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Fluencia a alta temperatura de compuestos alúmina-circona

Authors: Calderón Moreno, J. M.; Domínguez Rodríguez, Arturo; Ramírez de Arellano López, Antonio;

Fluencia a alta temperatura de compuestos alúmina-circona

Abstract

Se ha estudiado la microestructura y la respuesta mecánica en compresión a alta temperatura de dos cerámicos de alúmina reforzada con circona (ZTA), fabricados mediante mezcla de polvos y mediante sol-gel con precursores de circona, para determinar la influencia del procesado. Las primeras presentan grandes aglomerados de partículas de circona y mayor tamaño de grano de alúmina, mientras que el material fabricado a partir de precursores presenta una microestructura más homogénea. Se han realizado ensayos en compresión a temperaturas entre 1300 y 1450 °C, tensiones desde 20 a 600 MPa, y velocidad de deformación de 2 x 10'^ s'^, encontrando fractura frágil a T 1400 °C para ambos tipos de microestructura.

Microstructure and high temperature compressive creep of tw^o ci cona toughened alumina (ZTA) ceramics, fabricated by pow^der processing and sol-gel precursors processing, has been studied, in order to determine the influence of processing. For the samples fabricated from powders, the microstructure is less homogeneous, with large agglomerates of circona, and greater alumina grain sizes. Compressive tests at temperatures between 1300 °C and 1400 °C, stresses between 20 and 600 MPa, at an strain rate of 2 x 10"^ s"^ have been carried out. Brittle fracture behavior was found for both materials below 1400 °C, and stationary plastic deformation above this temperature.

Country
Spain
Related Organizations
Keywords

Fluencia, Compuesto cerámico, Circona, Ceramic composites, ZTA, Creep, Alúmina

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green