Artículo
High temperature mechanical properties of polycrystalline Y2SiO5
Título alternativo | Propiedades mecánicas a alta temperatura del Y2SiO5 policristalino |
Autor/es | Cabezas Rodríguez, Rafael
Ciria Matamoros, Desiree Martínez Fernández, Julián Dezanneau, Guilhem Karolak, Fabienne Ramírez Rico, Joaquín |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2021 |
Fecha de depósito | 2022-07-18 |
Publicado en |
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Resumen | The high temperature mechanical properties of polycrystalline Y2SiO5 were studied in compression at temperatures in the range of 1200–1400 °C, both in constant strain rate and constant stress experiments. To examine the ... The high temperature mechanical properties of polycrystalline Y2SiO5 were studied in compression at temperatures in the range of 1200–1400 °C, both in constant strain rate and constant stress experiments. To examine the effect of grain size on the plastic deformation, two routes were used for the synthesis and sintering of Y2SiO5: one of solid state reaction followed by conventional sintering in air, and one of sol–gel synthesis followed by spark-plasma sintering, resulting in starting grain sizes of 2.2 and 0.9 μm, respectively. Ceramics obtained by these routes exhibited different high-temperature compression behavior: while the conventionally processed ceramic exhibited grain growth during mechanical testing and a stress exponent close to one, compatible with diffusional creep, the spark-plasma sintered ceramic showed no grain growth but significant cavitation, a stress exponent close to two and partially superplastic behavior. These results have implications for the design and lifetime assessment of rare earth silicate-based environmental barrier coatings. |
Cita | Cabezas Rodríguez, R., Ciria Matamoros, D., Martínez Fernández, J., Dezanneau, G., Karolak, F. y Ramírez Rico, J. (2021). High temperature mechanical properties of polycrystalline Y2SiO5. Boletín de la Sociedad Española de Cerámica y Vidrio, 61 (S1), S60-S68. |
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