A5007250589- Magnesium Alloys: Properties and Applications
- Corrosion Behavior and Inhibition
- Metal and Thin Film Mechanics
- Aluminum Alloys Composites Properties
- Hydrogen Storage and Materials
- Hydrogen embrittlement and corrosion behaviors in metals
- Concrete Corrosion and Durability
- Diamond and Carbon-based Materials Research
- Layered Double Hydroxides Synthesis and Applications
- Aluminum Alloy Microstructure Properties
- Magnesium Oxide Properties and Applications
- MXene and MAX Phase Materials
- Advancements in Battery Materials
- Advanced battery technologies research
- Numerical methods in engineering
- High-Temperature Coating Behaviors
- Concrete and Cement Materials Research
- Laser Material Processing Techniques
- Machine Learning in Materials Science
- Advanced Surface Polishing Techniques
- Fatigue and fracture mechanics
- Advanced Battery Materials and Technologies
- Non-Destructive Testing Techniques
- Microstructure and Mechanical Properties of Steels
- Supercapacitor Materials and Fabrication
Helmholtz-Zentrum Hereon
2015-2024
Helmut Schmidt University
2018-2022
Philips (United Kingdom)
2015-2020
Max Planck Society
2010-2013
Institute of Materials Research of the Slovak Academy of Sciences
2011
University of Göttingen
2007-2010
L3S Research Center
2010
Universitätsmedizin Göttingen
2008
Abstract Double stimuli‐responsive membranes are prepared by modification of pH‐sensitive integral asymmetric polystyrene‐ b ‐poly(4‐vinylpyridine) (PS‐ ‐P4VP) diblock copolymer with temperature‐responsive poly( N ‐isopropylacrylamide) (pNIPAM) a surface linking reaction. PS‐ ‐P4VP first functionalized mild mussel‐inspired polydopamine coating and then reacted via Michael addition an amine‐terminated pNIPAM‐NH 2 under slightly basic conditions. The thoroughly characterized nuclear magnetic...
This article provides a contribution towards the mechanistic understanding of surface phenomena observed during corrosion Mg-based substrates particularly in low anodic polarization range. The concept considers recent literature explaining cathodic hydrogen evolution from noble acting areas even global polarization. Heavy metal impurities ppm range or intermetallics are always present highly pure magnesium. Their potential effect was investigated here more detail. experimental results...
Severe corrosion of Mg and alloys is a major issue hindering their wider application in transportation industry, medical implants aqueous batteries. Previously, no Mg-based material has been found with significantly lower rate than that ultra-high-purity Mg, i.e. 0.25 mm y-1 concentrated NaCl solution. In this work for the first time, highly corrosion-resistant to be accomplishable by Ca micro-alloying, bringing "stainless Mg" closer. The designed Mg-Ca lean possess incredibly low rates,...
This paper proposes a computational framework to describe the biodegradation of magnesium (Mg)-based bone implants. It is based on sequential combination two models: an electrochemical corrosion model compute mass loss implant over several weeks combined with mechanical assess its residual strength. The first uses peridynamic (PD) tackle complex moving boundary corroding material in efficient manner. results this simulation are mapped finite element (FE) by way damage variable. Subsequently,...
This study focuses on the development of a physico-chemical model based mechanistic and kinetics understanding corrosion process in galvanic couple Ti6Al4V-AA2024. Proposed provides deeper insights at macro level for initiation propagation localized AA2024 galvanically coupled multi-material assemblies. The is able to reveal corrosion, related heterogeneity microstructure, including local pH changes, deposition reaction products, emphasizes important role self-corrosion validation developed...
Aqueous Mg battery technology holds significant appeal, owing to the availability of raw materials, high power densities and possibility fast mechanical recharge. However, batteries have so far been prone decreased capacity due self-corrosion anodes from electrochemical redeposition impurities, such as Fe, which results in parasitic cathodically active sites on discharging anode. This work demonstrates that by adding Fe3+-complexing agents like Tiron or salicylate aqueous electrolyte an...
Mg-air primary battery has become an attractive source of energy due to its economic viability, environmental benignity, and high theoretical specific power density. However, low practical delivered self-corrosion fast anode fouling are the main reasons that limit their commercial application. Modification electrolyte chemistry in batteries plays a crucial role improving performance. In this study, impact addition two strong complexing agents at different concentrations aqueous is...
Oxygen reduction reaction (ORR) has been disclosed in recent studies as a significant secondary cathodic process during magnesium corrosion. This work elaborates on the contribution of ORR to total corrosion pure Mg at different impurity levels NaCl electrolyte with assistance local techniques. A finite element based numerical model taking into account test materials designed this study considering oxygen concentration. Respective computational simulations were calibrated experimental data...
Since the electrolyte composition plays a crucial role in plasma electrolytic oxidation (PEO) coating formation process, systematic and in-depth study was proposed to identify an for fast PEO growth on AA2024 alloy. Different concentration ratios of mixed alkaline electrolytes (hydroxide, silicate phosphate) were investigated. process conducted at low constant current density 50 mA/cm2, which is intended lowering energy consumption. Results demonstrated that breakdown voltage coatings...