Artículo
Tetragonal-cubic phase boundary in nanocrystalline ZrO2-Y 2O3 solid solutions synthesized by gel-combustion
Fabregas, Ismael Oscar
; Craievich, Aldo F.; Fantini, Márcia C. A.; Millen, Ricardo P.; Temperini, Márcia L.A.; Lamas, Diego Germán
Fecha de publicación:
04/2011
Editorial:
Elsevier Science Sa
Revista:
Journal of Alloys and Compounds
ISSN:
0925-8388
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
By means of synchrotron X-ray powder diffraction (SXPD) and Raman spectroscopy, we have detected, in a series of nanocrystalline and compositionally homogeneous ZrO2-Y2O3 solid solutions, the presence at room temperature of three different phases depending on Y2O3 content, namely two tetragonal forms and the cubic phase. The studied materials, with average crystallite sizes within the range 7-10 nm, were synthesized by a nitrate-citrate gel-combustion process. The crystal structure of these phases was also investigated by SXPD. The results presented here indicate that the studied nanocrystalline ZrO2-Y 2O3 solid solutions exhibit the same phases reported in the literature for compositionally homogeneous materials containing larger (micro)crystals. The compositional boundaries between both tetragonal forms and between tetragonal and cubic phases were also determined.
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Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Articulos(UNIDEF)
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Citación
Fabregas, Ismael Oscar; Craievich, Aldo F.; Fantini, Márcia C. A.; Millen, Ricardo P.; Temperini, Márcia L.A.; et al.; Tetragonal-cubic phase boundary in nanocrystalline ZrO2-Y 2O3 solid solutions synthesized by gel-combustion; Elsevier Science Sa; Journal of Alloys and Compounds; 509; 16; 4-2011; 5177-5182
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