Westfälische Wilhelms-Universität Münster
Forschungsbericht 2001-2002
 
Institut für Materialphysik

Wilhelm-Klemm-Str. 10
48149 Münster
Geschäftsführender Direktor: Prof. Dr. Helmut Mehrer
 
Tel. (0251) 83-33571
Fax: (0251) 83-38346
e-mail: mehrer@nwz.uni-muenster.de
www: http://www.uni-muenster.de/Physik/MP/
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[Pfeile  braun]

Forschungsschwerpunkte 2001 - 2002

Fachbereich 11 - Physik
Institut für Materialphysik

  The academic staff of the Institut für Materialphysik currently comprises two professors (Prof. Dr. H. Mehrer, Prof. Dr. G. Schmitz), two assistant professors (Hochschuldozent Dr. H. Bracht, Privatdozent Dr. N.A. Stolwijk), and two emeriti (Prof. a. D. Dr. Chr. Herzig, Prof. a. D. Dr. E. Nembach). The service staff including secretaries, laboratory technicians, electronic and mechanical workshop members amounts to eleven permanent employees. Furthermore, presently six postdoctoral fellows and scientific guests are members of the institute. In addition about twenty graduate students (diploma and doctoral degree) are working in the laboratories of the institute. Some of them are teaching assistants supported by funds of the institute, most of them are supported by research grants.

Research projects at the Institut für Materialphysik are usually carried out by small groups or by individuals supervised by one of the professors. A substantial part of the research activities is pursued by graduate students within time-limited research grants during their dissertation. Research projects often require cooperations with groups at our own university, at other universities in Germany and abroad, and at national or international research centers.

The service facilities of the institute include a mechanical and an electronic workshop. The institute is equipped with various facilities for teaching and research in the area of materials science. We mention some of the more important examples: well equipped laboratories for work with radioisotopes in diffusion research, various detection facilities for radionuclides, mechanical and sputtering devices for depth profiling, electron microprobe analyser, analytical transmission electron microscope, precision ion mill for cross section preperation, X-ray facilities including powder diffractometer, Laue- and Debye-Scherrer camera, optical metallography, spark erosion facilities, a variety of high-temperature furnaces for melting materials, for growing single-crystals, and for annealing, UHV sputter chamber for thin film deposition, tensile testing machine, spreading resistance devices and an electrochemical capacitance-voltage device for depth profiling of doping elements in semiconductors, deep level transient spectroscopy for semiconductors, impedance spectroscopy for ion conducting materials, high pressure cell for pressures up to 0.8 GPa.

In January 2000 a Sonderforschungsbereich (SFB 458) was established by the Deutsche Forschungsgemeinschaft at the Westfälische Wilhelms-Universität Münster and granted for a further funding period (2003 - 2005) in autumn 2002. In close cooperation, research groups from the Faculty of Natural Sciences coordinate their efforts towards the topic "Ionic motion in materials with disordered structures". The aim of the Sonderforschungsbereich is a better understanding of ionic motion from the elementary jump process of ions up to their macroscopic transport properties. Presently, the Institut für Materialphysik contributes three research projects in the areas of ion-conducting glasses and polymer electrolytes to the program of the Sonderforschungsbereich.

 A  Diffusion in Metals, Intermetallics, Silicides, Quasicrystals and Metallic Glasses
   1      Review on diffusion in metals and alloys
   2      Diffusion Al-Fe intermetallics
   3      Diffusion in Al-Ti intermetallics
   4      Diffusion in Silicides
   5      Diffusion in binary Al-Ni and ternary Al-Ni-Fe intermetallic compounds
   6      Diffusion in bulk metallic glasses and supercooled melts
   7      Diffusion quasicrystalline alloys
   8      Multiphase diffusion in binary Al-Mg alloys
 B  Diffusion and Segregation in Grain and Interphase Boundaries
   1      Solute diffusion and segregation in grain boundaries of copper and silver
   2      Interface diffusion in intermetallics
   3      Diffusion and segregation in nanocrystalline Fe-Ni alloys
 C  Diffusion and Defects in Elementary and Compound Semiconductors
   1      Data compilation on solubility and segregation of impurities in Ge and Si
   2      Atomic mechanisms of mass transport in elemental and compound semiconductors
   3      Electrical characterisation of impurities and defects in semiconductors
   4      Iridium diffusion in silicon
   5      Impact of high boron doping levels and oxygen concentrations on the diffusion of gold in silicon
   6      Radiation enhanced diffusion in silicon
   7      Interference between self- and dopant diffusion in silicon isotope multilayer structures
   8      Solute and self-diffusion in epilayers and isotope heterostructures of silicon carbide (SiC)
   9      Mechanisms of dopant diffusion in gallium arsenide and gallium antimonide
   10      Interdiffusion in GaSb/AlxGa1-xSb heterostructures
   11      Acceptor diffusion and segregation in (AlxGa1-x ) 0.5In0.5P heterostructures
   12      Source composition effects on dopant diffusion in gallium phosphide
 D  Ionic Motion in Materials with Disordered Structures
   1      Tracer diffusion and ionic conduction in single and mixed alkali borate glasses
   2      Mixed cation effects in alkali alkaline-earth silicate glasses
   3      Ionic Transport in Polymer Electrolytes of Variable Composition
 E  Strengthening and Nanostructure of Metals and Alloys
   1      Computer simulations of particle strengthening
   2      Strengthening of an L12-long range ordered intermetallic by disordered precipitates
   3      The effect of precipitate free zones on the yield strength of polycrystals of the commercial g'-strengthened nickel-base superalloy NIMONIC PE16
   4      Softening of the commercial g'-strengthened nickel-base superalloys NIMONIC PE16 and NIMONIC 105 at elevated temperatures
   5      Determination of the specific antiphase boundary energy of the L12-ordered g'-phases which strengthen the commercial superalloys NIMONIC PE16 and NIMONIC 105
   6      Measuring the dispersion of g'-precipitates in a g'-strengthened superalloy by atomic force microscopy
 F  Nanoanalysis of Interreactions
   1      Thermal stability of GMR sensor devices
   2      Structural transformation of oxide tunnel barriers under electrical overload
   3      Diffusion induced recrystallization of Au/Cu thin films
   4      Nucleation of product phase at reactive diffusion of Co/Al
   5      Interreaction of Ag/Al thin films
   6      Stabilization of non-equilibrium B2 phase during reaction of Ni/Al
   7      Growth morphology of Cu/SnPb solder reaction
   8      Growth of metallic nano-wires by focussed ion-deposition
 
 

Hans-Joachim Peter
EMail: vdv12@uni-muenster.de
HTML-Einrichtung: Izabela Klak
Informationskennung: FO11F
Datum: 2003-03-18 ---- 2003-07-03