Development of oxidation-resistant and electrically conductive coating of Ti–Al–C system for the lightweight interconnects of solid oxide fuel cells
Viktoriya Podhurska,
Oleksandr Kuprin,
Tetiana Prikhna,
Orest Ostash,
Darius Pohl,
Myroslav Karpets,
Volodymyr Sverdun,
Tetiana Serbeniuk,
Roman Chepil,
Pavel Potapov,
Semyon Ponomarov
Affiliations
Viktoriya Podhurska
Department of Hydrogen Technologies and Alternative Energy Materials, Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova str., Lviv, 79060, Ukraine; Corresponding author.
Oleksandr Kuprin
National Science Center Kharkiv Institute of Physics and Technology, Kharkiv, Ukraine
Tetiana Prikhna
V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Orest Ostash
Department of Hydrogen Technologies and Alternative Energy Materials, Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova str., Lviv, 79060, Ukraine
Darius Pohl
Dresden Center for Nanoanalysis (DCN), TU Dresden, Germany
Myroslav Karpets
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine
Volodymyr Sverdun
V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Tetiana Serbeniuk
V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Roman Chepil
Department of Hydrogen Technologies and Alternative Energy Materials, Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova str., Lviv, 79060, Ukraine
Pavel Potapov
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Dresden, Germany
Semyon Ponomarov
Institute of Semiconductor Physics of the NAS of Ukraine, Kyiv, Ukraine
The paper studies oxidation resistance and electrical conductivity of dense coatings produced by vacuum-arc deposition technique on α-titanium thin (0.1 mm) substrate using a hot pressed Ti2AlC–TiC target. The coatings were deposited at low (7 mA/cm2) and high (15 mA/cm2) current densities on the substrate and marked LCD and HCD, respectively. This provided different local chemical and phase compositions of the coatings. It was found that phase compositions of the coatings differ from that of the target. The HCD coating has high oxidation resistance evaluated in terms of the specific weight gain (Δm/S = 0.06 mg/cm2) as well as high surface electrical conductivity (σ = 1.23·106 S/m) after long-term (1000 h) holding at 600 °C in the air due to the formation of an over thin (450 nm) Ti–Al-(C, O, N) near-surface layer. The thin titanium substrate with such Ti–Al–C coating is recommended as a lightweight interconnect of an intermediate-temperature solid oxide fuel cell.
