FABRICATION AND CHARACTERIZATION OF MICROSTRUCTURE MECHANICAL PROPERTIES NANOCOMPOSITES BASED ON NICRALY ALLOY REINFORCED WITH SI3N4 PARTICLES BY SPARK PLASMA SINTERING METHOD

This research work aims at investigating the influence of a fixed content silicon nitride (Si3N4) and varied contents graphene nanoplatelets (GNPs) on physical (density, structural, morphological) mechanical properties (microhardness, nanoindentation) Al-Si3N4-GNPs composites. The composites were fabricated by microwave-assisted powder metallurgy route. Si3N4 concentration was (5 wt.%) in while...

The increasing demand for sustainable tribology has accelerated the development of environmentally friendly lubrication solutions such as water or water-related lubricants. Earlier works have reported on water-lubricated sliding silicon nitride (Si3N4) at high speeds, which can result in a superlow friction (μ < 0.01) owing to formation hydrodynamic films hydrophilic surface layers. Here, combi...

The enhanced self-phase modulation (SPM) in silicon nitride (Si3N4) and (Si) waveguides integrated with graphene oxide (GO) films is experimentally demonstrated. By using both picosecond femtosecond optical pulses, we observe significant spectral broadening the due to high Kerr nonlinearity of GO films. maximum factors up ~3.4 ~4.3 are achieved GO-coated Si3N4 Si waveguides, respectively. for p...