A5017778713- Metal and Thin Film Mechanics
- High-pressure geophysics and materials
- Magnetic Properties and Applications
- Surface Treatment and Residual Stress
- High Entropy Alloys Studies
- Crystal Structures and Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Metal Alloys Wear and Properties
- X-ray Diffraction in Crystallography
- Engineering and Materials Science Studies
- Catalytic Processes in Materials Science
- Industrial Gas Emission Control
- Inorganic Chemistry and Materials
- Corrosion Behavior and Inhibition
- Magnetism in coordination complexes
- Microstructure and Mechanical Properties of Steels
- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- Thermal Expansion and Ionic Conductivity
- Metal Forming Simulation Techniques
- Advanced Condensed Matter Physics
- Acoustic Wave Resonator Technologies
- Metal-Organic Frameworks: Synthesis and Applications
- Non-Destructive Testing Techniques
- Luminescence Properties of Advanced Materials
Technical University of Darmstadt
2014-2018
Goethe University Frankfurt
2006-2013
Boreskov Institute of Catalysis
2010
University of Erfurt
2006
The high-pressure behaviour of Bi2Fe4O9 was analysed by in situ powder and single-crystal x-ray diffraction Raman spectroscopy. Pressures up to 34.3(8) GPa were generated using the diamond anvil cell technique. A reversible phase transition is observed at approximately 6.89(6) structure stable 26.3(1) GPa. At higher pressures onset amorphization observed. crystal structures refined from data ambient pressure 4.49(2), 6.46(2), 7.26(2) 9.4(1) isotypic Bi2Ga4O9. lower with respect that Bi2Ga4O9...
Austenitic stainless steels are widely used in medical and food industries because of their excellent corrosion resistance. However, they suffer from weak wear resistance due to low hardness. To improve this, plasma nitriding processes have been successfully applied austenitic steels, thereby forming a thin very hard diffusion layer, the so-called S-phase. In present study, AISI 304L 316L with different microstructures surface modifications were examine influence steel microstructure on...
Abstract The metastable austenitic steels 1.4307 and 1.4404 are characterized by a fcc lattice with paramagnetic properties which can be transformed cold forming to ferromagnetic bcc martensite acicular structures via defect-rich intermediate stage. However, using classical wetchemical etching methods, defects visually not clearly distinguished. Usually, magnetic or X-ray diffraction methods used quantify the fractions. they do allow for imaging phase distribution in microstructure. Even...
Page s203 s203ordering reactions called premartensitic transitions, bcc →B2 and bcc→ DO 3 , on cooling from high temperatures.On further cooling, martensitic transformation occurs by two or more lattice invariant shears a {110}-type plane of austenite matrix basal for martensite together with Bain distortion.Bain distortion consists an expansion 26% parallel to the [001] β axis compression 11% normal this axis, delineated fct unit cell in long range order β-phase undergoes corresponding fcc...
Bi 2 Fe 4 O 9 belongs to the mullite-related compounds M (with = Fe, Al, Ga) [1].It melts incongruently and single crystals were grown from high temperature solutions using top seeded solution growth method (TSSG) [2].Bi has interesting magnetic properties shows a transition at about 264 K paramagnetism antiferromagnetism [3].We are interested in behaviour of stereochemically active 3+ lone electron pair, which exists crystal structure compounds, ambient pressure effect cation substitution...
C 20 H 46 Br 6 Cu 3 N 4 O 9 ,triclinic, P 1 (no.2), a =11.6813(7)Å, b =13.285(1)Å, c =14.719(1) Å, =64.610(9)°, =75.233(6)°, g =74.823(7)°,V =1964.7 Å , Z =2, R gt(F) =0.030, wRref(F 2 ) =0.082, T =293 K. Source of materialEqualamounts betaine monohydrate (C 5 11 NO •H O)and copper dibromide (CuBr )w ere dissolved in pure water under stirring atabout 320 K.Byslow evaporation the solvent at293 K intense violet, black appearing crystals emerged.All starting materials were commercialproducts....