Synthesis of graphene oxide coated metal powders with improved flowability and reduced reflectance

In this study, a method has been developed to coat metal powder particles (Fe, 316L stainless steel and Cu) with graphene oxide (GO). The is based on using pH window where opposite zeta potentials cause the GO sheets be attracted passive layer of surface rotary evaporator mixing achieve good dispersion control concentration GO. pH-dependent interactions Cu Fe powders in solution have investigated by dispersions between 4.2 11.3, it could observed that attached surfaces up ~8 for both Fe. At lower potential becomes less negative oxidation more prominent. Based these observations, just below IEP oxides was used adhere controlled concentrations distribution which verified SEM Raman spectroscopy mapping. X-ray diffraction evaluate oxides. Some relevant properties were before after coating reflectance near-infrared 1070 nm wavelength range reduced 66 %, depending amount coating. Flowability measurements showed flowability coated improved significantly while pure relatively unaffected results show can useful additive manufacturing processes laser fusion technique low high are important.