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Structure‐property relations for a phase‐pure, nanograined tetragonal zirconia ceramic stabilized with minimum CaO doping
Author(s) -
Arun Aditya,
Kumar Lakshaman,
Chowdhury Anirban
Publication year - 2021
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.17683
Subject(s) - materials science , ceramic , tetragonal crystal system , sintering , raman spectroscopy , cubic zirconia , yttria stabilized zirconia , monoclinic crystal system , doping , phase (matter) , mineralogy , composite material , chemical engineering , crystallography , crystal structure , optics , chemistry , optoelectronics , physics , organic chemistry , engineering
Dense (~97%) CaO‐stabilized ZrO 2 ceramic was stabilized with minimum (3 mol%) doping (reported to date) and processed via conventional sintering at a low temperature (~1200°C); compositional analysis via X‐ray florescence confirmed the CaO doping accuracy. Phase‐pure tetragonal structure (characterized via both X‐ray diffraction and Raman spectroscopy) along with uniform nanograins (90 nm) of the ceramic ensured the evolution of no monoclinic phase even after vigorous low‐temperature degradation experiments (both thermal and hydrothermal aging for 80‐100 h). The sintered ceramic recorded a high hardness (~15 GPa); the indentation toughness value was also comparable to a 3 mol% yttria‐stabilized zirconia system. The remarkable structure–property correlations in the 3 mol% CaO‐stabilized ZrO 2 ceramic suggests that the same may be worth examining for suitable future applications (e.g., in dental ceramics).