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Tribological Characteristics of Combined Layered Phosphate and Silicate Additives in Mineral Oil

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Abstract

A mixture containing α-Zr(HPO4)2·H2O, a small particle layered-phosphate, and α-Na2Si2O5, a microparticle-layered silicate, is investigated for its potential as an additive in mineral oil. A four-ball tester is employed to measure the maximum non-seizure load, wear scar diameter, and friction coefficient of the combined additives. Friction and wear tests indicate that synergistic behavior exists between the two base materials; the load capacity, anti-wear, and friction reducing ability of the base oil are markedly increased when the combined materials are added. More important is the combined materials exhibit considerable advantage over typical lubricant additives, such as MoS2 and graphite, presenting good application prospects as lubricant additives. The X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy results illustrate that the synergistic behavior of the combined material stems from the small α-ZrP particles confined in the valleys of the contacting surfaces that polish the wear surface, as well as the layered α-Na2Si2O5 microparticles that effectively fill voids in the wear surface.

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Acknowledgments

The authors thank the China National Funds for Distinguished Young Scientists (Grants 20825623), the Program for the Top Young and Middle-aged Innovative Talents of Higher Learning Institutions of Shanxi, and the Program for the Top Science and Technology Innovation Teams of Higher Learning Institutions of Shanxi for their financial support.

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  1. Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China

    Zhaofeng Chen, Xiaosheng Zhang, Hong Xu, Jinping Li & Jinxiang Dong

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  1. Zhaofeng Chen
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  2. Xiaosheng Zhang
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  3. Hong Xu
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  4. Jinping Li
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  5. Jinxiang Dong
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Correspondence to Jinxiang Dong.

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Chen, Z., Zhang, X., Xu, H. et al. Tribological Characteristics of Combined Layered Phosphate and Silicate Additives in Mineral Oil. Tribol Lett 43, 197–203 (2011). https://doi.org/10.1007/s11249-011-9801-y

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  • DOI: https://doi.org/10.1007/s11249-011-9801-y

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