本研究以含有金剛石顆粒的油精分別以不同體積百分比的方式添加於潤滑油內，調配出0、1、2及3％等四種濃度。其中上試件（vanes）為冷作工具鋼SKD11，下試件（ring）為經過熱處理之熱作工具鋼SKD61，以vanes-on-ring型式模擬活塞環於汽缸壁內的運動模式，進行油潤滑磨潤實驗。將探討濃度比例對於抗擦損（anti-scuffing）的潤滑性質，以及擦損發生之機制與擦損區域鮮少深入討論的微結構組織發生變化之原因。
磨潤實驗均以Falex #6磨耗試驗機與Red lion數據擷取器進行，實驗中可以取得摩擦係數、潤滑油溫度及接觸電組（Electrical contact resistance）。在擦損現象發生時，劇烈的磨耗造成摩擦係數瞬間陡升的情況，並且伴隨著噪音與顫動。再由油溫的明顯略升及接觸電阻瞬間下降，加以確認擦損產生及解析發生機制。並且量測實驗前後的試件重量與表面粗度值，計算各濃度的摩擦能量（friction energy）及發生擦損的次數，探討其潤滑性質。並於擦損區域的觀察與檢測，使用光學顯微鏡（OM）及掃描式電子顯微鏡（SEM）觀察磨耗表面。以表面形貌儀（XP-2）進行擦損點的3D形貌掃描，並運用能量分散光譜分析（EDS）進行化學成分分析。為了深入暸解擦損區域的結構變化，使用聚焦離子束（FIB）以轟擊表面，使原始材料移除，達到切除功能，進行縱剖面觀察與製備TEM試片。進而利用穿透式電子顯微鏡（TEM）之明視野像（BF）和暗視野像（DF）、能量分散光譜分析（EDS）及擇區繞射圖（SAD）等功能，分別進行高解析地觀察表面結構樣貌、化學成分分析及判斷結構晶相。從這些儀器觀察與檢測，可以知道添加油精濃度對於擦損現象之關係，區別發生擦損前中後的磨耗表面差異，深入探討擦損區域的結構變化，得知擦損產生的機制與原因。
根據實驗結果顯示，隨著添加油精濃度的增加，擦損磨耗能有效地抑制發生，整體呈現的潤滑性質於添加3 vol.％為最佳的濃度。且確認了上試件材料轉移至下試件表面的黏著磨耗，發現摩擦係數陡升後的下試件表面，因擦損磨耗於黏著物上產生磨損點，並為低於磨耗水平面之窪地區域，且偵測出碳（C）與氧（O）元素含量偏高，以及出現硫（S）元素，確認了產生化學反應。並生成一層約1~2μm厚度之非結晶結構的Fe2O3 。於窪地區域的縱深方向，觀察出α-Fe轉換γ-Fe之鐵相變化，間接驗證了窪地區域受過800℃以上高溫。最後合理地解釋擦損磨耗造成摩擦係數陡升的機制，提出ㄧ個擦損磨耗之模型。並且，在於窪地內發現規則性的洞口結構，以葛拉秀夫數（Grashcf Number）去估算發生本納細胞（benard cell）的可能性，並推論其潤滑油沸騰產生的油氣，形成本納細胞較為合理。

Oil additive with the diamond nanoparticles which mix four kinds of concentrations has been added in oil R68. The upper specimens (vanes) were made of SKD11 alloy steel. The lower specimen (ring) was made of heat-treatment SKD61 alloy steel. The tribological test was performed in the form of vanes-on-ring under oil-lubricated condition. Discuss about how the different concentrations will effect on the anti-scuffing through reviewing the retrieved data of the whole test process. The change of microstructure was observed in the scuffing area by different kinds of analysis, such as micro figure measuring instrument, optical microscope, x-ray diffractometer, scanning electron microscopy, energy dispersive spectrometer, focused ion beam and transmission electron microscope.
The results show that the anti-scuffing behavior and tribological properties of 3 vol.% was the best. SEM and EDX analysis revealed that the material transfer was occurred from upper specimen to the lower specimen surface. Moreover, the lap of the adhesion materials existed in the wear surface after a sudden rise in friction. EDX analysis indicated the lap region consists of Fe, O and C. In addition S is present. Reaction layer whose thickness is around 1~2 μm exists in the lap region by FIB analysis. Local EDX and TEM analysis revealed that reaction layer is an amorphous structure of Fe2O3. Electron diffraction pattern in different depth of lap region exhibits phase transformation of α-Fe into γ-Fe. It explained that the lap region had heated at high temperature and that temperature was higher than 800℃. Finally, a plausible scuffing mechanism was proposed in the research. Moreover, ordered hole structure was discovered in a lap region. Using Grashof Number to count for the possibility to occur the Benard cell and deduces the oil gas which produces this Benard cell to be reasonable.

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