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Twinned dendrites in CrB-structured intermetallic NiGd

Niersbach, Till and Kolbe, Matthias and Becker, Maike and Kargl, Florian (2022) Twinned dendrites in CrB-structured intermetallic NiGd. IOP Conference Series : Materials Science and Engineering. Institute of Physics (IOP) Publishing. ISSN 1757-8981.

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Abstract

The formation of twinned dendrites was investigated in orthorhombic CrB-structured NiGd. A NiGd droplet embedded in borosilicate glass-flux was processed by differential scanning calorimetry. A small undercooling of ≈ 20 °C was reached and a cross-section of the solidified sample was analyzed with EBSD. A twinned dendrite is found, that exhibits a twin boundary in its center, both parts sharing a direction and a misorientation angle of 40° between its two parts. The present findings are in agreement with model predictions for CrB-structured alloy solidification based on the investigation of deeply undercooled and homogeneously nucleating NiZr. The present investigation on NiGd serves as a first important step to validate the model's predictions. Due to the observation of twinned dendrites at small undercoolings, the present study may further serve as a first-step to extend the model to heterogeneous growth regimes.

Item URL in elib:https://elib.dlr.de/188932/
Document Type:Article
Title:Twinned dendrites in CrB-structured intermetallic NiGd
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Niersbach, Tilltill.niersbach (at) dlr.dehttps://orcid.org/0000-0001-6652-6249
Kolbe, Matthiasmatthias.kolbe (at) dlr.deUNSPECIFIED
Becker, MaikeMaike.Becker (at) dlr.dehttps://orcid.org/0000-0002-6732-5411
Kargl, FlorianFlorian.Kargl (at) dlr.deUNSPECIFIED
Date:2022
Journal or Publication Title:IOP Conference Series : Materials Science and Engineering
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:No
In ISI Web of Science:No
Publisher:Institute of Physics (IOP) Publishing
ISSN:1757-8981
Status:Accepted
Keywords:Nucleation ; Twinning ; Dendrite ; Quasicrystal ; NiZr ; NiGd ; grain boundary ; crystal growth ; CrB ; orthorhombic ; undercooling
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 - Research under Space Conditions
DLR - Research theme (Project):R - User Centre Research under Space Conditions
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Niersbach, Till
Deposited On:17 Oct 2022 10:25
Last Modified:17 Oct 2022 10:25

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