<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">P.K. Galenko</style></author><author><style face="normal" font="default" size="100%">G. Phanikumar</style></author><author><style face="normal" font="default" size="100%">O. Funke</style></author><author><style face="normal" font="default" size="100%">L. Chernova</style></author><author><style face="normal" font="default" size="100%">S. Reutzel</style></author><author><style face="normal" font="default" size="100%">M. Kolbe</style></author><author><style face="normal" font="default" size="100%">D M. Herlach</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Dendritic solidification and fragmentation in undercooled Ni-Zr alloys</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science and Engineering A</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><volume><style face="normal" font="default" size="100%">448-451</style></volume><pages><style face="normal" font="default" size="100%">649-653</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">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 system, the dendrite growth velocity has been measured as a function of initial undercooling in solidifying droplets processed by the electromagnetic levitation technique. Analyses of solidified droplets give evidence to a transition from coarse grained dendrites to grain refined dendrites (CG-GR) at small undercooling, a transition from grain refined dendrites to coarse grained dendrites (GR-CG) at moderate undercooling, and to a second transition from coarse grained dendrites to grain refined dendrites (CG-GR) at a higher undercooling. Predictions of a sharp-interface model are compared with the results of experiments on Ni-Zr samples. © 2006 Elsevier B.V. All rights reserved.</style></abstract><notes><style face="normal" font="default" size="100%">cited By (since 1996) 4</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lierfeld, T.</style></author><author><style face="normal" font="default" size="100%">Gandham, P.</style></author><author><style face="normal" font="default" size="100%">M. Kolbe</style></author><author><style face="normal" font="default" size="100%">Schenk, T.</style></author><author><style face="normal" font="default" size="100%">Singer, H.M.</style></author><author><style face="normal" font="default" size="100%">Eggeler, G.</style></author><author><style face="normal" font="default" size="100%">D M. Herlach</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Particle incorporation in metallic melts during dendritic solidification-undercooling experiments under reduced gravity</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science and Engineering A</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><volume><style face="normal" font="default" size="100%">448-451</style></volume><pages><style face="normal" font="default" size="100%">689-692</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The interaction of ceramic particles with a dendritic solid/liquid-interface has been investigated by undercooling experiments with different levels of convection: (i) in a terrestrial electromagnetic levitation facility and (ii) in TEMPUS, a facility for containerless processing, under low gravity conditions during parabolic flights. Entrapment of particles in ground experiments and engulfment of a significant fraction of submicron particles under low gravity conditions are attributed to the lower level of convection in the latter experiments and to morphological features of dendritic solidification. X-ray radiography has been used for in situ observations of directional solidification in Al90Cu10 with alumina particles. © 2006 Elsevier B.V. All rights reserved.</style></abstract><notes><style face="normal" font="default" size="100%">cited By (since 1996) 1</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">O. Funke</style></author><author><style face="normal" font="default" size="100%">G. Phanikumar</style></author><author><style face="normal" font="default" size="100%">P.K. Galenko</style></author><author><style face="normal" font="default" size="100%">L. Chernova</style></author><author><style face="normal" font="default" size="100%">S. Reutzel</style></author><author><style face="normal" font="default" size="100%">M. Kolbe</style></author><author><style face="normal" font="default" size="100%">D M. Herlach</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Dendrite growth velocity in levitated undercooled nickel melts</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Crystal Growth</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><number><style face="normal" font="default" size="100%">1</style></number><volume><style face="normal" font="default" size="100%">297</style></volume><pages><style face="normal" font="default" size="100%">211-222</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">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 (CPS) [K. Eckler, D.M. Herlach, Mater. Sci. Eng. A 178 (1994) 159]. In addition to that, previous data sets obtained by different techniques are not in good agreement with each other. For instance, growth velocity data for nickel melts obtained with a high-speed camera system [D.M. Matson, in: Solidification 1998, TMS, Warrendale PA, 1998, p. 233] show higher values at low undercoolings than data obtained with the CPS. Within this work new measurements of dendritic growth velocity in levitated undercooled nickel samples were performed as a function of undercooling ΔT to investigate this discrepancy. Solidification of the undercooled melt was detected at undercooling levels within the range of 30 K&lt;ΔT&lt;300 K. The new data reveal high accuracy and low scattering. These data are compared with two independent growth velocity data sets and discrepancies are discussed. For verification of the new CPS data dendrite growth velocity was also measured by using a high-speed camera where the morphology of the intersection of the solidification front with the sample surface was investigated. The new experimental data are analyzed within the model of dendrite growth obtained on the basis of Brener's theory [E. Brener, J. Crystal Growth 99 (1990) 165] and the model of dendrite growth with melt convection in a solidifying levitated drop, presently being developed. Special attention is paid to the effects of convection and small amounts of impurities on the growth dynamics at small undercoolings. © 2006 Elsevier B.V. All rights reserved.</style></abstract><notes><style face="normal" font="default" size="100%">cited By (since 1996) 10</style></notes></record></records></xml>