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    Surface-Modified Garnet Particles for Reinforcing Epoxy Composites

    Year: 2018

    Journal: Minerals, Volume 8, MAY

    Authors: Jiang, Yiming; Xu, Fengping; Liu, Kun; Feng, Qiming

    Organizations: National Natural Science Foundation of China [51774330]; Teacher Research Foundation of Central South University; Fundamental Research Funds for the Central Universities of Central South University [2017zzts660]

    Keywords: epoxy composites; garnet; reinforcement; surface modification; friction

    The present study investigated the tribological performance of epoxy (EP) matrix composites enhanced with natural garnet. The garnet was surface-modified with sodium stearate for optimal performance. Composites comprising different contents and particle sizes of modified garnet (MG) were prepared with a mixture of EP and MG. The sodium stearate-bonded garnet and EP formed a stable structure. Tribological performance was measured by a ball-on-plate apparatus under permanent dry sliding conditions and a wear track was obtained by an optical profilometer. The wear mechanism was explored by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) images. Wear test results showed that the coefficient of friction for all EP/MG composites decreased compared with that for neat epoxy. The results also indicated that the addition of MG can evidently improve the tribological properties of EP matrix composites.
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