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In‐situ measurements of lattice expansion related to defect generation during flash sintering
Author(s) -
Lebrun J.M.,
Hellberg C. S.,
Jha S. K.,
Kriven W. M.,
Steveson A.,
Seymour K. C.,
Bernstein N.,
Erwin S. C.,
Raj R.
Publication year - 2017
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.15071
Subject(s) - thermal expansion , lattice constant , materials science , tetragonal crystal system , sintering , zirconium , anisotropy , cluster expansion , lattice (music) , yttria stabilized zirconia , advanced photon source , cubic zirconia , crystal structure , diffraction , thermodynamics , composite material , chemistry , metallurgy , crystallography , ceramic , optics , physics , beam (structure) , beamline , acoustics
We report results from in‐situ measurements of lattice expansion during flash sintering of 3 mol% yttria stabilized tetragonal zirconia taken at the Advanced Photon Source, Argonne National Laboratory. The expansion is anisotropic, with the relative expansion of the a ‐lattice constant exceeding that of the c ‐lattice constant. The anisotropic expansion cannot be explained by thermal expansion and is consistent with predictions from ab‐initio calculations based upon the generation of vacancy‐interstitial pairs of zirconium and oxygen.