Título:
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Degradation resistance of 3Y-TZP ceramics sintered using spark plasma sintering
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Autor/a:
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Kiran Chitapalli, Ravi; García Marro, Fernando; Valle Chiro, Jorge Antonio; Yan, Haixue; Reece, Michel; Anglada Gomila, Marcos Juan
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
Abstract:
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Commercially available tetragonal zirconia powder doped with 3 mol% of yttria has been sintered using spark plasma sintering (SPS) and has been investigated for its resistance to hydrothermal degradation. Samples were sintered at 1100, 1150, 1175 and 1600ºC at constant pressure of 100 MPa and soaking for 5 minutes, and the grain sizes obtained were 65, 90, 120 and 800 nm, respectively. Samples sintered conventionally with a grain size of 300 nm were also compared with samples sintered using SPS. Finely polished samples were subjected to artificial degradation at 131 0C for 60 hours in vapour in auto clave under a pressure of 2 bars.
The XRD studies show no phase transformation in samples with low density and small grain
size (<200 nm), but significant phase transformation is seen in dense samples with larger grain size (>300 nm). Results are discussed in terms of present theories of hydrothermal degradation. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials::Materials ceràmics -Condensed matter -- Structure -Condensed matter -- Thermal properties -Thin films -- Surfaces -3Y-TZP materials -Zirconia doped with yttria -Zircó -Matèria condensada -Làmines (Enginyeria) |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Artículo |
Editor:
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IOP Publishing. Institute of Physics
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