Abstract
Lattice resolved and quantitative compositional characterizations of the microstructure in TiCrAlN wear resistant coatings emerging at elevated temperatures are performed to address the spinodal decomposition into nanometer-sized coherent cubic TiCr- and Al-rich domains. The domains coarsen during annealing and at 1100 °C, the Al-rich domains include a metastable cubic Al(Cr)N phase containing 9 at. % Cr and a stable hexagonal AlN phase containing less than 1 at. % Cr. The cubic and the hexagonal phases form strained semi-coherent interfaces with each other.
Highlights
Nanostructuring and coherency strain in multicomponent hard coatings
Lattice resolved and quantitative compositional characterizations of the microstructure in TiCrAlN wear resistant coatings emerging at elevated temperatures are performed to address the spinodal decomposition into nanometer-sized coherent cubic TiCr- and Al-rich domains
Upon exposure to elevated temperatures, c-TiAlN coatings undergo iso-structural spinodal decomposition into coherent Ti- and Al-enriched cubic phases.[3,4]. This decomposition process is beneficial since the generated coherency strain in combination with the variation in elastic properties[5] between the phases increases the hardness
Summary
Nanostructuring and coherency strain in multicomponent hard coatings Magnus Odén and Naureen Ghafoor, Nanostructuring and coherency strain in multicomponent hard coatings, 2014, APL MATERIALS, (2), 11610. Lattice resolved and quantitative compositional characterizations of the microstructure in TiCrAlN wear resistant coatings emerging at elevated temperatures are performed to address the spinodal decomposition into nanometer-sized coherent cubic TiCr- and Al-rich domains.
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