Spinodal decomposition of cubic Ti1−xAlxN: Comparison between experiments and modeling
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Paul H. Mayrhofer
Abstract
Annealing of cubic (c) Ti1−xAlxN, possessing NaCl structure, leads to decomposition into the stable constituents c-TiN and hexagonal (h) AlN (ZnS wurtzite structure) via the formation of metastable c-TiN rich and metastable c-AlN rich phases. In this paper, we describe the influence of sizes of the newly formed particles and strain energy due to their different lattice parameter and elastic constants with respect to the remaining matrix on decomposition processes and energetics. Good agreement between the enthalpy output obtained from differential scanning calorimetry and values derived from ab-initio and continuum mechanical based calculations for the decomposition and transformation processes occurring is obtained. Based on the comparison between experiments including X-ray diffraction and small-angle neutron scattering of annealed samples and modeling we can conclude that spinodal decomposition is present in c-Ti1−xAlxN coatings with x = 0.50 and 0.66, whereas the alloy with x = 0.25 is outside the spinodal.
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© 2007, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Professor Dr. phil. Dr. techn. e. h. Hellmut F. Fischmeister
- Basic
- Compressive deformation of lamellar microstructures – a short review
- Influence of external and internal length scale on the flow stress of copper
- Spinodal decomposition of cubic Ti1−xAlxN: Comparison between experiments and modeling
- Combined ab-initio and N-K, Ti-L2,3, V-L2,3 electron energy-loss near edge structure studies for TiN and VN films
- Gold-enhanced oxidation of silicon nanowires
- Numerical determination of parameterised failure curves for ductile structural materials
- Relaxation of semiconductor nanostructures using molecular dynamics with analytic bond order potentials*
- Examination of phase transformations in the system Fe–N–C by means of nitrocarburising reactions and secondary annealing experiments; the α + ∊ two-phase equilibrium
- Applied
- On the evolution of secondary hardening carbides in a high-speed steel characterised by APFIM and SANS
- Silicon nitride tools for hot rolling of high-alloyed steel and superalloy wires – load analysis and first practical tests
- Development of the unloading stiffness during cyclic plastic deformation of a high-strength aluminium alloy in different tempers
- Enhanced thermal stability of a cobalt–boron carbide nanocomposite by ion-implantation
- Experimental studies and thermodynamic simulation of phase transformations in high Nb containing γ-TiAl based alloys
- Kinetics of nanoscale structure development during Mg-vapour reduction of tantalum oxide
- On the interaction of ductile damage and materials softening of a Ni-base alloy during hot deformation
- Adhesive contact between flat punches with finite edge radius and an elastic half-space
- Notifications
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Professor Dr. phil. Dr. techn. e. h. Hellmut F. Fischmeister
- Basic
- Compressive deformation of lamellar microstructures – a short review
- Influence of external and internal length scale on the flow stress of copper
- Spinodal decomposition of cubic Ti1−xAlxN: Comparison between experiments and modeling
- Combined ab-initio and N-K, Ti-L2,3, V-L2,3 electron energy-loss near edge structure studies for TiN and VN films
- Gold-enhanced oxidation of silicon nanowires
- Numerical determination of parameterised failure curves for ductile structural materials
- Relaxation of semiconductor nanostructures using molecular dynamics with analytic bond order potentials*
- Examination of phase transformations in the system Fe–N–C by means of nitrocarburising reactions and secondary annealing experiments; the α + ∊ two-phase equilibrium
- Applied
- On the evolution of secondary hardening carbides in a high-speed steel characterised by APFIM and SANS
- Silicon nitride tools for hot rolling of high-alloyed steel and superalloy wires – load analysis and first practical tests
- Development of the unloading stiffness during cyclic plastic deformation of a high-strength aluminium alloy in different tempers
- Enhanced thermal stability of a cobalt–boron carbide nanocomposite by ion-implantation
- Experimental studies and thermodynamic simulation of phase transformations in high Nb containing γ-TiAl based alloys
- Kinetics of nanoscale structure development during Mg-vapour reduction of tantalum oxide
- On the interaction of ductile damage and materials softening of a Ni-base alloy during hot deformation
- Adhesive contact between flat punches with finite edge radius and an elastic half-space
- Notifications
- DGM News
