Abstract
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.
Highlights
Polymeric materials, such as epoxy (EP), feature a wide range of applications in various industries as substitutes for metals due to their unique mechanical and tribological properties [1]
We focused on surface modification of natural mineral garnet and understanding the tribological properties of EP composite reinforced with modified garnet (MG) as a low-cost filler material
Thethe hydrophilic surface of garnet powder must bemust modified to becometooleophilic matrix.hydrophilic surface of garnet powder be modified become before preparation composite materials
Summary
Polymeric materials, such as epoxy (EP), feature a wide range of applications in various industries as substitutes for metals due to their unique mechanical and tribological properties (friction and wear resistance) [1]. Polymeric materials require more in-depth research to ensure their safety and economic and environmental efficiency. EP can be reinforced with rubber, glass fiber, thermoplastic resin, or inorganic particulates [3,4]. During the past decades, studies of inorganic particulate-filled EP composites have been carried out to examine their tribological properties [5,6,7]. Natural inorganic mineral particles used in EP composites remain unappealing, limiting their study in this field. Natural particles can potentially have extensive application with their distinctive properties and economic benefits
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