D. M. Herlach

Publication List Details

Period

1983 - 2009

Number

772

Co-Authors

Non-equilibrium solidification of intermetallic compounds in the Ni-Al alloy system (2007)

Hartmann, H., Reutzel, S., Galenko, P. K., Assadi, H., Herlach, D. M.

Ni-Al alloy system exhibits particular solidication behavior due to chemical long-range order of the intermetallic compounds Ni3Al (L12) and NiAl (B2). Using rapid solidication technique their slow...

Phase Formation in Undercooled Sm–Co Alloy Melts (2007)

Reutzel, S., Strohmenger, J., Volkmann, T., Gao, J., Herlach, D. M.

SmxCo100−x alloy melts (x = 10.5, 12.5 and 17 at.%) are processed containerlessly by electromagnetic levitation and drop-tube technique in order to get access to the metastable state of the...

Dendritic solidification and fragmentation in undercooled Ni-Zr alloys (2007)

Galenko, P.K., Phanikumar, G., Funke, O., Chernova, L., Reutzel, S., Kolbe, M., ...

Kinetics of dendritic solidification and fragmentation of dendritic crystals in undercooled Ni–Zr samples are studied. Using the capacitance proximity sensor technique and a high-speed-camera...

Crystallization of Nd2Fe17Bx from its stoichiometric melt composition (2007)

Gao, J. R., Volkmann, T., Yang, S., Reutzel, S., Herlach, D. M., Song, X. P.

Containerless solidification of gas-atomized Nd10Fe85B5 melt droplets was carried out using the drop tube technique. The phase constituents and microstructure of the solidified samples were...

Change of the Kinetics of Solidification and Microstructure Formation induced by Convection in the Ni-Al System (2007)

Reutzel, S., Hartmann, H., Galenko, P. K., Schneider, S., Herlach, D. M.

The purpose of the present work was to measure the velocity of dendrite growth in undercooled Ni–Al alloy melts as a function of undercooling. The experiments were performed both by containerless...

Solidification from Undercooled Melts: Nucleation and Crystal Growth (2006)

Herlach, D.M., Galenko, P., Volkmann, T.

Electromagnetic levitation technique is applied to containerlessly undercool bulk samples in diameter of 6-8 mm. The technique is combined with the diagnostic means at the Institut Laue Langevin and...

Phase formation in undercooled Sm-Co alloy melts (2006)

Reutzel, S., Strohmenger, J., Volkmann, T., Gao, J., Herlach, D. M.

SmxCo100-x alloy melts (x = 10.5, 12.5 and 17) are processed containerlessly by electromagnetic levitation and drop tube technique in order to get access to the metastable state of the undercooled...

Kinetics of solidification of B2 intermetallic phase in the Ni-Al system (2006)

Assadi, H., Reutzel, S., Herlach, D. M.

Solidification from the undercooled melt is dominated by nucleation and subsequent crystal growth. The kinetics of rapid solidification of chemically ordered intermetallics can be remarkably...

Dendritic solidification of undercooled Ni-based melts (2006)

Reutzel, S., Galenko, P. K., Herlach, D. M.

Morphology and size of dendritic microstructures sensitively depend on the solidification conditions, in particular on the crystallisation dynamics of the melt. Depending on the velocity with which a...

Modeling of dendritic crystal growth in undercooled Ni-Zr melts (2006)

Galenko, P. K., Reutzel, S., Herlach, D. M., Danilov, D., Nestler, B.

Growth of dendritic crystals in undercooled Ni-Zr samples is studied by experimental, analytical and numerical methods. Experimental results provided by electo-magnetic levitation technique are...

Undercooling and Solidification of Peritectic Cu-Ge Alloys in Strong Magnetic Field (2006)

Gao, J., Zhang, Y. K., Reutzel, S., Herlach, D. M., He, J. C.

Undercooling and solidification of peritectic Cu-14.8 wt.% Ge alloys were carried out using the glass fluxing technique with and without a static magnetic field of 10 T. The microstructure of the...

Solidification of Undercooled Intermetallic Forming Systems (2006)

Assadi, H., Reutzel, S., Herlach, D. M.

Intermetallics exhibit unique solidification behaviour due to their chemical long-range order. This includes, for instance, generally slow solidification kinetics, and in some cases, an anomalous...

Metastable Solids from Undercooled Melts (2006)

Herlach, D.M.

Undercooled melts of metals and alloys possess an excess free energy. This opens up a variety of solidification pathways from the liquid to the solid with the benefit that a great number of...

Fluid Flow Effects on Growth Kinetics of undercooled Ni-Al Alloy Melts (2006)

Reutzel, S., Hartmann, H., Galenko, P. K., Herlach, D. M.

Fluid flow in Ni-Al alloy melts plays an important role for the formation of phases and microstructures during solidification due to its influence on heat and mass transport ahead of the solid-liquid...

Heat treatment of Metastable Nd2Fe17Bx Phase Formed from Undercooled Melt of Nd-Fe-B Alloys (2006)

Ozawa, S., Kuribayashi, K., Hirosawa, S., Reutzel, S., Herlach, D. M.

Alloys of Nd10Fe85B5, Nd12Fe82B6, and Nd14Fe79B7 were melted and then solidified under the containerless state using a drop tube. In the as-dropped sample, a large amount of the Nd2Fe17Bx was...

Dendrite Growth Velocity in Levitated Undercooled Nickel Melts (2006)

Funke, O., Phanikumar, G., Galenko, P. K., Chernova, L., Reutzel, S., Kolbe, M., ...

Model predictions for the dendrite growth velocity at low undercoolings are deviating significantly from experimental data obtained in electromagnetic levitation with a Capacitance Proximity Sensor...

Characterization of the Microstructure of Gas-atomized Nd-Fe-B Alloy Particles of Non-peritectic Chemical Compounds (2005)

Gao, J., Volkmann, T., Reutzel, S., Herlach, D.M.

Gas-atomized Nd-Fe-B droplets of non-peritectic chemical compositions Nd16Fe76B8, Nd17Fe74.5B8.5, and Nd18Fe73B9 were undercooled and solidified in an 8-m drop tube filled with helium. The...

Magnetic Properties of Undercooled Co-based Alloys (2004)

Reutzel, S., Herlach, D.M.

Co-based melts in a glass flux can be undercooled nearly as strong as samples processed containerless by electromagnetic levitation. The undercooling technique is combined with the use of a...

Measuring Magnetic Susceptibility of undercooled Co-based alloys with a Faraday Balance (2001)

Reutzel, S., Herlach, D. M.

Co-based melts embedded by glass flux in a crucible can be undercooled nearly as strong as samples processed containerlessly by electromagnetic levitation. This allows to measure magnetic...

Direct determination of metastable phase diagram by synchrotron radiation experiments on undercooled metallic melts (2001)

Notthoff, C., Feuerbacher, B., Franz, H., Herlach, D.M., Holland-Moritz, D.

The phase selection process during the crystallization of undercooled metallic melt is studied in situ by combining the electromagnetic levitation technique with energy dispersive x-ray diffraction...

Electromagnetic levitation apparatus for investigations of the phase selection in undercooled melts by energy-dispersive X-ray diffraction (2000)

Notthoff, C., Franz, H., Hanfland, M., Herlach, D.M., Holland-Moritz, D., Petry, W.

The metastable state of an undercooled melt can provide access to the formation of metastable phases whose crystallographic structures differ from their stable counterparts. The electromagnetic...

Eutectic Solidification Microstructures of Undercooled Co-Sb Alloys. (1998)

Wei, B., Herlach, D. M., Feuerbacher, B., Sommer, F.

Co-20wt%Sb hypoeutectic, Co-41.4wt%Sb eutectic, and Co-45wt%Sb hypereutectic alloys were undercooled by up to 224 K, 225 K, and 177 K respectively; the eutectic growth velocities during rapid...

Containerless Undercooling and Solidification of Pure Metals. (1990)

Herlach, D.M.

Drop tubes and electromagnetic levitation are described as techniques for containerless processing. The constraints of maximum undercoolability of metals are discussed with respect to thermodynamic...

Undercooling and Solidification. (1990)

Herlach, D.M., Willnecker, R.

Undercooling investigations on liquids are of fundamental interest in studying solidification phenomena and their consequences on microstructure development. Experimental techniques to achieve a deep...