Journal Article

PUBDB-2021-02476

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In situ synchrotron XRD measurements during solidification of a melt in the CaO–SiO$_2$ system using an aerodynamic levitation system

Schraut, K. (Corresponding author) ; Kargl, F. ; Adam, C. ; Ivashko, O.DESY*

2021
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/1361-648X/abf7e1  doi:10.3204/PUBDB-2021-02476

Abstract: Phase formation and evolution was investigated in the CaO–SiO$_2$ 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$^{−1}$ to about 1 K s$^{−1}$, 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 + O$_2$). We demonstrate that this setup has great potential to followcrystallization 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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
3. FS-Proposal: I-20191124 (I-20191124) (I-20191124)

Experiment(s):

1. PETRA Beamline P21.1 (PETRA III)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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