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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李岳聯 | zh_TW |
dc.contributor.advisor | Yueh-Lien Lee | en |
dc.contributor.author | 鄭君虎 | zh_TW |
dc.contributor.author | Chun-Hu Cheng | en |
dc.date.accessioned | 2024-05-15T16:06:49Z | - |
dc.date.available | 2024-05-16 | - |
dc.date.copyright | 2024-05-15 | - |
dc.date.issued | 2024 | - |
dc.date.submitted | 2024-05-12 | - |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/92632 | - |
dc.description.abstract | 鎂合金與其他金屬相比具有相對較低的密度、優良的比強度和可回收性等優點,然而由於較低的硬度使鎂合金的耐磨耗性能較差,在工業應用上經常受到限制,因此必須進行適當的處理以提升表面的抗磨耗能力。
微弧氧化是近年來備受關注的一種表面改質技術,其塗層具有高硬度、耐磨耗和與基材附著性高等優點,但同時微弧氧化塗層表面的高粗糙度以及多孔性質嚴重影響了其耐磨耗性能,因此本研究藉由在矽酸鹽基溶液中添加不同濃度硼酸(2 g/L, 5 g/L),以試圖改善微弧氧化塗層的緻密性及摩擦性能,提升其抗磨耗能力。 實驗結果表明,在基礎製程溶液中添加2 g/L的硼酸能使其塗層結構更為緻密並有助於耐磨耗性能提升,但當硼酸濃度增加至5 g/L時,由於放電現象的增強使得塗層孔隙率增加,導致塗層在較重負載下的耐磨耗性能顯著下降。通過在濃度5 g/L硼酸溶液中額外添加1.5 g/L的氫氧化鈉使溶液導電度下降,藉此降低製程中的擊穿電壓,成功使塗層孔隙率降低並且其塗層在所有試樣中表現出最好得耐磨耗性能。 | zh_TW |
dc.description.abstract | Magnesium alloys compared to other metals have several advantages such as lower density, excellent specific strength, and recyclability. However, their industrial application is often limited due to their relatively low hardness and poor wear resistance. Therefore, appropriate surface treatments are necessary to enhance their performance.
Micro-arc oxidation (MAO) is a surface modification technique that has gained significant attention in recent years. It offers benefits like high hardness, wear resistance, and excellent adhesion to the substrate. However, the high roughness and porosity of the micro-arc oxidized coating severely affect its wear resistance. In this study, different concentrations of boric acid (2 g/L, 5 g/L) were added to a silicate-based solution to improve the density and tribological properties of the coating. The experimental results indicated that adding 2 g/L of boric acid to the base process solution resulted in a denser coating structure, which contributed to enhanced wear resistance. However, increasing the boric acid concentration to 5 g/L led to an increased porosity due to intensified discharge phenomena, significantly reducing the wear resistance under heavier loads. By adding an additional 1.5 g/L of sodium hydroxide to the 5 g/L boric acid solution, the conductivity of the solution was reduced. As a result, this approach decreased the breakdown voltage during the process, effectively lowering the coating''s porosity. This led to a significant improvement in wear resistance, outperforming all other samples in the study. | en |
dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-05-15T16:06:48Z No. of bitstreams: 0 | en |
dc.description.provenance | Made available in DSpace on 2024-05-15T16:06:49Z (GMT). No. of bitstreams: 0 | en |
dc.description.tableofcontents | 致謝 ii
摘要 iii Abstract iv 目次 v 圖次 vii 表次 x 第一章 前言 1 第二章 論文回顧 3 2.1 鎂與鎂合金 3 2.1.1 鎂 3 2.1.2 鎂鋁合金 5 2.1.3 鎂鋅合金 6 2.2 磨耗 7 2.2.1 磨耗介紹 7 2.2.2 磨耗機制 8 2.3 鎂合金的表面處理技術 15 2.3.1 電鍍 (Electroplating) 15 2.3.2 物理氣相沉積法 (Physical vapor deposition) 15 2.3.3 噴塗技術 (Thermal spray) 16 2.3.4 微弧氧化 (Micro-arc oxidation) 16 2.4 微弧氧化 17 2.4.1 微弧氧化發展歷史及原理 17 2.4.2 微弧氧化塗層結構 23 2.4.3 電性參數和電源型式對微弧氧化塗層結構的影響 24 2.4.4 電解液對微弧氧化塗層結構的影響 27 2.4.5 微弧氧化塗層的抗磨耗性質 30 第三章 實驗流程與方法 34 3.1 實驗流程 34 3.2 試片製備 36 3.3 微弧氧化 37 3.3.1 微弧氧化設備 37 3.3.2 電性參數 38 3.3.3 電解液配置 39 3.4 結構分析 41 3.4.1 掃描式電子顯微鏡(Scanning Electron Microscope , SEM ) 41 3.4.2 雷射共軛焦顯微鏡(Laser Scanning Confocal Microscopy) 41 3.4.3 硬度分析 43 3.5 成份分析 43 3.5.1 X射線光電子能譜圖分析(X-ray photoelectron spectroscopy) 43 3.5.2 X光繞射分析(X-ray diffraction analysis,XRD) 44 3.6 磨耗測試 45 3.6.1 Pin-on-disk磨耗試驗機 45 3.6.2 白光干涉儀(White light Interferometers) 47 第四章 實驗結果 49 4.1 電壓-時間關係圖 49 4.2 表面粗糙度分析 50 4.3 硬度分析 51 4.4 塗層微結構 52 4.5 XRD分析 55 4.6 XPS分析 56 4.7 磨耗試驗分析 61 第五章 討論 67 5.1 塗層微結構 67 5.1.1 硼酸添加對於塗層結構的正面影響 67 5.1.2 硼酸添加對於塗層結構的負面影響 68 5.1.3 5B35N塗層微結構 68 5.2 塗層摩擦性能 69 5.3 塗層之抗磨耗能力 70 第六章 結論 71 第七章 未來工作 72 參考文獻 73 | - |
dc.language.iso | zh_TW | - |
dc.title | 硼酸濃度對AZ31鎂合金微弧氧化塗層抗磨耗性能之影響 | zh_TW |
dc.title | Effect of boric acid concentration on the wear resistance of micro-arc oxidation coatings on AZ31 magnesium alloy | en |
dc.type | Thesis | - |
dc.date.schoolyear | 112-2 | - |
dc.description.degree | 碩士 | - |
dc.contributor.oralexamcommittee | 楊舜涵;簡順億;鍾仁傑 | zh_TW |
dc.contributor.oralexamcommittee | Shun-Han Yang;Shun-Yi Jian;Ren-Jei Chung | en |
dc.subject.keyword | 鎂合金,硼酸,微弧氧化,磨耗性能, | zh_TW |
dc.subject.keyword | Magnesium alloy,Macro-arc oxidation,Boric acid,Wear resistance, | en |
dc.relation.page | 79 | - |
dc.identifier.doi | 10.6342/NTU202400955 | - |
dc.rights.note | 同意授權(全球公開) | - |
dc.date.accepted | 2024-05-13 | - |
dc.contributor.author-college | 工學院 | - |
dc.contributor.author-dept | 工程科學及海洋工程學系 | - |
顯示於系所單位: | 工程科學及海洋工程學系 |
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