Synergetic Effect of CeO₂ Doping on Structural and Tribological Behavior of Fe-Al₂O₃ Metal Matrix Nanocomposites

Abstract

Cerium oxide (CeO2) doped iron (Fe) - alumina (Al2O3) metal matrix nanocomposites were studied. Doped with 0.5 and 1.0 percent CeO2, the nanocomposites in this system were made in the lab. Powder milling, die pressing, and sintering at 1100°C for one hour in an atmosphere-controlled furnace were used to develop the specimens. Microstructural inspection of a worn-out surface on the prepared specimens was performed in addition to the phase determination and microstructural assessment that were performed on the fabricated specimens. Fe, Al2O3, CeO2, and FeAl2O4 phases were all seen in the X-ray diffraction data. There were nano dispersion of FeAl2O4 and CeO2 particles in the dense phase microstructure of the produced samples. Increasing the amount of cerium oxide in the material resulted in an increase in both density and hardness. The specimen's wear rate was shown to decrease with an increase in cerium oxide content %. The present developed material will be useful for heavy duty applications like railway wagon wheels.

Engineering Electrical and Thermal Attributes of Two-Dimensional Graphene Reinforced Copper/Aluminium Metal Matrix Composites for Smart Electronics

“…4c. 85,87 In another study, the electrical conductivity of Cu-RGO composite gradually dropped with addition of even small fractions of RGO. The %IACS of pure copper decreased steadily from nearly 96% to 70% with 1 wt% of RGO.…”

“…86 However, the electrical conductivity of multi-layered graphene (MLG) Cu green composite owing to the excessive presence of porosities as compared to graphene/Cu sintered composites continuously decreases with an increase in the contents of reinforcements. 87,88 Further, using high-quality graphene (HQG) converted from RGOs to fabricate HQG-Cu composite provides better electron mobility of the order of 1000 cm 2 /V*S. As shown in Fig. 6a, the electrical conductivity of HQG-Cu increased significantly with the increase in contents of HQG to 1 wt% in Cu matrix compared to pristine Cu.…”

Thermal Stability and High-Temperature Super Low Friction of γ-Fe2O3@SiO2 Nanocomposite Coatings on Steel

“…Rare earth not only improves the high-temperature hardness of the coatings but also increases the 2 of 13 bonding strength of the reinforcements [40]. Ceria (CeO 2 ) is widely used in many applications, and it is a favorable material in nanocomposites based on the remarkable tribological properties [41][42][43][44][45]. For example, the Cr 3 C 2 -NiCrCoMo/nano-CeO 2 composite coatings achieve high temperature and a low CoF [43].…”