鋅鈣非晶質合金機械性質影響之研究
(Influences of Ta and Ti-6Al-4V particle Additions on the Mechanical Properties of MgZnCa-Based Amorphous Alloy)

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★ 探討不同結晶率對鋯鋁鈷塊狀非晶質合金機械性質之影響	★ 鈦基非晶填料應用於Ti-6Al-4V合金硬焊之微結構及機械性能研究

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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，原因之一是其能夠在植入後於人體內自行降解，不需藉由二次手術取出，減少病患進出醫院的次數。本研究將選用鎂、鋅、鈣為合金系統主元素，皆為人體內原有之金屬元素，以此製成非晶質合金後，期具有良好的生物相容性，同時，具有和骨骼相近之楊氏係數，可應用於可降解之骨科駐植物。然而，鎂鋅鈣非晶質合金在常溫下呈現脆性、工程性能較弱，因此實際應用於需載重之骨科駐植物上仍有困難尚待克服。本研究選用Mg64Zn31Ca5合金系統為基材，添加微米級鉭顆粒與球狀鈦六鋁四釩顆粒製作出非晶質合金複材。實驗結果顯示，鉭顆粒與基材結合情形較鈦顆粒良好，可有效提升其壓縮破裂強度，基材抗壓強度由890 MPa 提升至941 MPa，相較於添加鈦顆粒的782 MPa為高。但由於兩者皆無法有效阻擋Shear band傳遞所以沒有明顯塑性產生。

摘要(英)

The biodegradable materials can be degraded spontaneously in human body after implanted, hence the secondary surgery is not required. Therefore, biodegradable materials draw lots of attention in the biomedical implant 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 degradable orthopedic implants due to its high bio-compatibility and compatible Young’s Modulus to human bones. However, the brittleness restricts its applications. In this study, Mg64Zn31Ca5 bulk metallic glass (BMG) was utilized as the matrix and enhances the plasticity by adding tantalum particles and spherical Ti-6Al-4V particles into the Mg-based BMG matrix. The results of compression test show both matrixes were strengthened by the dispersion strengthening effect of the particles addition. The fracture strength of Mg64Zn31Ca5 BMGC with Ta particle addition can be increased from 890 MPa to 941 MPa. However, no obvious improvement of plasticity can be obtained for these two Mg-based BMGC alloy systems due to the bad adhesion between the particles and the amorphous matrix.

關鍵字(中)

★ 非晶質合金
★ 裂紋

關鍵字(英)

論文目次

中文摘要 I
英文摘要 II
致謝 III
總目錄 IV
圖目錄 VII
表目錄 X
第一章　前言 1
1-1　緒論 1
1-2　研究動機 3
1-3　研究目的 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 非晶質合金熱力學 10
2-4-1 非晶質是平衡的介穩態 11
2-4-2 玻璃轉換溫度(Tg) 11
2-4-3 簡化玻璃溫度(Trg) 12
2-4-4 過冷液相區大小(ΔTx) 12
2-4-5 γ與γm 13
2-5 非晶質合金製程簡介 14
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 18
2-6-3 超塑性與精密加工 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 23
3-1 試片製作 23
3-1-1 合金基材與複材配製 23
3-1-2　合金基材熔煉 24
3-1-3　合金複材熔煉 25
3-1-4　非晶質合金棒材製作 25
3-1-5 非晶質薄帶製作 27
3-2 微結構觀察與分析 28
3-2-1　X光繞射分析(XRD) 28
3-2-2　掃描式電子顯微鏡(SEM)觀察兼能量散射質譜分析(EDS) 28
3-3　熱性質分析 29
3-4　機械性質分析 30
3-4-1　壓縮測試 30
3-4-2　硬度及破裂韌性測試 30
第四章　結果與討論 32
4-1　顯微組織觀察與分析 32
4-1-1 基材表面觀察與外加顆粒實際含量計算 32
4-1-2 壓縮前試片之SEM觀察與EDS成份分析 34
4-1-3 X光繞射分析 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 36
4-3 機械性質分析 37
4-3-1 硬度測試結果與分析 37
4-3-2 破裂韌性測試結果與分析 38
4-3-3 壓縮測試結果與分析 39
4-3-4 壓縮後試片破斷面之SEM觀察 41
第五章　結論 43
參考文獻 44

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指導教授

鄭憲清

審核日期

2015-7-13

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