Crystallography of phase transitions in metastable titanium aluminium nitride nanocomposites
作者： David Rafaja , Christina Wüstefeld , Milan Dopita , Mykhaylo Motylenko , Carsten Baehtz
DOI: 10.1016/J.SURFCOAT.2014.01.039
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摘要: Abstract The isostructural decomposition of the titanium aluminium nitride supersaturated solid solution crystallising in face centred cubic (fcc) crystal structure into titanium-rich fcc-(Ti,Al)N and almost titanium-free fcc-(Al,Ti)N transformation metastable wurtzitic are discussed from crystallographic point view by taking observed orientation relationships between adjacent phases account. It is shown that Ti-rich thermodynamically stable phase concurrent processes, which controlled not only thermodynamic stability respective compound diffusivity Al Ti, but also local lattice strains. A part strains regarded to result misfit at interfaces nitrides having different [Al]/[Ti] concentration ratios and, case fcc/wurtzite-type interface, structures. transition one was predicted be facilitated stacking faults. results considerations were verified experimentally using situ high-temperature synchrotron diffraction experiments performed on cathodic arc evaporated (Ti,Al)N thin films containing amounts.
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