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In situ characterization of ceramic cold sintering by small-angle scattering

: Allen, A.J.; Levin, I.; Maier, R.A.; Witt, S.E.; Zhang, F.; Kuzmenko, I.


Journal of the American Ceramic Society 104 (2021), Nr.6, S.2442-2448
ISSN: 0002-7820
ISSN: 1551-2916
Fraunhofer CCD ()

The first in situ characterization of the pore morphology evolution during the cold sintering process (CSP) is presented using small-angle X-ray scattering methods. For practical reasons, measurements have been made on a model system, KH2PO4 (KDP). The scattering signal revealed a striking behavior that could be modeled with nanoscale structural features associated with the dissolution and reprecipitation of KDP close to the grain/pore interface during CSP. The prospects for future more quantitative experiments under a range of temperature and pressure conditions, as well as for studies of more technologically important materials such as ZnO are considered.