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Mostrando ítems 61-70 de 82
Artículo
Anomalous high activation energy for creep in nanostructured 3YTZP/Ni cermets
(Elsevier, 2007)
The plastic behavior of cermets based on a 3 mol% yttria-stabilized tetragonal zirconia matrix that incorporates nanometric nickel inclusions (3YTZP/n-Ni), with 2.5, 5 and 10 vol.% of nickel content, has been studied by ...
Artículo
Fluencia a alta temperatura de compuestos alúmina-circona
(1996)
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 ...
Artículo
Pure diffusional creep of NiO polycrystals
(European Physical Society (EPS), 1983)
Compressive creep testing of polycrystalline NiO has been performed in air and argon, at temperatures between 1 100 and 1 500 °C (0.61 to 0.79 TM) under loads corresponding to initial applied stresses from 6 to 90 MPa. ...
Artículo
Cation-driven electrical conductivity in Ta-doped orthorhombic zirconia ceramics
(Elsevier, 2021)
This paper is devoted to the study of the electrical conductivity of tantalum-doped zirconia ceramics prepared by spark plasma sintering. In this study, the temperature dependence of conductivity in as-prepared specimens ...
Artículo
Plastic deformation at high temperatures of pure and Mn-doped GaSb
(2001)
In this work the plastic behavior of GaSb and Mn-doped GaSb at high temperature has been analyzed. Several experiments at different constant load and temperatures around 500 °C were carried out. The parameters used in the ...
Artículo
Artículo
Activation entropy and Gibbs free energy for conduction in yttria–stabilized-zirconia single crystals
(American Physical Society, 1995)
The temperature dependence of the activation Gibbs free energy [ΔG(T)] and entropy [ΔS(T)] associated with electric conduction in 12 mol % yttria–stabilized-zirconia single crystals was analyzed. In order to determine the ...
Artículo
Comportamiento eléctrico de monocristales 4.7mol%Y-PSZ
(1998)
La función respuesta escalón de Kohlrausch-Williams-Watts ha permitido incorporar la contribución dieléctrica a la res-puesta eléctrica de los monocristales Y2O3 - Zr02. El modelo de divergencia infrarroja permite interpretar ...
Artículo
Creep behavior of TiCxN1-x-CoTi cermets synthesized by mechanically induced self-sustaining reaction
(Elsevier, 2011-03)
The plastic flow of TiCxN1−x–CoTi cermets has been investigated by uniaxial compression tests carried out in argon atmosphere at temperatures between 1100 and 1200 ◦C. Two different cermets, with 5 wt.% W or WC content ...
Artículo
Estructura de dislocaciones en ZRO2 totalmente estabilizado deformado a alta temperatura
(1989)
Se ha estudiado por microscopía electrónica de transmisión la microestructura de deformación a altas temperaturas (1.300-1.550°C) de monocristales de Zr02-Y203 totalmente estabilizados. La variación observada en la ...