Open AccessInvestigating the effect of yttria contents on the structure and mechanical properties of zirconia ceramics
Author(s) -
Linh Ba Ngoc Nguyen,
Dung Van Hoang,
Van Thi Thanh Tran
Publication year - 2016
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v19i4.685
Subject(s) - yttria stabilized zirconia , materials science , yttrium , cubic zirconia , raman spectroscopy , tetragonal crystal system , annealing (glass) , monoclinic crystal system , grain size , ceramic , precipitation , doping , chemical engineering , metallurgy , crystallography , crystal structure , chemistry , physics , optoelectronics , meteorology , optics , engineering , oxide
In this study, the co- precipitation method and annealing process were used to prepare the yttria stabilized zirconia ceramics. Data of Raman and XRD showed that an increase of yttria doping leads to an decrease of the ratio between monoclinic and tetragonal phases. Howerver, it existed a critical concentration of yttrium at which the highest value of hardness was about 14.5 GPa and grain sizes of 0.2–0.5 m. An investigation of low temperature degradation indicated that theaging process only occurred in the first 5 hours and then virtually negligible changes.