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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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Reinhard, Christina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (30/30 displayed)
- 2024Microscale stress-geometry interactions in an additively manufactured NiTi cardiovascular stent:A synchrotron dual imaging tomography and diffraction studycitations
- 2022Mechanical characterisation of V-4Cr-4Ti alloy:Tensile tests under high energy synchrotron diffractioncitations
- 2022Mechanical characterisation of V-4Cr-4Ti alloycitations
- 2022The effects of internal stresses on the creep deformation investigated using in-situ synchrotron diffraction and crystal plasticity modellingcitations
- 2022Investigating the mechanical behaviour of Fukushima MCCI using synchrotron Xray tomography and digital volume correlationcitations
- 2021In-situ Measurements of Stress During Thermal Shock in Clad Pressure Vessel Steel Using Synchrotron X-ray Diffractioncitations
- 2019Influence of microstructure on the corrosion of archaeological iron observed using 3D synchrotron micro-tomographycitations
- 2019Effect of Plasticity on Creep Deformation in Type 316h Stainless Steel
- 2018In-situ synchrotron X-ray radiography observation of primary Al2Cu intermetallic growth on fragments of aluminium oxide filmcitations
- 2018Validating 3D two-parameter fracture mechanics for structural integrity assessmentscitations
- 2018Measurements of Stress During Thermal Shock in Clad Reactor Pressure Vessel Material Using Time-resolved In-situ Synchrotron X-ray Diffraction
- 2018Measurements of stress during thermal shock in clad reactor pressure vessel material using time-resolved in-situ synchrotron X-ray diffractioncitations
- 2017In-situ synchrotron X-ray radiography observation of primary Al2Cu intermetallic growth on fragments of aluminium oxide filmcitations
- 2017A synchrotron X-radiography study of the fragmentation and refinement of primary intermetallic particles in an Al-35 Cu alloy induced by ultrasonic melt processingcitations
- 2016Observation and simulation of indentation damage in a SiC-SiC fibre ceramic matrix compositecitations
- 2016Observation and simulation of indentation damage in a SiC-SiCfibre ceramic matrix compositecitations
- 2016Simultaneous Differential Scanning Calorimetry-Synchrotron X-ray Powder Diffractioncitations
- 2015Structure-morphology correlation in electrospun fibers of semicrystalline polymers by simultaneous synchrotron SAXS-WAXDcitations
- 2015Electric-Field-Induced Domain Switching and Domain Texture Relaxations in Bulk Bismuth Ferritecitations
- 2015Yield behaviour beneath hardness indentations in ductile metals, measured by three-dimensional computed X-ray tomography and digital volume correlationcitations
- 2014In-situ investigation of microcrack formation and strains in Ag-Cu-based multi-metal matrix composites analysed by synchrotron radiationcitations
- 2014Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approachcitations
- 2014Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach (vol 115, 124108, 2014)citations
- 2013Residual stresses in Linear Friction Welding of aluminium alloyscitations
- 2010Electron energy loss spectroscopy of nano-scale CrAlYN/CrN-CrAlY(O)N/Cr(O)N multilayer coatings deposited by unbalanced magnetron sputteringcitations
- 2009Influence of the bias voltage on the structure and mechanical performance of nanoscale multilayer CrAlYN/CrN physical vapor deposition coatingscitations
- 2009High temperature tribological performance of CrAlYN/CrN nanoscale multilayer coatings deposited on γ-TiAlcitations
- 2007CrN/NbN superlattice structured coatings with enhanced corrosion resistance achieved by high power impulse magnetron sputtering interface pre-treatmentcitations
- 2007Oxidation Behaviour of Nanoscale Multilayer CrAlYN/CrN Coatings Deposited by the Combined High Power Impulse Magnetron Sputtering/Unbalanced Magnetron Sputtering Techniquecitations
- 2006CrAlYN/CrN superlattice coatings deposited by the combined high power impulse magnetron sputtering/unbalanced magnetron sputtering techniquecitations
Places of action
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article
CrN/NbN superlattice structured coatings with enhanced corrosion resistance achieved by high power impulse magnetron sputtering interface pre-treatment
Abstract
In physical vapour deposition the ion etching pre-treatment prior to thin film deposition strongly influences the substrate/coating interface structure and chemistry and consequently properties such as adhesion and corrosion performance. This study compares CrN/NbN superlattice coatings grown by unbalanced magnetron sputtering on 304L stainless steel (SS) and M2 high speed steel (HSS) pre-treated with Nb ions at bias voltages of − 600 V with three different methods: (1) high power impulse magnetron sputtering (HIPIMS), (2) HIPIMS with subsequent Nb HIPIMS interlayer deposition and (3) steered cathodic arc (CA) metal ion etching with CA interlayer deposition.<br/><br/>The discharge during the pre-treatment step was analysed by optical emission spectroscopy of the Nb plasma, revealing a HIPIMS plasma dominated by singly charged Nb1+ ions. Two-fold charged Nb2+ ions were also present.<br/><br/>HIPIMS pre-treatment promoted the formation of a clean and droplet-free interface and growth-defect free and dense coatings. Localized epitaxial growth of the films, as examined by cross-sectional transmission electron microscopy, resulted in significantly improved coating adhesion (LC = 56 N) compared to CA pre-treatment (LC = 45 N). The introduction of a 30 nm thick Nb metal interlayer resulted in clearly defined and sharp interfaces with coherent base layer growth further improving the adhesion (LC = 65 N).<br/><br/>Furthermore, the corrosion performance was studied by potentiodynamic polarisation in 3% NaCl solution. Results show superior corrosion performance for the HIPIMS pre-treated coatings. The HIPIMS pre-treatment prior to coating deposition provided passivation up to + 1000 mV on 304 stainless steel (SS) substrates. An additional Nb interlayer significantly enhanced the corrosion performance with lower current densities of 4 × 10− 5 A cm− 2. CrN/NbN superlattice structured coatings were also sufficient to effectively protect non-noble M2 high speed steel (HSS) substrates. However, passivation is only retained up to potentials of + 660 mV. The substrate/coating system corroded unimpeded when exceeding these values. The CrN/NbN coating with CA etch did not show passivation on both SS and HSS. CrN/NbN nanoscale multilayer coatings both with HIPIMS and CA pre-treatment outperform 20 μm thick commercial electroplated hard chrome with the HIPIMS pre-treated coatings being superior to the CA pre-treated ones.