Interactions of CaO with pure Mg and Mg-Ca alloys—an in situ synchrotron radiation diffraction study

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Interactions of CaO with pure Mg and Mg-Ca alloys—an in situ synchrotron radiation diffraction study. / Wiese, Björn; Mendis, Chamini L.; Tolnai, Domonkos et al.
In: JPhys Materials, Vol. 7, No. 3, 035008, 04.07.2024.

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Wiese B, Mendis CL, Tolnai D, Hort N. Interactions of CaO with pure Mg and Mg-Ca alloys—an in situ synchrotron radiation diffraction study. JPhys Materials. 2024 Jul 4;7(3):035008. doi: 10.1088/2515-7639/ad3fe9

Bibtex

@article{0983b602e52941e3a977517843ab13ba,
title = "Interactions of CaO with pure Mg and Mg-Ca alloys—an in situ synchrotron radiation diffraction study",
abstract = "CaO additions are used as an inexpensive replacement for Ca in Mg alloys. CaO dissociation in Mg has been reported in literature without a clear mechanism as to why this occurs. In situ synchrotron radiation diffraction investigation of the melting and solidification of Mg with CaO shows, that the stability of CaO was overestimated in Mg melts compared with MgO. The experiments that were performed on the Mg-20CaO and Mg-xCa-6CaO (x = 6 and 16 wt.%) alloys, show the dissociation and formation of various phases during melting and solidification. The results indicate that Mg can reduce CaO even in the solid state, which is the opposite of that proposed by the Ellingham diagrams for stoichiometric reaction. Phase formations during the in situ experiment are compared with published thermodynamic calculations for the interaction between Mg-Ca alloys and oxides.",
keywords = "Eco-Mg, in situ, Mg-based alloys, Mg-Ca-O system, synchrotron diffraction, Engineering",
author = "Bj{\"o}rn Wiese and Mendis, {Chamini L.} and Domonkos Tolnai and Norbert Hort",
note = "Publisher Copyright: {\textcopyright} 2024 The Author(s). Published by IOP Publishing Ltd",
year = "2024",
month = jul,
day = "4",
doi = "10.1088/2515-7639/ad3fe9",
language = "English",
volume = "7",
journal = "JPhys Materials",
issn = "2515-7639",
publisher = "IOP Publishing Ltd",
number = "3",

}

RIS

TY - JOUR

T1 - Interactions of CaO with pure Mg and Mg-Ca alloys—an in situ synchrotron radiation diffraction study

AU - Wiese, Björn

AU - Mendis, Chamini L.

AU - Tolnai, Domonkos

AU - Hort, Norbert

N1 - Publisher Copyright: © 2024 The Author(s). Published by IOP Publishing Ltd

PY - 2024/7/4

Y1 - 2024/7/4

N2 - CaO additions are used as an inexpensive replacement for Ca in Mg alloys. CaO dissociation in Mg has been reported in literature without a clear mechanism as to why this occurs. In situ synchrotron radiation diffraction investigation of the melting and solidification of Mg with CaO shows, that the stability of CaO was overestimated in Mg melts compared with MgO. The experiments that were performed on the Mg-20CaO and Mg-xCa-6CaO (x = 6 and 16 wt.%) alloys, show the dissociation and formation of various phases during melting and solidification. The results indicate that Mg can reduce CaO even in the solid state, which is the opposite of that proposed by the Ellingham diagrams for stoichiometric reaction. Phase formations during the in situ experiment are compared with published thermodynamic calculations for the interaction between Mg-Ca alloys and oxides.

AB - CaO additions are used as an inexpensive replacement for Ca in Mg alloys. CaO dissociation in Mg has been reported in literature without a clear mechanism as to why this occurs. In situ synchrotron radiation diffraction investigation of the melting and solidification of Mg with CaO shows, that the stability of CaO was overestimated in Mg melts compared with MgO. The experiments that were performed on the Mg-20CaO and Mg-xCa-6CaO (x = 6 and 16 wt.%) alloys, show the dissociation and formation of various phases during melting and solidification. The results indicate that Mg can reduce CaO even in the solid state, which is the opposite of that proposed by the Ellingham diagrams for stoichiometric reaction. Phase formations during the in situ experiment are compared with published thermodynamic calculations for the interaction between Mg-Ca alloys and oxides.

KW - Eco-Mg

KW - in situ

KW - Mg-based alloys

KW - Mg-Ca-O system

KW - synchrotron diffraction

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85198220931&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/ee3bb2d2-bed9-3d13-912b-e275e26becb1/

U2 - 10.1088/2515-7639/ad3fe9

DO - 10.1088/2515-7639/ad3fe9

M3 - Journal articles

AN - SCOPUS:85198220931

VL - 7

JO - JPhys Materials

JF - JPhys Materials

SN - 2515-7639

IS - 3

M1 - 035008

ER -

DOI

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