Sn和Cu奈米顆粒做為添加劑加入鋰基潤滑油脂的降摩擦和抗磨損性質

Anti-wear and friction properties of Sn and Cu nanoparticles as additives in the lithium grease

羅晉德(Jin-De Luo)

指導教授 ： 張合 ； 魏大華

國立臺北科技大學/機電學院/製造科技研究所/碩士(2013年)

摘要

Sn奈米顆粒在摩擦過成中容易溶化成液滴，以液體滾珠形式潤滑摩擦表面，進而降低摩擦及減少磨耗；Cu奈米顆粒強度大且硬度小、熔點高、導熱性好、能在摩擦表面進行修補，因此降低摩擦及減少磨耗；鋰基潤滑脂具有良好機械安定性、抗水性、防鏽性及氧化安定性，適用於工作溫度在-20°C~120°C，常用於飛機、汽車、坦克與各種機械設備之軸承潤滑，因此本論文以Sn和Cu奈米顆粒作為潤滑添加劑加入至鋰基潤滑油脂中研究其磨潤特性。在本研究中，以XRD、SEM分析Sn、Cu奈米顆粒物質特性。使用與ASTM G99相符規範之自製迴轉式磨耗試驗機，並在相同測試條件下，研究Sn、Cu奈米顆粒作為添加劑之磨潤特性。磨潤試驗完成後，對上下試片進行表面觀測，其中包含磨耗表面形貌與表面元素分析，以及對摩擦係數、磨疤直徑與表面粗糙度差異進行分析，並歸納出Sn、Cu奈米顆粒在磨潤試驗中所運作之機制。結果表明在相同測試條件下，Sn、Cu奈米顆粒分散於鋰基潤滑油脂中最佳添加劑量分別為1.0wt%及 0.15wt%，並且可以大大提升磨潤性質，摩擦係數與磨疤直徑個別與鋰基潤滑油脂相比Sn奈米顆粒減少為71.5%和54.1%，Cu奈米顆粒減少為74.1%和56.5%，並且發現在磨潤表面會產生填補與沉積作用。

關鍵字

Sn ； Cu ； 奈米顆粒 ； 鋰基潤滑油脂 ； 磨潤特性

並列摘要

Sn nanoparticles in the friction over into easy to dissolve into droplets to form a liquid lubricating ball friction surface, thereby reducing friction and reduce wear. Cu nanoparticles high strength and low hardness, high melting point, good thermal conductivity, can be patched at the friction surface, thus reducing friction and reduce wear. Lithium grease has excellent mechanical stability, water resistance, rust resistance and oxidation stability, applicable to operating temperatures -20°C ~ 120°C, commonly used in aircraft, automobiles, tanks and all kinds of machinery equipment lubrication of bearings.Therefore,this aim of this paper was to study tribological properties of Sn,Cu nanoparticles as lubricant additives added to the lithium base grease. In this study, Sn,Cu nanoparticles material properties analysised by XRD and SEM.Use consistent with the specifications of ASTM G133-made rotary abrasion tester,in the same test conditions, research Sn,Cu nanoparticles as additives tribological properties.After tribological experiments were finished,the worn surface of up-and-down specimens was observed through surface elements and appearance of worn surface,summarized Sn,Cu nanoparticles in the tribological tests in the operation of the mechanism.The results show that under the same test conditions,Sn,Cu nanoparticles dispersed in a lithium-based grease in optimal amount of additives respectively by 1.0wt% and 0.15wt% and can be greatly improved tribological properties,friction coefficient and wear scar diameter of the individual compared with lithium base grease Sn nanoparticles was reduced to 71.5% and 54.1% , found that the tribological surface will produce to fill and sedimentary.

並列關鍵字

Sn ； Cu ； Nanoparticles ； lithium-based grease ； tribological properties

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