Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 104, Issue 7, Pages 3497-3507Publisher
WILEY
DOI: 10.1111/jace.17683
Keywords
CaO-stabilized ZrO2; ceramics; hardness; powder processing; toughness
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Funding
- Indian Institute of Technology Patna
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This study introduced a high-density CaO-stabilized ZrO2 ceramic with exceptional hardness and stability after minimal doping and conventional sintering, suggesting potential for future applications.
Dense (similar to 97%) CaO-stabilized ZrO2 ceramic was stabilized with minimum (3 mol%) doping (reported to date) and processed via conventional sintering at a low temperature (similar to 1200 degrees 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 (similar to 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 ZrO2 ceramic suggests that the same may be worth examining for suitable future applications (e.g., in dental ceramics).
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