Decomposition and phase transformation in TiCrAlN thin coatings
(Color online) X-ray diffractograms of Ti0.31Cr0.07Al0.62N (black) and Ti0.31Cr0.17Al0.52N (red). The upper part contains diffractograms of powder samples heated to 1400 °C (same heating procedure as for DSC). The lower part contains diffractograms obtained from coated WC-Co substrates in as-deposited state and after annealing at temperatures between 800 and 1100 °C.
TEM overview micrographs of Ti0.31Cr0.07Al0.62N in as-deposited state and after annealing at different temperatures for 2 h.
(Color online) Overlaid color-coded EDX maps of Ti0.31Cr0.07Al0.62N obtained after annealing at 800–1100 °C (a)–(d) and a 200 nm EDX line scan measured after annealing at 1100 °C (e).
(Color online) (a) Shows an overview Z-contrast STEM micrograph of Ti0.31Cr0.17Al0.52N annealed at 1100 °C. (b) Contains overlaid color-coded EDX maps and (c) a 100 nm EDX line scan obtained from a region within a grain.
(Color online) (a) TEM micrograph from Ti0.31Cr0.07Al0.62N annealed at 1100 °C for 2 h. Two upper right insets show overlaid color-coded EDX maps of the same area, Al (green), Ti (red), and Cr (blue). The lower right inset (b) shows a lattice-resolved micrograph of Ti0.31Cr0.07Al0.62N annealed at 1000 °C and its Fourier-transform.
(Color online) Nanoindentation measurements from Ti0.33Al0.67N (Ref. 12), Ti0.52Cr0.01Al0.47N, Ti0.31Cr0.07Al0.62N, and Ti0.31Cr0.17Al0.52N of the hardness vs annealing temperature.
(Color online) Thermal responses measured with differential scanning calorimetry of Ti0.31Cr0.17Al0.52N, Ti0.31Cr0.07Al0.62N, Ti0.52Cr0.01Al0.47N, and Ti0.33Al0.67N (Ref. 12) using a heating rate of 20 °C/min. The upper part exhibits the relative mass change (right axis) during the heating for each Cr-containing coating, respectively.
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