Sputtering and Characterization of MAX‐Phase Forming Cr–Al–C and Ti–Al–C Coatings and Their Application on γ‐Based Titanium Aluminides

MAX-phases are of increasing interest as coating material for high temperature applications due to their unique metallic well ceramic properties. Herein, the deposition Cr2AlC and Ti3AlC2 or Ti2AlC MAX-phase forming coatings by magnetron sputtering is demonstrated. Using pure elemental targets, manufacturing with a thickness above 7 μm established. The characterized high-temperature X-ray diffraction (HT-XRD) measurements provide good oxidation behavior development protective thermally grown oxide layers. performance strongly depended on substrate accompanying interdiffusion processes. Therefore, Ti–Al–C favored TiAl alloys thermodynamic stability MAX phase in particular presence γ-TiAl phase. An excellent confirmed up 300 h at 850 °C an alumina layer homogenous coating. degrades after 100 800 processes between carbides nitride phases. Nevertheless, resistance Cr–Al–C-coated alloy given formation MAX-phase.