A5037260669- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Advanced materials and composites
- Semiconductor materials and devices
- Tribology and Wear Analysis
- Advanced Surface Polishing Techniques
- High-Temperature Coating Behaviors
- Metallurgy and Material Forming
- Metal Forming Simulation Techniques
- Metal Alloys Wear and Properties
- Boron and Carbon Nanomaterials Research
- Advanced machining processes and optimization
- Tribology and Lubrication Engineering
- Lubricants and Their Additives
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Scientific Measurement and Uncertainty Evaluation
- Advanced Sensor Technologies Research
- Advanced Machining and Optimization Techniques
- MXene and MAX Phase Materials
- GaN-based semiconductor devices and materials
- Titanium Alloys Microstructure and Properties
- Adhesion, Friction, and Surface Interactions
- Advanced ceramic materials synthesis
- 2D Materials and Applications
TU Dortmund University
2015-2024
Oerlikon (Germany)
2023-2024
Deutsche Post (Germany)
2020
Forschungsgemeinschaft Werkzeuge und Werkstoffe
2020
Materials Science & Engineering
2016
Magnesium (Mg)-based biomaterials are promising candidates for bone and tissue regeneration. Alloying surface modifications provide effective strategies optimizing tailoring their degradation kinetics. Nevertheless, biocompatibility analyses of Mg-based materials challenging due to its special mechanism with continuous hydrogen release. In this context, the release related (micro-) milieu conditions pretend strictly follow in vitro standards based on ISO 10993-5/-12. Thus, adaptions testing...
Abstract The exceptional stiffness and toughness of double‐network hydrogels (DNHs) offer the possibility to mimic even complex biomaterials, such as cartilage. latter has a limited regenerative capacity thus needs be substituted with an artificial material. DNHs composed cross‐linked poly(2‐oxazoline)s (POx) poly(acrylic acid) (PAA) are synthesized by free radical polymerization in two‐step process. resulting stabilized hydrogen bridges at pH 7.4 (physiological PBS buffer) due pK ‐shifting...
PVD technologies, including vacuum arc evaporation and DC-magnetron sputtering, have been utilized in industrial settings since the early 1980s for depositing protective coatings. These coatings encompass a range of materials such as metal nitrides, carbonitrides, oxides, oxynitrides, DLC, serving diverse applications cutting forming tools, automotive components, decoration. Vacuum generates highly energized ionized particle flux toward substrate, while “classical” gas-ion-dominated direct...
Abstract Micromilling tools face significant challenges in achieving cutting edge preparation by mechanical processes due to their small size. To address these limitations, a new approach for of micro end mills physical vapor deposition (PVD) etching technology is presented. By adapting the strategy, which conventionally used as pre-treatment process PVD clean and condition surface cemented carbide substrate, edges micromilling were successfully modified. The high-energy variation Advanced...
In the metalworking industry, different processes and applications require utilisation of custom designed tools. The selection appropriated substrate material its pre-treatment as well protective coating are great importance in performance life time forming tools, dies, punches coated parts general. TiAlN CrAlN coatings have been deposited onto hot work tool steel AISI H11 by means Direct Current Magnetron Sputtering. Prior to deposition, was modified implementation three pre-treatments:...
The eutectic high entropy alloy Nb0.73CoCrFeNi2.1 was manufactured by means of arc smelting and the obtained ingots were cut into 300-μm-thick foils, which used as filler alloys to braze Crofer 22 APU Hf-metallized yttria-stabilized zirconia (3YSZ). brazing process conducted in a vacuum furnace at 1200 °C for 5 min 4.3·10–4 mbar. In order minimize intense diffusion erosion steel substrate, heating cooling rate 50 K/min applied. Sound joints without any pores or flaws obtained. microstructure...
Titanium alloys, especially β are favorable as implant materials due to their promising combination of low Young's modulus, high strength, corrosion resistance, and biocompatibility. In particular, the moduli reduce risk stress shielding loosening. The processing Ti-24Nb-4Zr-8Sn through laser powder bed fusion is presented. specimens were heat-treated, microstructure was investigated using X-ray diffraction, scanning electron microscopy, transmission microscopy. mechanical properties...
Diamond-like carbon (DLC) coatings deposited on additively manufactured steel greatly improve the tribological properties. However, a high substrate hardness is crucial to sustaining mechanical loads in contact. Herein, heat treatment of binder jet printed 17–4 PH enhances from 24 39 HRC. Binder substrates are coated by DLC types hydrogen-free amorphous (a-C) ∼23 GPa and hydrogenated (a-C:H) ∼20 GPa. The influence tribo-mechanical properties investigated. demonstrates friction wear against...
In biomedical engineering, laser powder bed fusion is an advanced manufacturing technology, which enables, for example, the production of patient-customized implants with complex geometries. Ti-6Al-7Nb shows promising improvements, especially regarding biocompatibility, compared other titanium alloys. The biocompatible features are investigated employing cytocompatibility and antibacterial examinations on Al2O3-blasted untreated surfaces. mechanical properties additively manufactured...