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Cubic Phase Stabilization of Translucent Yttria‐Zirconia at Very Low Temperatures
Author(s) -
MAZDIYASNI K. S.,
LYNCH C. T.,
II J. S. SMITH
Publication year - 1967
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.1151-2916.1967.tb14989.x
Subject(s) - yttrium , materials science , yttria stabilized zirconia , cubic zirconia , sintering , zirconium , grain size , thermal decomposition , phase (matter) , thermal expansion , zirconium dioxide , oxide , mineralogy , decomposition , grain growth , analytical chemistry (journal) , chemical engineering , metallurgy , ceramic , chemistry , organic chemistry , chromatography , engineering
Simultaneous decomposition of yttrium and zirconium alkozides was used to obtain an almost ideal mixture of powders of high surface activity. From this powder a translucent body, “Zyttrite,” was made with a grain size of less than 1μ. The mixed oxide was consolidated into a stabilized body by firing at 1000°C for 30 min. This is indicative of a phenomenal increase in solid state reactivity. High‐density fully stabilized cubic solid solutions of 6 mole % Y 2 O 3 ‐ZrO 2 were obtained on sintering at 1450°C. A typical specimen had a density of 5.9 g/cm 3 , a coefficient of thermal expansion of 11 × 10 −6 in./in.°C, and a grain size of 2 to 4μ. Test pieces withstood 2200°C firings in air for 262 hr with grain growth of 35 to 50μ and virtually no change in composition, density, or stabilization.