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The combined effect of nano-SiO2 and nano-Al2O3 as fillers on the tribological properties of Kevlar fabric/phenolic laminate (KFPL) in water was investigated. Results showed that the single addition of nano-SiO2 at a proper content decreased the friction coefficient of KFPL to an ultralow value at the cost of an increased wear rate. The single addition of nano-Al2O3 at a proper content reduced the wear rate of KFPL with fluctuation in the friction coefficient curve. The combined addition of nano-SiO2 and nano-Al2O3 not only endowed KFPL with an ultralow friction coefficient originated from nano-SiO2 but also improved the wear resistance. This means that the combined addition of nano-SiO2 and nano-Al2O3 can have positive effects and inhibit their negative aspects to some extent.
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Liu et al. (2015) studied this question.
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