P u b l i c a t i o n s

The results obtained in the framework of the research initiative The Nature of Laves Phases are published in peer-reviewed journals and presented at international conferences.

Articles Published in Peer-Reviewed Journals
 

O. Prymak and F. Stein:

“Solidification and High-Temperature Phase Equilibria in the Fe-Al-rich Part of the Fe-Al-Nb System”,

Intermetallics (2010) in press, http://dx.doi.org/10.1016/j.intermet.2009.12.022.

 

J. Aufrecht, A. Leineweber, A. Senyshyn, and E.J. Mittemeijer:

“The Absence of a Stable Hexagonal Laves Phase Modification (NbCr₂) in the Nb-Cr System”,

Scr. Mater. 62 (2010) 227-230.

 

D. Moroni-Klementowicz, M. Brando, C. Albrecht, W.J. Duncan, F.M. Grosche, D. Grüner, and G. Kreiner:
“Magnetism in Nb_1-y Fe_2+y: Composition and Magnetic Field Dependence”,

Phys. Rev. B 79 (2009) 224410.

A. Kerkau, D. Grüner, A. Ormeci, Yu. Prots, H. Borrmann, W. Schnelle, E. Bischoff, Yu. Grin, and G. Kreiner:

“Site Occupation Reversal in the C14 Laves Phase Nb(Cr_1-xCo_x)₂”,

Z. Anorg. Allg. Chem. 635 (2009) 637-648.

 

Yu. Grin, A. Simon, and A. Ormeci:

“Chemical Bonding in Laves Phases Revisited: Atom Volumina in Cs-K System”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 451-456.

 

F. Stein, M. Palm, G. Frommeyer, P. Jain, K.S. Kumar, L. Siggelkow, D. Grüner, G. Kreiner, and A. Leineweber:

“Microstructural Investigations of the Unusual Deformation Behaviour of Nb₂Co₇”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 457-462.

 

S. Voß, F. Stein, M. Palm, D. Grüner, G. Kreiner, G. Frommeyer, and D. Raabe:

“Composition Dependence of the Hardness of Laves Phases in the Fe-Nb and Co-Nb Systems”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 469-474.

 

J. Aufrecht, A. Leineweber, and E.J. Mittemeijer:

“Metastable Hexagonal Modifications of the NbCr₂ Laves Phase as a Function of Cooling Rate”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 481-486.

 

G. Kreiner, D. Grüner, Y. Grin, F. Stein, M. Palm, and A. Ormeci:

“Structure and Disorder of the Laves Phases in the Co-Nb System”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 487-492.

 

S. Kumar, P. Jain, S.W. Kim, F. Stein, and M. Palm:

“An In-situ Electron Microscopy Study of Microstructural Evolution in a Co-NbCo₂ Binary Alloy”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 493-498.

 

O. Prymak, F. Stein, A. Kerkau, A. Ormeci, G. Kreiner, G. Frommeyer, and D. Raabe:

“Phase Equilibria in the Ternary Nb-Cr-Al System and Site  Occupation in the Hexagonal C14 Laves Phase Nb(Al_xCr_1-x)₂”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 499-504.

 

C. He, F. Stein, M. Palm, and D. Raabe:

“Thermodynamic Re-Assessment of the Co-Nb Systems”,

Mater. Res. Soc. Symp. Proc. 1128 (2009) 239-244.

 

M. Palm:
“Phase Equilibria in the Fe Corner of the Fe–Al–Nb System between 800 and 1150 °C”,

J.Alloys Compd. 475 (2009) 173-177.

M. Brando, W.J. Duncan, D. Moroni-Klementowicz, C. Albrecht, D. Grüner, R. Ballou, and F.M. Grosche:
“Logarithmic Fermi-liquid Breakdown in NbFe₂”,

Phys. Rev. Lett. 101 (2008) 026401.

L. Siggelkow, U. Burkhardt, G. Kreiner, M. Palm, and F. Stein:

“Unusual Mechanical Behaviour of the Intermetallic Phase Nb₂Co₇”,

Mater. Sci. Eng. A 497 (2008) 174-180.

 

F. Stein, D. Jiang, M. Palm, G. Sauthoff, D. Grüner, and G. Kreiner:
“Experimental Reinvestigation of the Co–Nb Phase Diagram”,

Intermetallics 16 (2008) 785-792.

W. Baumann, A. Leineweber, and E.J. Mittemeijer:
“Calibration and Desmearing of a Differential Thermal Analysis Measurement Signal – upon Heating and Cooling – in the High-Temperature Region”,

Thermochim. Acta 472 (2008) 50-54.

M. Eumann, G. Sauthoff, and M. Palm:
“Phase Equilibria in the Fe–Al–Mo System – Part I: Stability of the Laves Phase Fe₂Mo and Isothermal Section at 800 °C”,

Intermetallics 16 (2008) 706-716.

D. Grüner, A. Ormeci, and G. Kreiner:
“Crystal Structure of Niobium Chromium Nickel,
Nb(Cr_1-xNi_x)₂ (x = 0.49(2))”,

Z. Kristallogr. - New Cryst.Struct. 221 (2006) 269-270.

D. Grüner, F. Stein, M. Palm, J. Konrad, A. Ormeci, W. Schnelle, Y. Grin, and G. Kreiner:
“Preparation, Phase Stability and Structure of the C36 Laves Phase Nb_1-xCo_2+x”,

Z.Kristallogr. 221 (2006) 319-333.

T. Yokosawa, K. Söderberg, M. Boström, D. Grüner, G. Kreiner, O. Terasaki:
“Microscopic Structures of Laves Phases and Structurally Related Compounds: A Transmission Electron Microscopy Study”,
Z.Kristallogr. 221 (2006) 357-374.

F. Stein, M. Palm, and G. Sauthoff:
“Structure and Stability of Laves Phases  Part II – Structure Type Variations in Binary and Ternary Systems”,
Intermetallics 13 (2005) 1056-1074.

F. Stein, M. Palm, and G. Sauthoff:
“Structure and Stability of Laves Phases  Part I – Critical Assessment of Factors Controlling Laves Phase Stability”,
Intermetallics 12 (2004) 713-720.

 

Other Publications

Presentations at International Conferences

 

S. Voß:

“Mechanische Eigenschaften von Laves Phasen am Beispiel von 1-phasigen Proben der Legierung NbFe₂”,

18. DGM Fachausschuss-Sitzung Intermetallische Phasen, GKSS-Forschungszentrum Geesthacht, Germany, January 13, 2010.

 

A. Leineweber, J. Aufrecht, W. Baumann, and E.J. Mittemeijer:

“Polytypic Phase Transformations in Laves Phases”,

EUROMAT 2009, Glasgow, UK, Sept. 7-10, 2009.

 

S. Voß, F. Stein, M. Palm, G. Frommeyer, D. Grüner, G. Kreiner, and D. Raabe:

“Hardness and Defect Softening of NbFe₂ and NbCo₂ Laves Phases in Dependence on Composition and Crystal Structure”,

4^th European School in Material Sciences, Ljubljana, Slovenia, May 25-30, 2009.

 

L. Siggelkow, A. Kerkau, U. Burkhardt, G. Kreiner, M. Palm, F. Stein, and W. Carrillo-Cabrera:

“Unusual Mechanical Behaviour of the Intermetallic Phase Nb₂Co₇”,

4^th European School in Material Sciences, Ljubljana, Slovenia, May 25-30, 2009.

 

Y. Grin, A. Simon, and A. Ormeci:

“Chemical Bonding in Laves Phases Revisited”,

invited lecture, MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

W. Baumann, A. Leineweber, F. Stein, S. Ishikawa, M. Takeyama, and E.J. Mittemeijer:

“Phase-Transformation Kinetics in the TiCr₂ Laves Phase”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

F. Stein, M. Palm, G. Frommeyer, P. Jain, K.S. Kumar, L. Siggelkow, D. Grüner, G. Kreiner, and A. Leineweber:

“Structure and Unusual Mechanical Behaviour of the Intermetallic Compound Nb₂Co₇”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

C. He, O. Dovbenko, F. Stein, M. Palm, and D. Raabe:

“Thermodynamic Assessment of the Co-Nb and Al-Co-Nb Systems”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

S. Voß, F. Stein, M. Palm, D. Grüner, G. Kreiner, G. Frommeyer, and D. Raabe:

“Composition Dependence of the Hardness of Laves Phases in the Fe-Nb and Co-Nb Systems”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

J. Aufrecht, A. Leineweber, E.J. Mittemeijer, V. Duppel, and A. Senyshyn:

“The (Meta)Stability of Hexagonal NbCr₂”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

G. Kreiner, A. Ormeci, Y. Grin, F. Stein, M. Palm, J. Konrad, G. Frommeyer, D. Raabe, A. Leineweber, E.J. Mittemeijer, D. Fischer, M. Jansen, D. Grüner, and O. Terasaki:

“Structure and Disorder of the Laves Phases in the Co-Nb System”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

S. Kumar, F. Stein, and M. Palm:

“An In-situ Electron Microscopy Study of Microstructural Evolution in a Co-Co₂Nb Binary Alloy”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

A. Kerkau, A. Ormeci, D. Grüner, E. Bischoff, Y. Prots, H. Borrmann, J. Grin, and G. Kreiner:

“Homogeneity Range and Substitutional Disorder in the Ternary C14 Laves Phase Nb(Cr_1-xCo_x)₂”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

O. Prymak, F. Stein, A. Kerkau, A. Ormeci, G. Kreiner, G. Frommeyer, and D. Raabe:

“Phase Equilibria in the Ternary Nb-Cr-Al System and Site  Occupation in theHexagonal C14 Laves Phase Nb(Cr,Al)₂”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

A. Ormeci, A. Kerkau, D. Grüner, and G. Kreiner:

“Preferential Site Occupation in Ternary C14 Laves Phases”,

MRS Fall Meeting 2008, Boston, MA, USA, Dec. 1-5, 2008.

 

A. Kerkau, E. Bischoff, A. Ormeci, Yu. Prots, H. Borrmann, D.Grüner, and G. Kreiner:

“Site Occupation Reversal in the C14 Laves Phase            Nb(Cr_1­‑xCo_x)₂”,

14. Vortragstagung der GDCh-Fachgruppe Festkörperchemie und Materialforschung, Bayreuth, Germany, Sept. 24-26, 2008.

 

A. Leineweber and M. Leoni:

“Simulation of Layer-Faulting in Nb₂Co₇ Intermetallic Compound using DIFFaX+”,

11^th European Powder Diffraction Conference, EPDIC-11, Warsaw, Poland, Sept. 19-22, 2008.

 

F. Stein and S. Voß:

“The Nature of Laves Phases: Observation of Defect Softening”,

invited lecture, Materials Science and Engineering MSE 2008, Nuremberg, Germany, Sept. 1-4, 2008.

 

D. Grüner, A. Kerkau, F. Stein, M. Palm, A. Ormeci, W. Schnelle, J. Grin, and G. Kreiner:

“Nb-based Laves Phases – Stability, Structure and Disorder”,

16^th Int. Conf. Solid Compounds of Transition Elements SCTE 2008, Dresden, Germany, July 26-31, 2008.

 

A. Kerkau, G. Kreiner, and A. Ormeci:

“Theoretical Study of Site Preference in Ternary C14 Laves Phases A(B'_1-xB''_x)₂”,

16^th Int. Conf. Solid Compounds of Transition Elements SCTE 2008, Dresden, Germany, July 26-31, 2008.

 

F. Stein, O. Prymak, O. Dovbenko, and M. Palm:

“Phase Equilibria of Laves Phases in Ternary Nb-X-Al Systems with X = Cr, Fe, Co”,

Discussion Meeting on Thermodynamics of Alloys - TOFA 2008, Krakow, Poland, June 22-27, 2008.

 

O. Prymak and F. Stein:

“Composition Dependence of Site Occupancy and c/a Ratio in the Hexagonal C14 Laves Phase of the Nb-Cr-Al System”,

Discussion Meeting on Thermodynamics of Alloys - TOFA 2008, Krakow, Poland, June 22-27, 2008.

 

S. Zaefferer, S. Ishikawa, and F. Stein:

“Distinction of Different Laves Phase Types by EBSD in a TiCr Diffusion Couple: Robust Detection of Subtle Differences in EBSD Patterns”,

Electron Backscatter Diffraction Meeting, RMS Conference, Sheffield, UK, March 31-April 1, 2008.

 

S. Ishikawa, M. Takeyama, S. Zaefferer, M. Palm, and F. Stein:

“Phase Equilibria and Phase Transformations of Laves Phases in the Cr-Ti Binary System – The Nature of Laves Phases”,

JIM Annual Spring Meeting 2008, Tokyo, Japan, March 26-28, 2008.

 

G. Kreiner:
“Nb Based Laves Phases - Stability, Structure and Disorder”,
invited lecture, Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic, Feb. 28, 2008.

 

G. Kreiner:
“Complex Metallic Alloy Phases - From Simple to Complex Phases”,
invited lecture, Anorganisch-Chemisches Kolloquium, Institut für Anorganische und Analytische Chemie, Universität Freiburg, Germany, Dec. 12, 2007.

 

A. Leineweber, J. Aufrecht, W. Baumann, E.J. Mittemeijer, G. Kreiner, D. Grüner, A. Ormeci, Y. Grin, F. Stein, M. Palm, O. Prymak, G. Sauthoff, G. Frommeyer, D. Raabe, D. Fischer, and M. Jansen:
“Point and Layer Defects in Transition-Metal based Laves Phases”,
EUROMAT 2007, Nuremberg, Germany, Sept. 10-13, 2007.

O. Prymak, F. Stein, G. Frommeyer, and D. Raabe:
“Laves Phases in the Ternary Nb-Cr-Al System: Phase Equilibria at 1150, 1300, and 1450 °C”,
EUROMAT 2007, Nuremberg, Germany, Sept. 10-13, 2007.

G. Kreiner:
“The Nature of Laves Phases – Eine institutsübergreifende Forschungsinitiative der Max-Planck-Gesellschaft”,
15. DGM Fachausschuss-Sitzung Intermetallische Phasen, Düsseldorf, Germany, Jan. 10, 2007.

F. Stein, M. Palm, O. Prymak, D. Grüner, A. Ormeci, G. Kreiner, A. Leineweber, D. Fischer, G. Sauthoff, G. Frommeyer, D. Raabe, E.J. Mittemeijer, M. Jansen, and Y. Grin:
“The Nature of Laves Phases – Case Studies on Selected Binary and Ternary Transition Metal Systems”,
MRS Fall Meeting 2006, Boston, MA, USA, Nov.27-Dec. 1, 2006.

A. Ormeci, D. Grüner, Y. Grin, and G. Kreiner:
“First-principles Study of C14 Laves Phases NbTM₂ (TM = Mn, Fe, Co)”,
13. Vortragstagung der GDCh-Fachgruppe Festkörperchemie und Materialforschung, Aachen, Germany, Sept. 20-22, 2006.

F. Stein, D. Grüner, D. Jiang, J. Konrad, G. Kreiner, A. Ormeci, and M. Palm:
“Structures and Homogeneity Ranges of Off-Stoichiometric Laves Phases in the Co-Nb System”,
High Temperature Materials Chemistry HTMC-XII, Vienna, Austria, Sept. 17-22, 2006.

F. Stein, M. Palm, D. Jiang, J. Konrad, D. Grüner, G. Kreiner, Y. Grin, G. Sauthoff, G. Frommeyer, and D. Raabe:
“Off-Stoichiometry of Laves Phases”,
INPT SAIC INPACT "Dew School" on Structural Defects in Ordered Alloys and Intermetallics, Bonascre, France, March 19-25, 2006.

F. Stein, O. Dovbenko, and M. Palm:
“Experimental Investigations of Structure Type Variations of Laves Phases”, Int. Conf. "Modern Materials Science: Achievements and Problems", Kiev, Ukraine, Sept. 26-30, 2005.

F. Stein, O. Dovbenko, and M. Palm:
“Phase Relations between Laves Phases in Transition Metal Systems – Case Studies: Co-Nb, Al-Co-Nb, Cr-Ti, Fe-Zr, Al-Fe-Zr”, EUROMAT 2005, Prague, Czech Republic, Sept. 5-8, 2005.

D. Grüner, A. Ormeci, G. Kreiner, F. Stein, M. Palm, D. Raabe, G. Frommeyer, G. Sauthoff, and Y. Grin:
“The Nb-Co System: A Case Study on the Nature of Laves Phases”,
10^th Europ. Conf. Solid State Chem. (ECSSC 10), Sheffield, UK, Aug. 29-Sept. 1, 2005.

O. Dovbenko, M. Palm, and F. Stein:
“Phase Equilibria in the Al-Co-Nb Ternary System in the Vicinity of the Laves Phases”, CALPHAD XXXIV, Maastricht, The Netherlands, May 22-27, 2005.

D. Grüner, Y. Grin, and G. Kreiner:
“Strukturuntersuchungen an Nb-basierten Laves-Phasen
vom MgZn₂-Typ”,
Gemeinsame Jahrestagung der Deutschen Gesellschaft für Kristallographie, der Deutschen Gesellschaft für Kristallwachstum und Kristallzüchtung und des Nationalkomitees für Kristallographie der Österreichischen Akademie der Wissenschaften, Cologne, Germany, Febr. 28 – March 4, 2005.

F. Stein, J. Konrad, and M. Palm:
“Identification of Sequences of Phases by EBSD in Nb-Co Diffusion Couples”, COST 535 Diffusion Couple Workshop, MPI für Eisenforschung, Düsseldorf, Germany, Dec. 6-7, 2004.

O. Dovbenko, M. Palm, and F. Stein:
“Investigation of the Phase Equilibria in the Al-Co-Nb System using Liquid-Solid Diffusion Couples. Preliminary Results”, COST 535 Diffusion Couple Workshop, MPI für Eisenforschung, Düsseldorf, Germany, Dec. 6-7, 2004. 

 

D. Grüner, A. Ormeci, G. Kreiner, and Y. Grin:
“Laves-Phasen im System Cobalt-Niob”,
12. Vortragstagung der GDCh-Fachgruppe Festkörperchemie und Materialforschung: „Struktur-Eigenschafts-Beziehungen“ , Marburg, Germany, Sept. 13-15, 2004.

F. Stein, D. Jiang, G. Sauthoff, and M. Palm:
“Laves Phase Polytypism in the Co-Nb System”, Discussion Meeting on Thermodynamics of Alloys - TOFA 2004, Vienna, Austria, Sept. 12-17, 2004.

F. Stein:
“Structure and Stability of Laves Phases in Binary and Ternary Systems”, invited lecture, CEA Saclay, Gif-sur-Yvette, France, March 26, 2004.

D. Grüner, G. Kreiner, and Y. Grin:
“Zur Defektstruktur von Nb_1−xCo_2+x (x ≈ 0,25)”,
Gemeinsame Jahrestagung der Deutschen Gesellschaft für Kristallographie und der Deutschen Gesellschaft für Kristallwachstum und Kristallzüchtung, Jena, Germany, March 15-19, 2004.