CVD nanocrystalline diamond coatings on Ti alloy: A synchrotron-assisted interfacial investigation

► Adherent nanocrystalline diamond coating has been deposited on Ti alloy at low temperature. ► The diamond coating, coating/substrate interface and the underlying substrate are comprehensively investigated. ► Synchrotron X-ray Laue diffraction is used to track the in-depth substrate microstructure changes. ► Low H2 concentration and deposition temperature are sued to mitigate substrate damage.