elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Solidification of tetragonal Ni2B from the undercooled melt

Binder, Sven and Kolbe, Matthias and Klein, Stefan and Herlach, Dieter (2012) Solidification of tetragonal Ni2B from the undercooled melt. Europhysics Letters, 97, p. 36003. DOI: 10.1209/0295-5075/97/36003.

Full text not available from this repository.

Abstract

The dendrite growth velocity during non-equilibrium solidification of tetragonal Ni2B crystals is measured as a function of undercooling on electrostatically levitated droplets. Highspeed video imaging is applied to measure in situ the propagation of the solid-liquid interface apparent on the sample surface. To analyze the raw data, a three-dimensional model is developed to determine the growth velocity within the volume of the melt. Microstructure analysis is performed to resolve the pattern formation mechanism of tetragonal Ni2B crystals which differs significantly from the cubic case. The dendrite tips are found to grow perpendicular to the crystallographic {111} planes. As a consequence, the propagation of the solidification front on a macroscopic scale is determined by the lattice parameters of the tetragonal crystal structure. The dendrite growth velocities along the {111} normal directions are analyzed on a mesoscopic scale within a sharpinterface model.

Document Type:Article
Title:Solidification of tetragonal Ni2B from the undercooled melt
Authors:
AuthorsInstitution or Email of Authors
Binder, Svensven.binder@dlr.de
Kolbe, Matthiasmatthias.kolbe@dlr.de
Klein, Stefanstefan.klein@dlr.de
Herlach, Dieterdieter.herlach@dlr.de
Date:3 February 2012
Journal or Publication Title:Europhysics Letters
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:97
DOI:10.1209/0295-5075/97/36003
Page Range:p. 36003
Status:Published
Keywords:Unterkühlung von Materialien
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Dieter Herlach
Deposited On:26 Mar 2012 15:02
Last Modified:04 Apr 2013 16:36

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.