硼碳元素對鐵基非晶質鋼材玻璃形成能力、熱性質及切削性質影響之研究

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蕭安均(An-chun Xiao) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

硼碳元素對鐵基非晶質鋼材玻璃形成能力、熱性質及切削性質影響之研究
(The effect of boron and carbon contents on GFA, thermal properties, and cutting ability of Fe-base bulk amorphous steel (BAS))

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摘要(中)

鐵基非晶質合金又稱於非晶質鋼材(Bulk Amorphous Steel, BAS)，具有優良玻璃形成能力、高強度、高硬度、耐磨耗以及良好耐腐蝕特性，相較於其他金屬玻璃，如鋯基、鈦基等，鐵基非晶質合金擁有更高機械強度且低製備成本，適合應用於生醫工程材料，如手術刀及鑽頭等醫療器械。
　　本研究以Fe-Cr-Mo-C-B-Y-Co為主要成分，配製出不同原子百分比的合金比較其熱性質，以真空吸鑄法製成功製做出2~4 mm的非晶質棒材，其中Fe41Cr15Mo14C12B9Y2Co7玻璃形成能力高達γ=0.399、γm=0.683，過冷液相區範圍擁有81K，適合用於熱壓工程改善品質及熱塑成形。合金硬度約1200 Hv，經由壓縮試驗其破裂強度為3200 MPa。藉由直流電化學動態極化法於Hank’s 緩衝液中研究其腐蝕行為，相較於304及316不鏽鋼，鐵非金質合金具較穩定鈍化層(Epit -Ecorr=1.356 V)，可有效避免表面產生劇烈腐蝕。由鐵基非晶質手合金製作之術刀及鐵基鍍膜手術刀具有比商用手術刀更小之表面粗糙度及更好的銳利度，經切割測試50 cm後，鐵基非晶質手術刀、鐵基非晶質鍍膜手術刀、商用手術刀BSI分別增加為0.38、0.49、0.59，由此驗證出鐵基金屬玻璃手術刀耐磨耗能力佳，經多次切割後仍保有優良的切割能力。

摘要(英)

A prominent Fe-based bulk amorphous steel (BAS) alloy which present high glass forming ability (GFA), good corrosion resistance, superior mechanical properties and relative lower cost. The Fe41Cr15Co7Mo14C21-xBxY2 (x=5-10) BAS rods with a diameter of 2-4 mm, can be fabricate by suction casting method. The highest GFA value can be obtained by adjusting the ration of boron/carbon and reaches to the value of γ=0.399, γm=0.683 at the alloy composition of Fe41Ce15Co7Mo14C12B9Y2. Meanwhile, this alloy also presents very large supercooled liquid region up to 81 K which indicates that it also can be fabricated into the micro-surgery tool by thermoplastic forming. In addition, the hardness of the Fe-based BAS alloy exhibits saturated around 1200 Hv.
The anodic polarization measurement of Fe-based BAS exhibits a higher corrosion resistance than the 304SS and 316SS in Hank’s balanced salt solution. Results of sharpness test reveal that BAS blade exhibits much lower surface roughness and higher wear resistance. The BSI value of Fe-based BAS blade, Fe-based MGTF blade and commercial blade increase from 0.26 to 0.38, 0.29 to 0.49 and 0.31to 0.59 after cutting length 50 cm, respectively.

關鍵字(中)

★ 鐵基非晶質合金
★ 玻璃形成能力
★ 生醫器械

關鍵字(英)

★ Bulk metallic glasses
★ Glass forming ability
★ Blade Sharpness Index

論文目次

中文摘要 I
英文摘要 Abstract II
誌謝 III
目錄 VII
表目錄 XI
圖目錄 XII
第一章緒論 1
第二章理論基礎 7
2-1 非晶質合金發展 7
2-2 實驗歸納法 9
2-3 非晶質合金製備 10
2-4 非晶質合金熱性質（Thermal properties） 13
2-4-1玻璃轉化溫度，Tg 13
2-4-2 結晶溫度，Tx 13
2-4-3 液化溫度，Tl 14
2-4-4 過冷液相區間，∆T 14
2-4-5 玻璃形成能力（Glass forming ability, GFA） 14
2-4-5-1 簡化玻璃轉化溫度，Trg 15
2-4-5-2 γ值和γm值 15
2-5 電化學測試法（Electrochemical tests） 16
2-6刀鋒銳利指數 (Blade Sharpness Index，BSI) 17
2-6-1 計算切割能量，Ei 18
第三章實驗步驟與方法 26
3-1 實驗目的 26
3-2 合金材料製備 27
3-2-1 合金鑄錠配製 27
3-2-2塊狀板材製作 28
3-2-3 合金靶材製作 28
3-2-4 塊狀基材手術刀製作 29
3-2-5靶材製作及非晶質薄膜濺鍍 29
3-3 熱性質分析 30
3-3-1 試片製作處理 30
3-3-2熱示差掃描分析儀（DSC） 30
3-4 微結構分析 31
3-4-1 X光繞射儀與低掠角X光繞射儀分析（XRD and GIXRD） 31
3-4-2 掃描式電子顯微鏡觀察（SEM） 32
3-4-3 電子微探儀（EPMA） 32
3-4-4 原子力顯微鏡（AFM） 33
3-5 電化學－腐蝕性質分析 33
3-5-1 動態極化法 34
3-6 機械性質分析 34
3-6-1 硬度量測分析 34
3-6-2 刮痕測試 35
3-6-3 奈米壓痕硬度量測 35
3-6-4 銳利度測試分析 36
第四章實驗結果與討論 50
4-1 成分分析 50
4-2 晶體構分析 51
4-3 熱性質分析 51
4-3-1 非合溫熱性質分析 51
4-3-2 非恆溫分析法 – Kissinger plot 53
4-3 機械性質分析 54
4-3-1 硬度測試 54
4-3-2 薄膜附著力分析 54
4-3-3 薄膜硬度分析 55
4-4 表面粗糙度分析 56
4-4-1 原子力顯微鏡表面分析(AFM) 56
4-4-2 電子顯微鏡刀刃表面分析 (SEM, Surface profile) 57
4-5 抗蝕能力分析 57
4-5-1動態極化法 57
4-5-2 腐蝕表面觀察 58
4-6 刀鋒表面分析 59
4-7 刀具銳利度磨耗分析 60
第五章結論 89
第六章參考文獻 90

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指導教授

鄭憲清(Shian-ching Jang)

審核日期

2013-7-25

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