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In-situ synchrotron XRD measurements during solidification of a melt in the CaO-SiO2 system using an aerodynamic levitation system

Schraut, Katharina and Kargl, Florian and Adam, Christian and Ivashko, Oleh (2021) In-situ synchrotron XRD measurements during solidification of a melt in the CaO-SiO2 system using an aerodynamic levitation system. Journal of Physics - Condensed Matter. Institute of Physics (IOP) Publishing. doi: 10.1088/1361-648X/abf7e1. ISSN 0953-8984. (In Press)

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Official URL: https://iopscience.iop.org/article/10.1088/1361-648X/abf7e1#

Abstract

Phase formation and evolution was investigated in the CaO-SiO2 system in the range of 70-80 mol% CaO. The samples were container-less processed in an aerodynamic levitation system and crystallization was followed in-situ by synchrotron X-ray diffraction at the beamline P21.1 at the German electron synchrotron (DESY). Modification changes of di- and tricalcium silicate were observed and occurred at lower temperatures than under equilibrium conditions. Despite deep sample undercooling, no metastable phase formation was observed within the measurement timescale of 1 s. For the given cooling rates ranging from 300 K/s to about 1 K/s, no decomposition of tricalcium silicate was observed. No differences in phase evolution were observed between reducing and oxidizing conditions imposed by the levitation gas (Ar and Ar+O2). We demonstrate that this setup has great potential to follow crystallization in refractory oxide liquids in-situ. For sub-second primary phase formation faster detection and for polymorph detection adjustments in resolution have to be implemented.

Item URL in elib:https://elib.dlr.de/141838/
Document Type:Article
Additional Information:CO2 Reduktion für Stahl- und Zementindustrie
Title:In-situ synchrotron XRD measurements during solidification of a melt in the CaO-SiO2 system using an aerodynamic levitation system
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schraut, KatharinaBAMhttps://orcid.org/0000-0002-2740-1539
Kargl, FlorianFlorian.Kargl (at) dlr.deUNSPECIFIED
Adam, ChristianBAMUNSPECIFIED
Ivashko, OlehDESYUNSPECIFIED
Date:14 April 2021
Journal or Publication Title:Journal of Physics - Condensed Matter
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1088/1361-648X/abf7e1
Publisher:Institute of Physics (IOP) Publishing
ISSN:0953-8984
Status:In Press
Keywords:aerodynamic levitation, synchrotron XRD, phase selection, phase formation, liquid CaO-SiO2
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 - Material Design and New Materials, R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Kargl, Dr Florian
Deposited On:19 Apr 2021 10:55
Last Modified:19 Apr 2021 10:55

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