本研究使用自行研製之高精度電蝕試驗機及掃瞄電子顯微鏡探討在靜態與動態條件下，添加含有不同濃度導電性二硫化鉬（MoS2）添加劑之潤滑油，在不同直流供應電壓、供應電流、和油膜厚度等實驗參數下，軸承鋼球對中碳鋼平板之潤滑表面的電氣行為和作用力及損傷形成機制。
實驗結果發現，在靜態電蝕情況下，由門檻電壓和油膜厚度及顆粒濃度所組成之含電蝕和非電蝕等兩個區域的電蝕型態圖，電蝕區域隨著MoS2濃度及供應電流之增加而擴大。又，電蝕面積與界面功率的比值（Ad/P）隨著油膜厚度和MoS2濃度的增加而急速增加。這是由於MoS2具有促進熔融金屬凸起成長而推開兩試片之作用。界面功率主要消耗於凸起和界面材料的加熱。此外，MoS2濃度並不影響凸起材料的拉伸強度。
從動態表面損傷觀察結果得知，添加導電性MoS2粉末使平板電蝕表面寬度更為明顯。且電蝕的寬度隨油膜厚度和MoS2濃度的增加而增加。從垂直力和摩擦力、界面阻抗及表面觀察等實驗結果推論出靜態和動態的潤滑表面電蝕形成過程模式圖。

In this study, a electrical pitting tester and SEM are employed to investigate the effects of supply voltage, supply current, and oil film thickness on the electrical behavior, the action forces, and the formation mechanism of electric pitting for the lubricated surface of steel pair at sliding speed of 1μm/sec using an additive of MoS2 in paraffin base oil under DC electric field.
According to the experimental results and the observations of the surface pitting, two electrical pitting regimes are found under the influences of shaft voltage, oil film thickness, and particle concentration of additive, namely, pitting and no- pitting regimes in static condition. The area of pitting regime increases with increasing additive concentration and supply current. Furthermore, The ratio of pitting area to the interface power increases rapidly with increasing additive concentration and oil film thickness. This results from the molten plateau that directly connects two specimens, and the interface power is mainly consumed at the heating of the plateau and the interfacial materials. However, the weld strength of the plateau isn’t influenced with additive concentration.
It is known from the observations of the surface pitting in dynamic pitting occurs that the pitting width increases with increasing oil film thickness and additive concentration. Finally, the formation processes of electric pitting on the lubricated surface for both static and sliding conditions are deduced from the results of the normal force, the friction force, the interface impedance and the observations of the surface pitting.

總 目 錄
總目錄 Ⅰ
圖目錄 Ⅳ
表目錄 Ⅸ
中文摘要 Ⅹ
英文摘要 ⅩⅠ
符號說明 ⅩⅢ
第一章 緒論 1
1-1 研究動機 1
1-2 軸電壓與軸電流之來源 2
1-3 放電現象之發生與種類 6
1-4 文獻回顧 8
1-4-1 軸電壓、軸電流形成之原因 8
1-4-2 軸電流對軸承電蝕蝕之影響 9
1-4-3 電蝕機制之探討 11
1-4-4 二硫化鉬電蝕潤滑特性之探討 12
1-4-5 電流變流體機制與放電加工機制之探討 13
第二章 實驗設備與方法 16
2-1 高精度動態電蝕試驗機 16
2-1-1 動態電蝕試驗機系統 19
2-1-2 量測與資料收集分析系統 20
2-1-3 實驗時間之設定 22
2-1-3 滑動及油膜厚度控制系統 23
2-2 實驗材料、潤滑油及添加劑二硫化鉬性質 25
2-2-1 鋼材配對之尺寸及材料特性 25
2-2-2 試片處理方法 27
2-2-3 潤滑油 29
2-2-4 二硫化鉬之處理 29
2-2-4 二硫化鉬之特性 29
2-3 實驗條件 31
2-4 實驗步驟 32
2-4-1 試片平行度校正 32
2-4-2 試片間接觸區與非接觸判斷 33
2-4-3 油膜厚度之調整 33
2-4-5 實驗之等效電路圖 36
2-4-6 電蝕試驗之實驗步驟 38
第三章 實驗結果與討論 41
3-1 靜態電蝕 41
3-1-1 界面電壓與界面阻抗 41
3-1-2 電蝕形成的門檻條件 44
3-1-3 電蝕表面之觀察 49
3-1-4 凸起的形成機制 53
3-1-5 界面功率之消耗 64
3-2 動態電蝕 67
3-2-1 界面電壓與界面阻抗 67
3-2-2 電蝕表面之觀察 72
3-2-3 動態電蝕的形成機制 76
3-2-4 滑動狀態下之正向力與摩擦力及摩擦係數 81
3-2-5 界面功率之消耗 89
第四章 結論 91
參考文獻 93

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