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On the synchronicity of flash sintering and phase transformation
Author(s) -
Yoon Bola,
Yadav Devinder,
Ghose Sanjit,
Sarin Pankaj,
Raj Rishi
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16335
Subject(s) - sintering , spinel , flash (photography) , materials science , transformation (genetics) , phase (matter) , magnesium , metallurgy , mineralogy , chemical engineering , chemistry , optics , biochemistry , physics , organic chemistry , gene , engineering
There is growing evidence that oxides of complex chemistries can be formed in one step by reactive flash sintering of their elemental constituents. Here we explore the temporal relationship between phase transformation and sintering by combining measurements of sintering with in situ measurements of phase transformation. The experiments are carried out under current rate, where flash is induced by injecting current and increasing it at a constant rate. We show that phase transformation of powders of magnesia and α‐alumina into single‐phase magnesium aluminate spinel was completed in 45 seconds, whereas sintering to full density required 60 seconds.