Abstract

In this work, we investigated how DC and pulsed DC Ar gas plasma treatment changes surface topography and chemical composition of silicon and expanded Polytetrafluoroethylene (ePTFE) substrates and how different surface pretreatment techniques can affect the formation and hydrogenation of Mg and Mg–Ti films. It is observed that pre-treating Si and ePTFE substrates with different plasma modes results in significant changes of microstructures of as-deposited Mg and Mg–Ti films. After the hydrogenation of Mg films at 20 bar H2 pressure and 180 °C temperature the formation of crystalline MgH2 phase is observed only for the films deposited on plasma non-treated Si substrates which had the films with smallest dimensions of its columnar structure. It is known that, usually, Ti additives has positive effect on hydrogenation properties of Mg, but in this study independently of the used substrate pre-treatment technique after the hydrogenation of Mg–Ti films their XRD analysis showed no peaks of the crystalline hydride phase. However, depending on the surface properties of the substrate after hydrogenation Mg–Ti films also have several disparities which are discussed and attributed to the potentially related substrate features.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.