Anisotropic lattice expansion determined during flash sintering of BiFeO3 by in-situ energy-dispersive X-ray diffraction

Mary Anne B. Wassel, Luis A. Pérez-Maqueda, Eva Gil-Gonzalez, Harry Charalambous, Antonio Perejon, Shikhar K. Jha, John Okasinski, Thomas Tsakalakos

Research output: Contribution to journalArticle

1 Citations (Scopus)

Abstract

BiFeO3 has a Curie temperature (TC) of 825 °C, making it difficult to sinter using conventional methods while maintaining the purity of the material, as unavoidably secondary phases appear at temperatures above Tc. Flash sintering is a relatively new technique that saves time and energy compared to other sintering methods. BiFeO3 was flash sintered at 500 °C to achieve 90% densification. In-situ energy dispersive X-ray diffraction (EDXRD) revealed that the material did not undergo any phase transformation, having been sintered well below the TC. Interestingly, anisotropic lattice expansion in the material was observed when the sample was exposed to the electric field.

Original languageEnglish (US)
Pages (from-to)286-291
Number of pages6
JournalScripta Materialia
Volume162
DOIs
StatePublished - Mar 15 2019
Externally publishedYes

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flash
sintering
Sintering
X ray diffraction
expansion
densification
diffraction
phase transformations
Curie temperature
purity
x rays
Densification
electric fields
energy
Phase transitions
Electric fields
temperature
Temperature

Cite this

Wassel, Mary Anne B. ; Pérez-Maqueda, Luis A. ; Gil-Gonzalez, Eva ; Charalambous, Harry ; Perejon, Antonio ; Jha, Shikhar K. ; Okasinski, John ; Tsakalakos, Thomas. / Anisotropic lattice expansion determined during flash sintering of BiFeO3 by in-situ energy-dispersive X-ray diffraction. In: Scripta Materialia. 2019 ; Vol. 162. pp. 286-291.
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Wassel, MAB, Pérez-Maqueda, LA, Gil-Gonzalez, E, Charalambous, H, Perejon, A, Jha, SK, Okasinski, J & Tsakalakos, T 2019, 'Anisotropic lattice expansion determined during flash sintering of BiFeO3 by in-situ energy-dispersive X-ray diffraction' Scripta Materialia, vol. 162, pp. 286-291. https://doi.org/10.1016/j.scriptamat.2018.11.028

Anisotropic lattice expansion determined during flash sintering of BiFeO3 by in-situ energy-dispersive X-ray diffraction. / Wassel, Mary Anne B.; Pérez-Maqueda, Luis A.; Gil-Gonzalez, Eva; Charalambous, Harry; Perejon, Antonio; Jha, Shikhar K.; Okasinski, John; Tsakalakos, Thomas.

In: Scripta Materialia, Vol. 162, 15.03.2019, p. 286-291.

Research output: Contribution to journalArticle

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AU - Wassel, Mary Anne B.

AU - Pérez-Maqueda, Luis A.

AU - Gil-Gonzalez, Eva

AU - Charalambous, Harry

AU - Perejon, Antonio

AU - Jha, Shikhar K.

AU - Okasinski, John

AU - Tsakalakos, Thomas

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