奈米粉體潤滑油之磨潤特性研究

Tribological Properties of Nanoparticle as Additive in Lubricating Oil

崔偉哲(Wei-Che Tsui)

指導教授 ： 吳浴沂

國立臺北科技大學/機電學院/車輛工程系所/碩士(2005年)

摘要

奈米科技為二十一世紀最重要的前瞻領域之一，且應用極為廣泛，若能利用奈米粉體潤滑油於車輛引擎，預期將有減少摩擦損失及抗磨耗的作用。本文選擇不同奈米粉體添加於引擎潤滑油中，利用TE77往復式摩擦試驗機進行測試，並量測摩擦係數及兩摩擦試片間之接觸電阻。分別利用穿透式電子顯微鏡、光學顯微鏡及場發射掃瞄式電子顯微鏡等分析儀器，觀察奈米粉體顆粒形狀與試片表面磨耗之微觀結構型態。並且透過能量分散光譜儀，對於試片摩擦表面的化合膜成份進行分析。實驗結果顯示，添加不同種類奈米粉體於潤滑油中，具有減少摩擦係數與降低磨耗深度的性能表現，又以添加氧化銅後之效果最為顯著。實驗中，SF級機油於高溫產生的化合膜受到CuO影響而被破壞，判斷摩擦係數的降低，可能是受到奈米粉體於兩接觸表面間之滾動摩擦方式取代原先之滑動摩擦，故推論奈米粉體固體潤滑效果為其主要機制。

關鍵字

奈米粉體 ； 潤滑油 ； 磨潤特性 ； 邊界潤滑

並列摘要

Nanotechnology is granted as the most promising technology of the twenty-first century. It can be used extensively in many fields. The application of nanoparticle as additive in lubricating oil for vehicle engine is expected to exhibit friction-reduction and anti-wear properties. The tribological properties of the nanoparticle as additive in lubricating oil were tested using the Plint-TE77 reciprocating sliding friction test machine, and then to measure the friction coefficient and contacting resistance between two rubbing specimens. The size and shape of nanoparticle and the topography of worn surface were observed using the transmission electron microscopy (TEM), optical microscope (OM) and field emission scanning electron microscopy (FE-SEM), respectively. The energy dispersion of x-rays (EDX) was employed to analyze the composition of the chemical films on the rubbing surface. The experimental results show that the nanoparticle as an additive for lubricant can reduce the friction coefficient and wear depth of the wearing surface, especially for the CuO nanoparticle. When CuO nanoparticle added to SF oil, the chemical film was broken at high temperature. However, the friction coefficient was decreased. The possible reason is that the rolling friction replaces the sliding friction on contacting surface. Therefore, this paper infers that the effect of solid-lubrication of nanoparticle were the major tribology mechanism.

並列關鍵字

Nanoparticle ； Lubricating oil ； Tribology ； Boundary lubrication

參考文獻

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