Structual studies in manganese nitride reveal ZTE mechanism
Antiperovskite manganese nitride is a material that features zero
thermal expansion (ZTE) in a limited temperature range. Studies in the
TEM in our research group helped to identify a mechanism that can be
used to tune the ZTE effect in this material. This is documented in a publication in Advanced Materials in October 2011.
Prof. Xiaoyan Song in Jena
Prof. Song from Beijing University of Technology is our guest in Jena
for several weeks in July/August 2011. Investigations in the frame of
several projects on the thermodynamics of nanocrystalline materials are
untertaken, among others some detailed TEM studies on nc-Co-Sm.
Additionally, alloys on the basis of Li will be produced that are to be
structured in Beijing.
Prof. Sarler presents at the IMT colloquium
Prof. Bozidar Sarler from Ljubljana spends some days in Jena in July
2011. The aim of his visit is to continue the collaboration on the
simulation of dendritic growth and to finalize a common paper. He also
gives a talk in the frame of the IMT colloquium on the Point Automata
Method.
Major progress in orientation microscopy in the TEM
Orientation analysis in crystalline samples is frequently carried out
by EBSD analysis. One of the limitations of this technique nowadays is the
spatial resolution that is, material dependent, in the order of 50nm. For
materials with smaller length scales, orientation analysis by nano beam diffraction in the TEM
was further developed in our group. The new technique and first results on grain boundary character in nano-Cu have been
published in ACS Nano in April 2011.
Clarification of the formation of surface structures on NiTi
During metallographic preparation of NiTi alloys, surface layers can
form that look like martensite and are frequently interpreted as
martensite. However, this interpretation is misleading,
in fact the structures are artifacts. The mechanism of their
formation has been identified in extensive studies, and the results are
published in Acta Materialia
Guests of the Metallic Materials Chair in February 2011
Prof. E. Gamsjäger from Montanuniversität Leoben and J. Friedli from
EPF Lausanne visit with our group in February 2011. J. Friedli conducts
experiments on droplet formation in Al alloys, Prof. Gamsjäger
discusses the properties of migrating interfaces.
Meeting on thermodynamic and thermophysical data with a new quality
A 2-day meeting is held in January 2011 in Jena on the acquisition of
data for Al alloys. Five groups in Germany (RWTH Aachen, TU Clausthal,
MPIe Düsseldorf, DLR Cologne and FSU Jena) contribute to data
acquisition with better accuracy, precision and consistency. The
collaboration has already lead to progress both experimentally and
theoretically.
Dr. Möslang in the Physics Colloquium
Dr. Anton Möslang from Karlsruhe Institute of Technology presents his
work in the Physics Colloquium on January 10, 2011. After discussing
with the Metallic Materials department, he will talk on aspects of
materials for the development of the fusion reactor.
Teaching award of Faculty of Physics for Prof. Rettenmayr
The students of the Physics faculty voted that the annual teaching
award of the faculaty should be awarded to Prof. Rettenmayr. As all
members of the research group are involved in the teaching activities,
the award can be taken to go to everybody in the Metallic Materials group.
Prof. Rettenmayr leads the Institute of Materials Science and Technology
In an election of the new director of the Institute of Materials
Science, Prof. Rettenmayr was elected by the members of the institute.
The rector of FSU confirmed the election by appointing him as director
of the institute in November 2010.
Award for PhD thesis
Dr. Andreas Undisz from our group is awarded the STIFT-prize 2010 for
an excellent PhD thesis with the background of a technical application.
STIFT is a foundation that supports applied research in the federal
state of Thuringia.
Prof. Tai is visiting our group
Prof. Tzu-Yao Tai from Sourthern Taiwan University of Technology,
Tainan, is our guest in August 2010. Is research field is
microstructural evolution during resolidification of liquefied layers
on the surface of steels.
Prof. Song guest in Jena
Prof. Xiaoyan Song from Beijing University of
Technology spends a few weeks in our department in July/August 2011.
Goal of the visit is to further develop TEM analysis of nanoscaled
materials and to better understand aspects of thermoyanmics of phase
stability in the presence of a high fraction of grain/phase boundaries.
Prof. Sarler is visiting FSU
Prof. Bozidar Sarler form Ljubljana, Slovenia, visits our group in July
2010. Prof. Sarler is a renowned expert in numerical methods for
simulating phase transformations. He will discuss the modeling of
dendritic growth with a meshless method with us.
Prof. Herlach in the "Physical Colloquium"
Prof. Dieter Herlach, DLR Cologne, presents recent results of his work in the Physics Faculty on May 31, 2010.
Award for best PhD thesis
The thesis entitled "Optimization of structural and functional
properties of NiTi with pseudoelasticity/shape memory for medical
applications" by Andreas Undisz was selected as the best PhD thesis in
the Physics Faculty in 2009.
Award for excellent Diploma thesis
Stephanie Fischer is awarded the STIFT prize 2009 for an excellent
diploma thesis dealing with practically applicable problems.
Three PhD thesis defenses in 2009
With the defense of Uwe Zeigmeister's PhD thesis the 3rd PhD was
completed in 2009. Before him Andreas Undisz and Martin Buchmann
graduated. Congratulation to the graduates! The theses demonstrate the
productive scientific work in our group.
Prof. Schmauder presents his work in the Physics Faculty
Prof. S. Schmauder from Stuttgart University delivers a talk on
Molecular Dynamic Simulations as guest of our group in the frame of
"Physikalisches Kolloquium" on November 2nd, 2009.
Prof. Song is visiting FSU
Prof. X. Song from Beijing University visits our group in August 2009
for discussing thermodynamics and for carrying out advanced TEM studies
on rare earth nano materials.
Poster award for M. Seyring at Metallography conference 2008
The poster “TEM studies on metallic materials at FSU" (M. Seyring,
A. Undisz, U. Zeigmeister, L.-M. Wu, M. Rettenmayr) was awarded
a prize at the Metallography conference.
330 participants at Metallography conference 2008
The 42. Metallography conference was a lively event with varying forms
of presentations and activities. The number of participants was
particularly high, indicating the excellent national and international
reputation of FSU and materials science at FSU.
Dr. Gamsjäger is visiting FSU
Dr. Gamsjäger from Montanuniversität Leoben joins our
group for two weeks in August 2008. Subject of the discussions in this
long term collaboration is the kinetics of solute diffusion in the
vicinity of and through moving interfaces.
Prof. Tai is visiting FSU
Prof. Tzu-Yao Tai from Southern Taiwan University of Technology,
Tainan, visits our department from July to Septermber 2008. Prof. Tai
is an expert in the formation of solidification structures
(‘white layers’) on the surface of steels.
42th Metallography Conference on september 17-19th 2008 in Jena
More information in german are available on
www.dgm.de/dgm/metallographie and as
pdf file.
