Tribological and Mechanical Properties of Epoxy Reinforced by Hybrid Nanoparticles

W.H Alhazmi,S Mousa,H.E.M Sallam,A.A Abd-Elhady,Y Jazaa

doi:10.1590/1679-78256384

Abstract

Abstract In the present work, the nano-Aluminum oxide (Al2O3), nano-Silicon Carbide (SiC), or a hybrid of them were infused into epoxy resin with an ultrasonic system with various weight percentage ratios of the nanoparticles. Small punch testing (SPT) and indirect tension testing were adopted to measure the tensile properties of the present nanocomposites. Pin-on-ring wear testing was also performed to examine wear performance of epoxy Al2O3 and SiC nanocomposites. The Finite Element Analysis method is introduced to simulate the indirect tension test and SPT to give a complete vision of the stress distribution in the nanocomposite specimen during the loading, and to examine its mode of failure. Good agreement between the numerical and experimental results was observed. The addition of nanoparticles from Al2O3 or SiC improves the wear resistance of epoxy. Furthermore, epoxy with nano-Al2O3 has a higher wear resistance than that with nano-SiC. The tensile strength and modulus of elasticity of epoxy are reduced by adding the Al2O3 nanoparticle. The synergistic effect is not observed in the present study.

Highlights

Epoxy resins containing more than one compound belonging to the category of thermosetting resins have multiple specifications including adhesion strength, chemical stability, and electrical insulation (Ma et al.,2018, 2019;Zhang et al, 2018a; Hu et al.,2 018; Gu et al, 2019; Gong et al, 2019; He et al, 2019; Zhang et al 2019)
The high hardness for silicon carbide could contribute to reducing wear resistance performance due to the three-body stuck between surface asperities on the wear track; the materials on the wear track cause some damage to the wearing surface
The modulus of elasticity, E, of the specimen can be estimated by using the value of the slope of the elastic region of Small Punch Test (SPT) load-displacement (Chica et al, 2017), and it follows that the empirical correlations between SPT experimental results and E can be given as: E = ë * Slope where ë is correlation factor computed by using the modulus of elasticity of the epoxy (3.7 GPa)

Summary

Introduction

Epoxy resins containing more than one compound belonging to the category of thermosetting resins have multiple specifications including adhesion strength, chemical stability, and electrical insulation (Ma et al.,2018, 2019;Zhang et al, 2018a; Hu et al., ; Gu et al, 2019; Gong et al, 2019; He et al, 2019; Zhang et al 2019). Because of these characteristics, these resins have been used widely as matrices in numerous applications (Zhang et al.,2018b). These characteristics are reflected as advantages in increased resistance of the composite, including nanoparticles for wearing rate, compared to larger particles; this type of nanoparticle can yield a layer of strong film that blends with wear debris (Ash et al, 2002; Schwartz and Bahadur, 2000)

Objectives

Results

Conclusion