Abstract
Physical vapour deposition (PVD) of thin hard coatings on TiN basis is usually performed at rather low temperatures (TD < 500 °C) far from thermal equilibrium, which leads to high intrinsic residual stresses in the growing film. In contrast to the extrinsic thermal residual stresses which can easily be estimated from the difference of the coefficients of thermal expansion between the substrate and the coating, a theoretical prediction of the intrinsic residual stresses is difficult, because their amount as well as their distribution within the film depend in a very complex way on the deposition kinetics. By the example of strongly fibre-textured PVD (Ti, Cr)N coatings which have been prepared under defined variation of the deposition parameters in order to adjust the residual stress distribution within the coatings, the paper compares different X-ray diffraction techniques with respect to their applicability for detecting residual stresses which are non-uniform over the coating thickness.
Abstract
Die physikalische Gasphasenabscheidung (PVD) von dünnen Hartstoffschichten auf TiN- Basis erfolgt üblicherweise bei vergleichsweise niedrigen Temperaturen (TD < 500 °C) fernab vom thermischen Gleichgewicht und führt damit zu hohen intrinsischen Eigenspannungen in der wachsenden Schicht. Im Gegensatz zu den extrinsischen thermischen Eigenspannungen, die sich in einfacher Weise aus der Differenz der thermischen Ausdehnungskoeffizienten von Schicht und Substrat abschätzen lassen, gestaltet sich eine theoretische Voraussage der intrinsischen Eigenspannungsanteile schwierig, da sie sowohl hinsichtlich ihrer Höhe als auch ihrer Verteilung in der Schicht in komplexer Weise von der Wachstumskinetik abhängen. Am Beispiel von PVD-(Ti, Cr)N-Schichten mit starker Fasertextur, bei denen die Abscheidebedingungen gezielt variiert wurden, um die Eigenspannungsverteilung innerhalb der Schicht definiert einzustellen, werden verschiedene röntgenographische Messtechniken bezüglich ihrer Eignung für den Nachweis inhomogener Eigenspannungsverteilungen innerhalb der Schichten miteinander verglichen.
Dedicated to Professor Dr. Otmar Vöhringer on the occasion of his 65th birthday
The authors are indebted to the German Research Foundation (DFG) for financial support of the investigations, reference numbers Re 688/36-1 and Uh 100/17-1.
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© 2003 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Bedeutung von Eigenspannungsabbau und mikrostrukturellen Veränderungen für die Lebensdauervorhersage schwingbeanspruchter Schweißverbindungen
- Factors affecting cyclic lifetime of EB-PVD thermal barrier coatings with various bond coats
- Depth-resolved X-ray residual stress analysis in PVD (Ti, Cr) N hard coatings
- Crystal orientation and residual stress in TiN film by synchrotron radiation
- Characterization of thermal and anodic oxide layers on β- and on near-β-titanium alloys for biomedical application
- Micromechanisms and modelling of crack initiation and growth in tool steels: role of primary carbides
- Fatigue crack nucleation at grain boundaries – experiment and simulation
- Fatigue and fracture-induced defect structures of metals investigated by positron microscopy
- Deformation and fracture of Nb/α-Al2O3 composites in compression and bending studied by optical methods
- Dislocation microstructures of single crystal ⟨001⟩ CMSX-4 specimens tensile tested at 700 and 1000°C
- Influence of mechanical surface treatments on the HCF performance of the Ni-superalloy Udimet 720 LI
- Precipitation of β-phase and twinning during deformation of Mg–Al alloy AZ91 at 150 °C after solution treatment
- Nanograin size, high-nitrogen austenitic stainless steels
- Der dynamische SD-Effekt und der Einfluss auf die Fließortkurve
- Einfluss der Umformgeschwindigkeit und -temperatur auf das Fließverhalten metallischer Werkstoffe
- Mean stress sensitivity of sintered iron and steel
- Thermozyklisches Kriechen einer kurzfaserverstärkten Aluminium-Kolbenlegierung
- Strength and ductility of thin Cu wires
- Modeling of deformation behavior of copper under equal channel angular pressing
- Reaktionssintern von AlMg–MgO zur Herstellung von Bauteilen auf Spinellbasis
- Determination of the local oxygen distribution in a commercial titanium alloy by 3-dimensional atom probe
- Phase diagram of the Al–Cu–Fe quasicrystal-forming alloy system
- Notifications/Mitteilungen
- Personal/Personelles
- Books/Bücher
- Conferences/Konferenzen
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Bedeutung von Eigenspannungsabbau und mikrostrukturellen Veränderungen für die Lebensdauervorhersage schwingbeanspruchter Schweißverbindungen
- Factors affecting cyclic lifetime of EB-PVD thermal barrier coatings with various bond coats
- Depth-resolved X-ray residual stress analysis in PVD (Ti, Cr) N hard coatings
- Crystal orientation and residual stress in TiN film by synchrotron radiation
- Characterization of thermal and anodic oxide layers on β- and on near-β-titanium alloys for biomedical application
- Micromechanisms and modelling of crack initiation and growth in tool steels: role of primary carbides
- Fatigue crack nucleation at grain boundaries – experiment and simulation
- Fatigue and fracture-induced defect structures of metals investigated by positron microscopy
- Deformation and fracture of Nb/α-Al2O3 composites in compression and bending studied by optical methods
- Dislocation microstructures of single crystal ⟨001⟩ CMSX-4 specimens tensile tested at 700 and 1000°C
- Influence of mechanical surface treatments on the HCF performance of the Ni-superalloy Udimet 720 LI
- Precipitation of β-phase and twinning during deformation of Mg–Al alloy AZ91 at 150 °C after solution treatment
- Nanograin size, high-nitrogen austenitic stainless steels
- Der dynamische SD-Effekt und der Einfluss auf die Fließortkurve
- Einfluss der Umformgeschwindigkeit und -temperatur auf das Fließverhalten metallischer Werkstoffe
- Mean stress sensitivity of sintered iron and steel
- Thermozyklisches Kriechen einer kurzfaserverstärkten Aluminium-Kolbenlegierung
- Strength and ductility of thin Cu wires
- Modeling of deformation behavior of copper under equal channel angular pressing
- Reaktionssintern von AlMg–MgO zur Herstellung von Bauteilen auf Spinellbasis
- Determination of the local oxygen distribution in a commercial titanium alloy by 3-dimensional atom probe
- Phase diagram of the Al–Cu–Fe quasicrystal-forming alloy system
- Notifications/Mitteilungen
- Personal/Personelles
- Books/Bücher
- Conferences/Konferenzen