A5078268568- Solidification and crystal growth phenomena
- Aluminum Alloy Microstructure Properties
- nanoparticles nucleation surface interactions
- Metallurgical Processes and Thermodynamics
- Microstructure and mechanical properties
- Metallurgy and Material Forming
- Intermetallics and Advanced Alloy Properties
- High Temperature Alloys and Creep
- Aluminum Alloys Composites Properties
- Metallic Glasses and Amorphous Alloys
- Advancements in Battery Materials
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Hydrogen Storage and Materials
- Ion-surface interactions and analysis
- Shape Memory Alloy Transformations
- Material Dynamics and Properties
- Microstructure and Mechanical Properties of Steels
- Metal and Thin Film Mechanics
- Catalysts for Methane Reforming
- Electronic Packaging and Soldering Technologies
- Advanced materials and composites
- Additive Manufacturing and 3D Printing Technologies
- Laser Material Processing Techniques
- Magnetic Properties of Alloys
Schott (Germany)
2014-2023
Friedrich Schiller University Jena
2013-2022
Institute of Materials Research of the Slovak Academy of Sciences
2014-2020
Schiller International University
2009-2015
Leibniz Institute for Solid State and Materials Research
2014
FHNW University of Applied Sciences and Arts
2014
BG University Hospital Bergmannsheil Bochum
2014
Helmholtz-Zentrum Hereon
2014
Universität Hamburg
2014
University Medical Center Hamburg-Eppendorf
2014
A universal mechanism that controls the zero thermal expansion (ZTE) behavior of antiperovskite manganese nitrides is discovered. Modulating Mn occupancy at its lattice sites leads to a drastic change in behavior. The site can be reduced by nanostructuring material, generating form “giant” ZTE.
<title/>Melting processes influence the microstructure evolution in metal alloys during casting and heat treatments. Melting is often treated as 'inverse solidification', which only appropriate a limited number of cases. In present article, asymmetry between solidification melting reviewed detail. The current state thermodynamic description under diffusion control outlined. Kinetic aspects that break symmetry solidification are discussed solute partitioning, concentration gradients...
Recent experiments have evidenced sub-nanometer resolution in plasmonic-enhanced probe spectroscopy. Such a high cannot be simply explained using the commonly considered radii of metallic nanoparticles on plasmonic probes. In this contribution effects defects as small single atom found spherical particles acting probing tips are investigated connection with spatial provided. The presence abundant edge and corner sites atomic scale dimensions crystalline is evident from transmission electron...
The basic physical mechanisms of damage formation in semiconductors due to swift heavy ion (SHI) irradiation are not yet fully understood. In the present paper evolution and tracks during SHI InP, InSb, GaAs, GaP, Ge investigated for with Xe or Au ions having specific energies ranging from about 0.8 3 MeV/u. Based on these experimental results those obtained by other authors cluster-ion Ge, Si, extensive calculations were performed framework thermal spike model. As we published previously,...
Laser assisted powder bed fusion of Al-40 wt%Si using ultra-short laser pulses is presented. The effects the pulse duration as well energy on melt pool size, solidification morphology and material properties have been investigated. experiments carried out with a mode-locked fiber system delivering from 500 fs up to 800 ps at wavelength 1030 nm. Comparative investigations performed continuous wave Yb-fiber operating 1070 results show that width reduced shorter durations higher repetition...
Irradiation of single-crystalline InP with swift heavy ions (SHI's) causes the formation ion tracks for certain irradiation temperatures if electronic energy deposition exceeds a threshold value. With increasing SHI fluence, more and are formed, until continuous amorphous layer is produced due to multiple overlapping at high fluences. Single-crystalline samples were irradiated either liquid nitrogen temperature (LNT) or room (RT) Kr, Xe, Au specific energies ranging from ca....
Thermodynamic driving forces and growth rates in rapid solidification are analysed. Taking into account the relaxation time of solute diffusion flux model equations, present theory uses, a first case, deviation from local chemical equilibrium, ergodicity breaking. The second case breaking may exist crystal kinetics rapidly solidifying glass-forming metals alloys. In this theoretical analysis dendritic is given for congruently melting alloys which segregation does not occur. Within theory,...
Abstract Lithium and sodium thiophosphates (and related compounds) have recently attracted attention because of their potential use as solid electrolytes in solid‐state batteries. These compounds, however, exhibit only limited stability practice they react with the electrodes. The decomposition products partially remain redox active hence leading to excess capacity. activity is explicitly used act electrode for sodium‐ion Copper thiophosphate (Cu 3 PS 4 ) a model system. storage behavior...
Results of a study on microstructural evolution eutectic Sn-57 wt.% Bi processed with cooling rates 10 −2 , 1 K s −1 and approximately 5 are presented. In order to distinguish different mechanisms microstructure formation, comparison microstructures hypoeutectic alloys compositions down below the maximum solubility in Sn–Bi is undertaken. It found that at coupled growth occurs, leading lamellar structures length scales. At rapid quenching structure formation alloy qualitatively different....
Superficial amorphization and re-crystallization of silicon in <111> <100> orientation after irradiation by femtosecond laser pulses (790 nm, 30 fs) are studied using optical imaging transmission electron microscopy. Spectroscopic ellipsometry (SIE) allows fast data acquisition at multiple wavelengths provides experimental for calculating nanometric amorphous layer thickness profiles with micrometric lateral resolution based on a thin-film model. For radially Gaussian beam...