Scaling up the cold sintering process of ceramics
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in: Journal of the European Ceramic Society, Jahrgang 43, Nr. 12, 30.05.2023, S. 5319-5329.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Scaling up the cold sintering process of ceramics
AU - Jabr, Abdullah
AU - Jones, Haley N.
AU - Argüelles, Andrea P.
AU - Trolier-McKinstry, S.
AU - Randall, Clive A.
AU - Bermejo Moratinos, Raul
N1 - Publisher Copyright: © 2023 The Authors
PY - 2023/5/30
Y1 - 2023/5/30
N2 - The cold sintering process (CSP) densifies ceramics below 300 °C by utilizing a transient phase and applied pressure. Although CSP has been employed for densifying a variety of functional systems, their structural integrity does not always reach that of conventionally sintered parts. On the example of ZnO, this study aims to eliminate processing-induced defects that compromise the strength of cold sintered materials. Ultrasonic evaluation was employed for nondestructive detection of flaws prior to mechanical testing. Load transfer misalignments and fast heating rates were found as major sources of defects, impairing the mechanical strength. Based on these findings, multiple disc-shaped samples (13 mm diameter and ∼1.3 mm thickness) were cold sintered simultaneously using precisely aligned punches and slow heating rates. The obtained homogeneous densification, high relative density (>97%) and relatively high strength (∼120 MPa), i.e. two times superior to previously reported values, demonstrates the feasibility of scaling up the CSP towards industrial implementation.
AB - The cold sintering process (CSP) densifies ceramics below 300 °C by utilizing a transient phase and applied pressure. Although CSP has been employed for densifying a variety of functional systems, their structural integrity does not always reach that of conventionally sintered parts. On the example of ZnO, this study aims to eliminate processing-induced defects that compromise the strength of cold sintered materials. Ultrasonic evaluation was employed for nondestructive detection of flaws prior to mechanical testing. Load transfer misalignments and fast heating rates were found as major sources of defects, impairing the mechanical strength. Based on these findings, multiple disc-shaped samples (13 mm diameter and ∼1.3 mm thickness) were cold sintered simultaneously using precisely aligned punches and slow heating rates. The obtained homogeneous densification, high relative density (>97%) and relatively high strength (∼120 MPa), i.e. two times superior to previously reported values, demonstrates the feasibility of scaling up the CSP towards industrial implementation.
UR - http://www.scopus.com/inward/record.url?scp=85158868069&partnerID=8YFLogxK
U2 - https://doi.org/10.1016/j.jeurceramsoc.2023.04.061
DO - https://doi.org/10.1016/j.jeurceramsoc.2023.04.061
M3 - Article
VL - 43
SP - 5319
EP - 5329
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 12
ER -