Effect of Yttrium Oxide on Mechanical and Physical Properties of Fe–10%Cu Composite

Abstract

Iron-based composites have found a lot of industrial applications such as bearings, camshafts, connecting rods, pulleys, various valves, oil pump gears and many other applications in the automotive and other industries due to their low cost, availability, and high strength. The present study aims to prepare Fe-10 vol.% Cu - (0 – 5) wt.% nano Y2O3 composites by powder metallurgy technique and studying their physical and mechanical properties. The powders were mixed into ball mill for 30 minutes, followed by room temperature uniaxial compaction at 700 MPa for 3 minutes. The green specimens were sintered at 1000 oC for 1 hour. The results of the present study showed that nano yttrium oxide has significant effects on both physical and mechanical properties of Fe-10%Cu composite. The bulk density was increased by 0.92% and the true porosity was decreased by 6.4% on increasing the nano oxide content from 0% to 3% respectively. Vickers microhardness was increased by 5.9% on increasing Y2O3 up to 1% followed by gradual decrease on further increase above 1%. Wear rate was decreased by 21% on increasing the nano oxide content from 0% to 3%. On the other hand, the compressive strength was decreased by 47% on increasing Y2O3 up to 5%

Frictional Pressure Drop and Cost Savings for Graphene Nanoplatelets Nanofluids in Turbulent Flow Environments

“…The diameter of the graphene layers ranges from 1-100 µm, while their thickness is measured in nm [12]. The hydrophobic nanoparticles can be functionalized by covalent (functional groups) and non-covalent (surfactants) modification techniques [13][14][15]. The non-covalent approach depends on polar-polar interactions to prevent solid GNPs from sedimenting into a homogenous slurry by covering the graphene surface area with surfactants/polymers that act as stabilizers [16].…”

“…Their results showed a 9.22% increment in the thermodynamics properties using 0.1 wt.% nanofluid at a Re of 17,500. Sadri et al [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] produced stable and eco-friendly CGNPs-H 2 O nanofluids for heat transfer and hydrodynamic applications. The friction factor increased by ~3.79% for 0.1 wt.% They believed that the increased pressure drop was due to a minor rise in the viscosity of all of the CGNPs-DW nanofluids, which necessitated a nearly insignificant increase in the fluid velocity due to the constant Re.…”

Application Preparation of High‐Performance Iron‐Based Powder Metallurgy Sintered Materials in Sports Industry

“…On the other hand, increasing Y2O3 to 5% reduces the compressive strength by 47%. However, his research results do not have specific examples of combining with other industries to support his theoretical research results [2]. Over the years, technological development has had a huge impact on sports performance and has promoted the development of specific materials and manufacturing processes for sports-related products.…”