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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李岳聯 | zh_TW |
| dc.contributor.advisor | Yueh-Lien Lee | en |
| dc.contributor.author | 許鵬曙 | zh_TW |
| dc.contributor.author | Peng-Shu Hsu | en |
| dc.date.accessioned | 2023-10-24T17:03:11Z | - |
| dc.date.available | 2025-09-01 | - |
| dc.date.copyright | 2023-10-24 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2023-08-12 | - |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91087 | - |
| dc.description.abstract | 本研究以雙脈衝電源於 AZ31 鎂合金表面進行微弧氧化製程，探討添加鎢酸鈉在矽酸鹽系統微弧氧化製程中對氧化層成膜機制的影響，並透過圓盤球式磨耗試驗機進行乾燥狀態下的抗磨耗能力比較。
實驗結果顯示，鎢酸鈉的添加超過5g/L時會使 AZ31 微弧氧化膜在矽酸鹽製程中出現兩個階段的成長行為。第一階段透過相對低熔點相MgWO4的併入束縛電漿化的氣體，進而吸引貫穿形式的B-type放電造成微弧氧化層的不均勻生長。第二階段則轉為孔洞內放電使膜層緻密並均勻增厚。適當的鎢酸鈉添加量能透過此二階段成長使微弧氧化膜表面富含較多高硬度之Mg2SiO4，進而擁有較好的抗磨耗能力，過多的添加量則會導致第一階段的膜層因強放電發生崩解，造成最終膜層厚度不均使抗磨耗能力劣化。 | zh_TW |
| dc.description.abstract | The micro-arc oxidation using a bipolar power supply was carried out and coated on AZ31 magnesium alloy. This study discussed the change of coatings' growth mechanism by adding sodium tungstate in a silicate-based electrolyte system. Meanwhile, the ball-on-disc wear test was applied to investigate the wear resistance in dry conditions.
According to the experiment results, Adding sodium tungstate beyond 5g/L leads to a two-step coating growth. In the first stage, the incorporation of melton MgWO4 entraps the plasma gas to attract the penetrating B-type discharge, resulting in a non-uniform coating growth. Later, the second stage discharge in pores densifies and thickens the coating uniformly. Appropriate addition of sodium tungstate enriches the coating with more high hardness Mg2SiO4, thereby enhancing the wear resistance. However, excessive addition makes the coating collapse due to the intense discharge in the first stage, resulting in a non-uniform coating thickness and reducing its wear resistance. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-10-24T17:03:11Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2023-10-24T17:03:11Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 致謝 i
摘要 ii Abstract iii 總目錄 iv 圖目錄 vi 表目錄 ix 第一章 前言 1 第二章 文獻回顧 3 2.1磨耗概論 3 2.1.1磨耗定義 3 2.1.2磨耗系統[13] 3 2.1.3磨耗分類[13] 5 2.1.4常見磨耗檢測裝置[13] 11 2.2鎂合金及其磨耗性質 13 2.3微弧氧化 16 2.3.1微弧氧化發展與放電理論 16 2.3.2電性參數與電源形式 20 2.3.2電解液配置 22 2.3.2鎂合金微弧氧化磨耗特性 30 第三章 實驗方法與步驟 34 3.1研究動機與實驗流程 34 3.2材料成分與試片製備 36 3.3微弧氧化設備與製程參數設定 37 3.3.1製程設備 37 3.3.2電性參數 38 3.3.3電解液成分 38 3.4 基本微結構、硬度分析 39 3.4.1掃描式電子顯微鏡(Scanning Electron Microscope, SEM) 39 3.4.2微硬度量測 40 3.5磨耗試驗 41 3.5.1 ball on disc磨耗試驗 41 3.5.2光學顯微鏡(Optical Microscope, OM) 43 3.6成分分析 43 3.6.1電子微探針(Electron Probe Microanalyzer, EPMA) 43 3.6.2能量散射X射線譜(Energy-dispersive X-ray Spectroscopy, EDS) 44 3.6.3穿透式電子顯微鏡 (Transmission Electron Microscope, TEM) 44 3.6.4背向散射電子繞射 (Electron Back Scatter Diffraction, EBSD) 45 第四章 實驗結果 46 4.1電壓對時間圖 46 4.2 基本微結構、硬度分析 48 4.2.1 微結構分析 48 4.2.2微硬度分析 58 4.3 ball on disc磨耗試驗 59 4.3元素與化合物組成分析 62 4.3.1 EPMA分析 62 4.3.2 EDS分析 66 4.3.3 TEM分析 67 4.3.4 EBSD分析 68 第五章 討論 71 5.1添加Na2WO4對成膜機制之影響 71 5.2第一電壓平台對氧化層性能之影響 75 5.3電壓第二次上升對氧化層性能之影響 76 5.4抗磨耗能力討論 78 第六章 結論 79 第七章 未來展望 80 參考文獻 81 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 鎢酸鈉 | zh_TW |
| dc.subject | 微弧氧化 | zh_TW |
| dc.subject | 鎂合金 | zh_TW |
| dc.subject | 抗磨耗 | zh_TW |
| dc.subject | 成膜機制 | zh_TW |
| dc.subject | growth mechanism | en |
| dc.subject | wear resistance | en |
| dc.subject | micro-arc oxidation | en |
| dc.subject | magnesium | en |
| dc.subject | sodium tungstate | en |
| dc.title | 添加鎢酸鈉對AZ31鎂合金微弧氧化層生長機制與抗磨耗能力之研究 | zh_TW |
| dc.title | Effect of sodium tungstate on growth mechanism and wear resistance of micro-arc oxidation coatings formed on AZ31 magnesium alloy | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 李志偉;楊舜涵;鄭憶中 | zh_TW |
| dc.contributor.oralexamcommittee | JYH-WEI Lee;Shun-Han Yang;I-Chung Cheng | en |
| dc.subject.keyword | 抗磨耗,微弧氧化,鎂合金,鎢酸鈉,成膜機制, | zh_TW |
| dc.subject.keyword | wear resistance,micro-arc oxidation,magnesium,sodium tungstate,growth mechanism, | en |
| dc.relation.page | 87 | - |
| dc.identifier.doi | 10.6342/NTU202303702 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2023-08-12 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 工程科學及海洋工程學系 | - |
| dc.date.embargo-lift | 2025-09-01 | - |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-111-2.pdf | 7.32 MB | Adobe PDF | 檢視/開啟 |
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