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Languages: English
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Polyalphaolefin fluids are gaining rapid acceptance as high-performance lubricants and functional fluids because they have certain inherent, and highly desirable, characteristics relative to mineral oils. One of these characteristics is their low toxicity. It combined with excellent viscometrics and lubricity, have made low-viscosity PAO fluids an important component in lubricant formulations. Typical data found in product specifications for lubricants are the kinematic viscosity and the viscosity index. These values do not give enough information to choose the optimum lubricant for a lubricated contact. In mechanical systems take place rolling, sliding and rolling/sliding contacts, therefore lubricants have to work the best possible in these operation conditions. In this study are experimentally determined the L50, L10 and Weibull´s slope () of polyalphaolefins with two different viscosities. This test was made on a four-ball machine (Stanhope Seta). Wear test also was made on a four-ball tester (Roxana) in order to measure the wear scar diameter (WSD), and the flash temperature parameter (FTP). Lubricants were identified through infrared spectroscopy, and ball´s pittings were observed with SEM.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • [1] Shubkin, R. L. Polyalphaolefins. In Synthetic Lubricants and High-Performance Functional Fluids. Ed. 1993, Marcel Dekker. New York, pp. 1-40.
    • [2] Totten, George E. Handbook of Hydraulic Fluid Technology. Ed. 2000, Marcel Dekker. New York, pp. 827.
    • [3] Larsson, R., Kassfeldt. Base fluid parameters for EHL and friction calculations and their influence on lubrication capability. In Proceeding of 12th International Colloquium Tribology 2000 - Plus. Esslingen 2000. 1525-1536.
    • [4] William Batchelor, Andrew; Nee Lam, Loh; Chandrasekaran, Margam. Materials Degradation and its Control by Surface Engineering. Imperial College Press, 1999. p. 58.
    • [5] Jin, X. Z.; Kang, N. Z. A Study on Rolling Bearing Contact Fatigue Failure by Macro-Observation and Micro-Analysis. Hangzhou Bearing Test and Research Center.
    • [6] Wang, Yinglong; Fernández, J.E.; Cuervo, D.G. Rolling-contact fatigue lives of steel AISI 52100 balls with eight mineral and synthetic lubricants. Wear 196 (1996) 110-119.
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