The passive films formed on laser-beam-melted (LBM) and conventional 17-4PH martensitic stainless steels were studied by electrochemical impedance measurements in a 0.5 M NaCl solution at the corrosion potential. described as dielectric layers, data showed that Young model was most appropriate to describe their electrical properties. Fitting of led lower capacitance values, associated with thic...

Abstract Bimetallic copper-steel composite could be an effective structural material to improve the performance of traditional nickel-aluminum bronze (NAB) ship propeller due its high strength and corrosion resistance. In this work, defect-free NAB coatings has been successfully fabricated by laser direct depositing technique on 17-4PH stainless steel substrate. The phase constitution, microstr...

We investigate the thermal transport properties of NbN by considering three-phonon scattering (3ph), four-phonon (4ph), electron-phonon (ep) scattering, and isotope (iso) scattering. By 4ph we find that has less effect on lattice conductivity (κ ph ) within 3-9 THz, while ep a greater κph which is close to 3ph in this frequency range. When pressure increased 15 GPa, κ 148%, due decrease phase s...