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Different thicknesses (2–250 nm) of Cu films were deposited on glass substrate by RF magnetron sputtering in Ar and Ar + H 2 atmospheres at room temperature. It is found that crystallinity and conductive properties of the films enhance but visible light transmittance (T Vis) decreases with increase of film thickness. Compared with the Cu films deposited in Ar, those deposited in Ar + H 2 have higher crystallinity and surface roughness, and they have better conductive properties and higher T Vis at film thickness above 5 nm. Overall, the Cu films deposited in Ar and Ar + H 2 can be achieved higher figure of merit (FOM) in a thickness range of 3~5 and 5~8.5 nm, respectively. Furthermore, the higher FOM values of Cu film deposited in Ar + H 2 atmosphere are higher than those of Cu film deposited in Ar atmosphere. The correlation between the improvement of transparent conductive properties of Cu films and modification of film microstructure due to introduction of H 2 into deposition atmosphere is discussed. • Cu films with different thicknesses are prepared in Ar and Ar + H 2 atmospheres. • The ρ , n , μ and R s of Cu films with different thicknesses are investigated. • High FOM of Cu films can be obtained by optimizing the film thickness. • Effect of introducing H 2 on structure and properties of Cu films is analyzed. • Transparent conductive properties of Cu films can be improved by introducing H 2. [ABSTRACT FROM AUTHOR]

The effects of strain rate on mechanical properties, microstructural evolution and underlying deformation mechanisms of two kinds of interstitial CrMnFeCoNi high entropy alloys (HEAs), (CrMnFeCoNi) 99.5 C 0.5 and (CrMnFeCoNi) 99.0 C 1.0 , are investigated under quasi-static and dynamic tension. Dynamic loading is carried out via a split Hopkinson tension bar system. The pre- and post-deformation microstructures are characterized with electron back scatter diffraction and transmission electron microscopy. Both yield strength and work hardening increase remarkably with increasing strain rate. Plastic deformation in both alloys under quasi-static and dynamic loading are dominated by dislocations, stacking faults, kink bands and deformation twins. Twinning is activated easier under dynamic loading, and twin density decreases with increasing carbon content due to the increased stacking fault energy. The Khan-Liu constitutive model can describe the experimental results for these two interstitial HEAs in a wide strain range. • Both volume fraction and size of the carbides increase with the increase of C content. • The increase of C content and strain rate lead to the increase in σ Y and σ UT. • Twin density decreases with increasing C content due to the increased SF energy. • The Khan-Liu constitutive model is used to describe the deformation. [ABSTRACT FROM AUTHOR]