V. Klemm

TU Bergakademie Freiberg

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

David Rafaja

TU Bergakademie Freiberg

Gerhard Schreiber

Helmut Schmidt University

D. Heger

TU Bergakademie Freiberg

Milan Dopita

Charles University

Christina Wüstefeld

TU Bergakademie Freiberg

Mario J. Kriegel

TU Bergakademie Freiberg

P. Klimanek

TU Bergakademie Freiberg

J. Heitmann

TU Bergakademie Freiberg

Mykhaylo Motylenko

TU Bergakademie Freiberg

F. Schneider

Fraunhofer Institute for Laser Technology

Cooperative Institutions

TU Bergakademie Freiberg

151

Max-Planck-Institut für Nachhaltige Materialien

Institute of Metallurgy

John Wiley & Sons (Germany)

VDEh-Betriebsforschungsinstitut

Jernkontoret (Sweden)

TU Dresden

Chinese Society for Electrical Engineering

Leibniz Institute for Solid State and Materials Research

Max Planck Society

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Disclinations in Plastically Deformed Metallic Materials

Advanced Engineering Materials (2001)

P. Klimanek V. Klemm А. Е. Романов Marc Seefeldt

Cold-working of metallic materials up to large strains is usually characterised by simultaneous substructure evolution on different length scales and accompanied by the formation of significant lattice rotations. A promising tool for the description of such microstructure development is the concept of partial disclinations. Transmission electron microscopy (TEM) studies illustrate clearly, that defects of this kind are frequently existent in cold-worked metals and have to be accepted as an important defect entity in the substructure evolution at larger strains. Moreover, it is shown that substructure modelling on the base of a coupled dislocation-disclination dynamics leads to satisfying correspondence of calculated substructure characteristics with experimental results obtained by TEM, X-ray diffractometry, and EBSD (electron backscattering diffraction), and to a satisfying prediction of the macroscopic deformation behaviour, i.e., especially the transition from stage III to stage IV of crystal plasticity.

10.1002/1527-2648(200111)3:11<877::aid-adem877>3.0.co;2-l

Cite

Citations (41)

Adhesion of silver nanoparticles on the montmorillonite surface

Journal of Physics and Chemistry of Solids (2009)

Jonáš Tokarský Pavla Čapková V. Klemm David Rafaja Jana Kukutschová

Silver nanoparticle

Thermal Stability

10.1016/j.jpcs.2009.12.055

Cite

Citations (12)

A Microdiffraction Method for the Characterization of Partial Disclinations in Plastically Deformed Metals by TEM

physica status solidi (a) (1999)

V. Klemm P. Klimanek Marc Seefeldt

The disclination concept can be used to describe rotational substructures developing under large-strain deformation of crystalline metals. The paper presents a TEM microdiffraction method using local misorientation measurements which allows the identification of disclinations. Copper single as well as polycrystals rolled down to 50% and 70% thickness reduction at room temperature were investigated and partial disclinations were found in triple junctions of cell-block boundaries. The power of the partial disclinations lies in the range of 1.5° to 2°, in agreement with theoretical expectations.

Misorientation

Disclination

Characterization

10.1002/(sici)1521-396x(199910)175:2<569::aid-pssa569>3.0.co;2-s

Cite

Citations (18)

Identification of disclinations in the structure of strongly deformed materialsIdentification de désinclinaisons dans la structure des matériaux fortement déformés

Annales de Chimie Science des Matériaux (2002)

V. Klemm P. Klimanek A. L. Kolesnikova Mikhailo Motylenko Alexei E. Romanov

The deformation of metallic materials up to large strains leads to the formation of fine grain structures (down to the nanometric scale) with high densities of grain boundaries and grain boundary junctions. Such structures demonstrate significant lattice rotations and the presence of disclination defects at grain boundary junctions. We present the results of transmission electron microscopy (TEM) observations of disclinations in strongly deformed metals and describe the theoretical approaches for their identification.

Disclination

Lattice (music)

Source

Cite

Citations (0)

Core/shell CdS/ZnS nanoparticles: Molecular modelling and characterization by photocatalytic decomposition of Methylene Blue

Applied Surface Science (2013)

Petr Praus Ladislav Svoboda Jonáš Tokarský A. Hospodková V. Klemm

Nanorod

Methylene blue

10.1016/j.apsusc.2013.12.055

Cite

Citations (20)

Adhesion of silver nanoparticles on the clay substrates; modeling and experiment

Applied Surface Science (2009)

Jonáš Tokarský Pavla Čapková David Rafaja V. Klemm Marta Valášková

Silver nanoparticle

10.1016/j.apsusc.2009.11.037

Cite

Citations (22)

Analysis of local composition gradients in the hard-phase grains of cermets using a combination of X-ray diffraction and electron microscopy

International Journal of Refractory Metals and Hard Materials (2007)

David Rafaja Milan Dopita M. Masimov V. Klemm Nina Wendt

Cermet

10.1016/j.ijrmhm.2007.03.004

Cite

Citations (10)

Erbium-doped slot waveguides containing size-controlled silicon nanocrystals

Journal of Applied Physics (2015)

Raik Hoffmann Jan Beyer V. Klemm David Rafaja Brett C. Johnson

Silicon based slot waveguides with a slot containing Si nanocrystals (Si-nc) and Erbium ions (Er3+) inside a silica matrix were prepared using sputter deposition and low-energy ion implantation. This sequence enabled independent optimization of nanocrystal formation and Er3+ incorporation parameters. Using a superlattice approach, the size of the Si-nc inside the slot could be controlled and optimized for maximum Er3+ luminescence yield at 1.54 μm. Er3+ is found to be efficiently pumped by Si-nc of sizes around 3 to 4 nm. Increasing Er3+ photoluminescence at 1.54 μm with increasing post-implantation annealing temperatures up to 1000 °C is attributed to annealing of matrix or Si-nc interface defects mainly. Additionally, a dependence of the Er3+ luminescence intensity on both the excitation and emission linear polarization orientation is shown, which demonstrates efficient field enhancement in sputtered slot waveguide structures.

Erbium

10.1063/1.4919420

Cite

Citations (3)

Small angle scattering experiments on annealed gallium arsenide single crystal wafers

Martin Herms G. Goperigk V. Klemm G. Meier G. Zychowitz

The minimum concentration of excess atoms precipitated in GaAs and InP being necessary to cause observable small angle scattering of X-rays and neutrons (SAXS and SANS, respectively) was estimated. Consequently, undoped melt-grown GaAs wafers were annealed at high arsenic pressure. Areas of a strongly increased density of precipitate were localized by transmission electron microscopy. SAXS experiments have revealed a very weak intensity being dependent on energy at values of the scattering vector Q>0.02 /spl Aring//sup -1/. Different annealing procedures have resulted in distinguishable curves of SANS (Q<0.03 /spl Aring//sup -1/) in dependence on temperature and arsenic pressure.

Small-angle X-ray scattering

Small-Angle Scattering

Crystal (programming language)

10.1109/sim.1998.785098

Cite

Citations (0)

Temperature stable Au nanoparticles embedded in Er3+ doped ZrO2 sol–gel thin films prepared by spin coating

Thin Solid Films (2016)

Sarah Seidel A. Sabelfeld Ralph Strohmeyer Gerhard Schreiber V. Klemm

Spin Coating

10.1016/j.tsf.2016.03.028

Cite

Citations (5)