A5020940408- Electrodeposition and Electroless Coatings
- Corrosion Behavior and Inhibition
- Ionic liquids properties and applications
- Smart Materials for Construction
- Hydrogen embrittlement and corrosion behaviors in metals
- Concrete Corrosion and Durability
- Semiconductor materials and devices
- Electromagnetic Simulation and Numerical Methods
- Aerosol Filtration and Electrostatic Precipitation
- Anodic Oxide Films and Nanostructures
- Chemical and Physical Properties in Aqueous Solutions
- Metal and Thin Film Mechanics
- Chemical Thermodynamics and Molecular Structure
- Composite Material Mechanics
- Electrochemical Analysis and Applications
- Extraction and Separation Processes
- Advanced Antenna and Metasurface Technologies
- ZnO doping and properties
- Electromagnetic wave absorption materials
Chemnitz University of Technology
2016-2023
The electrodeposition of iron-nickel-chromium coatings is a more environmentally friendly and economical alternative to hard-chrome made from chromium (VI) electrolytes stainless-steel bulk materials. aim the study was develop suitable deposition method for thick low-crack Fe-Cr-Ni coatings. Iron-nickel-chromium were electrodeposited using ecological (III) electrolyte with direct current (DC), stepped current, pulse (PC). influence on aging, alloy composition coating, their microstructure...
Fiber-reinforced polymers are increasingly being used, especially in lightweight structures. Here, the effective adaptation of mechanical or physical properties to necessary application manufacturing requirements plays an important role. In this context, alignment reinforcing fibers is often hindered by aspects. To achieve graded locally adjusted different fiber lengths, common technologies such as injection molding compression need be supported external non-mechanical process. Magnetic...
Al–W alloy films were prepared by electrodeposition using anhydrous 1-ethyl-3-methylimidazolium chloride (EMIMCl) ionic-liquid solution with aluminium in a ratio of 1:1.5. As commercially available tungsten precursor, hexachloride was used. The metal is dissolved the ionic liquid at concentrations up to 0.06 mol/l. deposition took place outside glove box continuous argon stream over electrolyte temperature 60 °C current density 1 A/m2. Resulting alloys show content higher than 20 wt% (3.5...
Thick Cu−Sn alloy layers were produced in an [EMIM]Cl ionic-liquid solution from CuCl2 and SnCl2 different ratios. All work, including the electrodeposition, took place outside glovebox with a continuous argon stream over electrolyte at 95 °C. The layer composition thickness can be adjusted by variation of metal-salts content electrolyte. A up to 15 µm copper ωCu = 0.86 was obtained. phase characterized scanning electron microscopy (SEM), X-ray diffraction (XRD), fluorescence (XRF)....
The anodic oxidation process is commonly used to refine the surface of aluminium and its alloys. Compared substrate, alumina layers produced by anodising exhibit an increased hardness chemical resistance. Thus, corrosion wear resistance are generally improved. coatings also electrically isolating may serve decorative purposes. Applying a time-variant, dynamic electrical control pulse-current or current-steps promising approach improve coating properties, which partially deployed in...
Thermodynamic equilibria and concentrations in thermodynamic are of major importance chemistry, chemical engineering, physical medicine etc. due to a vast spectrum applications. E.g., play central role for the estimation drug delivery, produced mass products reactions, deposited metal during electro plating many more. Species equilibrium determined by system reactions reactions’ associated stability constants. In applications constants need be determined. The usual way determine is evaluate...
This study shows the electrodeposition of Fe-Cr-Ni alloys using advantages a stepped direct-current deposition in Cr(III)-containing electrolyte, and its influence on pH value. The resulting coatings are uniform free microcracks, with Cr content around 30% thicknesses above 10 µm. current mode (direct current, direct pulsed current) development is investigated correlated arising microstructure alloy composition. Considering flow, it can be stated that pauses interrupt high overvoltage...
Abstract Fiber-reinforced composites are progressively more used in a variety of industrial applications. In recent years, carbon fiber-reinforced plastics have become increasingly popular, particularly the aerospace sector because they offer outstanding mechanical properties combined with low weight. However, orientation and distribution fibers significant effect on physical composite materials. Using conventional manufacturing technologies, it is not always technologically possible to...
Abstract The electroplating of iron-chromium and iron-nickel-chromium layers is an economic alternative to mild steel hard-chrome from chromium (VI) electrolytes. Iron-chromium were electrodeposited using environment friendly (III) electrolyte. heat-treated at different temperatures (150 °C, 300 450 °C 600 °C) in order determine the temperature which recrystallization takes place, phases are formed study influence on element content. phase analysis was conducted by X-ray diffraction,...
Ag–W two-phase system was prepared by electrodeposition using anhydrous 1-ethyl-3-methylimidazolium chloride [EMIm]Cl ionic-liquid (IL) solution with AlCl3 in different ratios. The deposition took place outside the glove box a continuous Ar stream over electrolyte at 120 °C and pulsed-like current regime. Resultant layers show areas of Ag W an overall content mass fraction w = 50% (mole x 36.9%). phase composition observed X-ray diffraction, chemical characterized scanning electron...
Abstract Within this work, an entirely new electrolyte system for the electrochemical deposition of REACh-compliant Zn-W and Zn-W-Cu alloy layers was developed based on thermodynamic calculations. The required constants complex formation were determined using potentiometric titrations. analyzed with regard to layer microstructure (including coating thickness, chemical phase composition), optical properties gloss color) passivation corrosion behaviors. Zn, Zn-W, are characterized by a...
The global e-mobility market is experiencing strong growth. As a driving force, China increased its share of electric vehicles by nearly 400% from 0.3 million in 2015 to 1.25 2018. increase registrations the US shows similar percentage, 0.14 0.36 last five years. Within twenty years, may account for 45 percent total car sales worldwide. In automotive industry, present motor performance along with steady suggests using very powerful motors with, at least temporary, high power consumption. For...