| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kauffmann, Alexander
Karlsruhe Institute of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (53/53 displayed)
- 2025Strategic alloy design and processing for improved mechanical response in the Mo-Si-Ti systemcitations
- 2024Strategic alloy design and processing for improved mechanical response in the Mo-Si-Ti system
- 2024Creep behavior of a precipitation-strengthened A2-B2 refractory high entropy alloy
- 2024Oxygen-induced decomposition of the body-centered cubic HfNbTaTiZr high-entropy alloy
- 2024Creep behavior and deformation mechanisms of precipitation-strengthened refractory high entropy alloys
- 2024The effect of grain boundaries and precipitates on the mechanical behavior of the refractory compositionally complex alloy NbMoCrTiAlcitations
- 2024Deformation twins as a probe for tribologically induced stress statescitations
- 2023Revisiting analytic shear-lag models for predicting creep in composite materials
- 2023Phase-Field Simulation of the Microstructure Evolution in the Eutectic Alloy NiAl-31Cr-3Mocitations
- 2023Formation and thermal stability of two-phase microstructures in Al-containing refractory compositionally complex alloys
- 2023Nanoscale Oxide Formation at α‐Al<sub>2</sub>O<sub>3</sub>–Nb Interfacescitations
- 2023Deformation twins as a probe for tribologically induced stress states
- 2022Phase Continuity, Brittle to Ductile Transition Temperature, and Creep Behavior of a Eutectic Mo–20Si–52.8Ti Alloycitations
- 2022On the impact of the mesostructure on the creep response of cellular NiAl-Mo eutecticscitations
- 2022Role of orientation relationship for the formation of morphology and preferred orientation in NiAl-(Cr,Mo) during directional solidificationcitations
- 2022High‐Temperature Ternary Oxide Phases in Tantalum/Niobium–Alumina Composite Materialscitations
- 2022Formation and thermal stability of two-phase microstructures in Al-containing refractory compositionally complex alloyscitations
- 2022Revealing the Role of Cross Slip for Serrated Plastic Deformation in Concentrated Solid Solutions at Cryogenic Temperaturescitations
- 2022A novel nitridation- and pesting-resistant Cr-Si-Mo alloycitations
- 2022Pesting Resistance in High Mo Containing Alloys
- 2022High‐temperature ternary oxide phases in Ta/Nb‐Alumina composite materials
- 2022Improved work hardening capability and ductility of an additively manufactured and deformed Al-Mn-Mg-Sc-Zr alloy
- 2021Grain boundary engineering and its implications on corrosion behaviour of equiatomic CoCrFeMnNi high entropy alloycitations
- 2021Influence of Cold Rotary Swaging on Microstructure and Uniaxial Mechanical Behavior in Alloy 718
- 2021Micro-mechanical deformation behavior of CoCrFeMnNi high-entropy alloycitations
- 2021The Creep and Oxidation Behaviour of Pesting-Resistant (Mo,Ti)5Si3-Containing Eutectic-Eutectoid Mo-Si-Ti Alloyscitations
- 2021The Creep and Oxidation Behaviour of Pesting-Resistant $(Mo,Ti)_{5}Si_{3}$-Containing Eutectic-Eutectoid Mo-Si-Ti Alloys
- 2021Influence of Temperature and Plastic Strain on Deformation Mechanisms and Kink Band Formation in Homogenized HfNbTaTiZrcitations
- 2021Superior low-cycle fatigue properties of CoCrNi compared to CoCrFeMnNicitations
- 2021Flexible Powder Production for Additive Manufacturing of Refractory Metal-Based Alloyscitations
- 2021Current Status of Research on the Oxidation Behavior of Refractory High Entropy Alloyscitations
- 2021Deformation mechanisms of CoCrFeMnNi high-entropy alloy under low-cycle-fatigue loadingcitations
- 2020Controlling crystallographic ordering in Mo–Cr–Ti–Al high entropy alloys to enhance ductilitycitations
- 2020Solid solution strengthening and deformation behavior of single-phase Cu-base alloys under tribological loadcitations
- 2020On the chemical and microstructural requirements for the pesting-resistance of Mo-Si-Ti alloyscitations
- 2020Formation of complex intermetallic phases in novel refractory high-entropy alloys NbMoCrTiAl and TaMoCrTiAl: Thermodynamic assessment and experimental validationcitations
- 2020Microstructural changes in CoCrFeMnNi under mild tribological loadcitations
- 2020Characterization of the Microstructure After Composite Peening of Aluminum
- 2020High-temperature low cycle fatigue behavior of an equiatomic CoCrFeMnNi high-entropy alloycitations
- 2020Microstructural investigations of novel high temperature alloys based on NiAl-(Cr,Mo)citations
- 2019On the oxidation mechanism of refractory high entropy alloyscitations
- 2019Characterisation of the oxidation and creep behaviour of novel Mo-Si-Ti alloys
- 2019AuCuNiPdPt as a benchmark for high entropy alloys
- 2019Constitution, oxidation and creep of eutectic and eutectoid Mo-Si-Ti alloyscitations
- 2017Effect of microalloying with silicon on high temperature oxidation resistance of novel refractory high-entropy alloy Ta-Mo-Cr-Ti-Al
- 2017Combinatorial exploration of the high entropy alloy system Co-Cr-Fe-Mn-Nicitations
- 2017Creep of binary Fe-Al alloys with ultrafine lamellar microstructures
- 2017Adaption of metal injection molding to quinary high entropy alloys
- 2017Face Centred Cubic Multi-Component Equiatomic Solid Solutions in the Au-Cu-Ni-Pd-Pt Systemcitations
- 2016Comparison of the microstructure and the mechanical properties of ferritic and austenitic ODS steels
- 2013Grain refinement and deformation mechanisms in room temperature severe plastic deformed Mg-AZ31citations
- 2013Twinning phenomena along and beyond the bain pathcitations
- 2013Processing of intermetallic titanium aluminide wirescitations
Places of action
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article
Nanoscale Oxide Formation at α‐Al<sub>2</sub>O<sub>3</sub>–Nb Interfaces
Abstract
<jats:sec><jats:label /><jats:p>Parts for metallurgical applications made from refractory metal–ceramic composites offer improved thermal shock resistance due to their capability for resistive heating compared to ones made solely from ceramics such as Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>. The combination of Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> and Nb is intriguing as both show similar thermal expansion behavior over a wide temperature range. The high affinity of Nb for O to form nonprotective oxides, however, hampers its use in oxidative environments. Formation of such phases at the ceramic–metal interface can have detrimental effects on the cohesion of the composites. For this work, nanocrystalline Nb films are deposited on sapphire substrates by magnetron sputtering to study diffusion of O and high‐temperature phase formation at a refractory metal–ceramic interface during heat treatment under Ar at 1600 °C. A combined approach of atom probe tomography and transmission electron microscopy for compositional and crystallographic analyses reveals that at triple junctions of the sapphire–Nb interface with Nb grain boundaries, heterogeneous nucleation of nanoscale NbO<jats:sub>2</jats:sub> occurs, which further reacts with Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> to form AlNbO<jats:sub>4</jats:sub>, while the Nb film itself remains metallic. Fast O transport through grain boundaries leads to internal oxidation at the interface, whereas regions further away from Nb grain boundaries remain unchanged.</jats:p></jats:sec>