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Postsintering Hot Isostatic Pressing of Ceria‐Doped Tetragonal Zirconia/Alumina Composites in an Argon–Oxygen Gas Atmosphere
Author(s) -
Sato Tsugio,
Endo Tadashi,
Shimada Masahiko
Publication year - 1989
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/j.1151-2916.1989.tb06213.x
Subject(s) - hot isostatic pressing , materials science , fracture toughness , cubic zirconia , composite material , hot pressing , grain growth , sintering , flexural strength , dispersion (optics) , tetragonal crystal system , thermal shock , grain size , metallurgy , ceramic , phase (matter) , chemistry , organic chemistry , physics , optics
Ceria‐doped tetragonal zirconia (Ce‐TZP)/alumina (Al 2 O 3 ) composites were fabricated by sintering at 1450° to 1600°C in air, followed by hot isostatic pressing (postsintering hot isostatic pressing) at 1450°C and 100 MPa in an 80 vol% Ar–20 vol% O 2 gas atmosphere. Dispersion of Al 2 O 3 particles into Ce‐TZP was useful in increasing the relative density and suppressing the grain growth of Ce‐TZP before hot isostatic pressing, but improvement of the fracture strength and fracture toughness was limited. Postsintering hot isostatic pressing was useful to densify Ce‐TZP/Al 2 O 3 composites without grain growth and to improve the fracture strength and thermal shock resistance.