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Strengthening of Ceria‐Doped Tetragonal Zirconia Polycrystals by Reduction‐Induced Phase Transformation
Author(s) -
Heussner KarlHeinz,
Claussen Nils
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.tb06267.x
Subject(s) - materials science , tetragonal crystal system , cubic zirconia , phase (matter) , doping , compressive strength , composite material , mineralogy , metallurgy , ceramic , chemistry , optoelectronics , organic chemistry
Phase‐transformation‐induced compressive surface stresses were introduced into ceria‐doped tetragonal zirconia polycrystals by reduction of CeO 2 . Four‐point‐bending strength of sintered ZrO 2 containing 12 mol% CeO 2 increased from 240 to 545 MPa after it was annealed at 1400°C for 2 h in nitrogen. The strength of the same material hot isostatically pressed in oxygen increased after it was annealed in nitrogen for 2 h at 1500°C from 430 to 595 MPa.