Buscar
Mostrando ítems 1-10 de 293
Respuesta eléctrica de Nanocristales ZrO2-3mol% Y2O3 [Artículo]
(Sociedad Española de Cerámica y Vidrio, 1999)
Se ha estudiado la evolución con los tratamientos térmicos de la microestructura y el comportamiento eléctrico de nanocristales ZrO2 – 3mol% Y2O3.La muestra, que inicialmente estaba compuesta por 77.8%wt de fase tetragonal ...
Comparación del comportamiento mecánico a altas temperaturas entre nanocerámicos de Y-TZP y materiales submicrométricos [Artículo]
(2001)
Se han realizado experiencias de fluencia en compresión a alta temperatura en muestras de óxido de circonio parcialmente estabilizado con 2,7 mol % de óxido de itrio (Y-TZP), con distintos tamaños de grano para ver la ...
Mössbauer study of FeCoSiAlGaPCB amorphous alloys [Artículo]
(2004)
A Mössbauer spectrometry and magnetic study have been performed on FeCoSiAlGaPCB amorphous alloys in order to get information about the variations in the atomic short range order with the substitution of Fe by Co. The ...
Correlation between microstructure and temperature dependence of magnetic properties in Fe 60 Co 18 ( Nb , Zr ) 6 B 15 Cu 1 alloy series [Artículo]
(AIP Publishing, 2009-05-14)
Temperature dependence of magnetic properties of nanocrystalline Fe60Co18Cu1B15Nb6−xZrx (x =0, 3, 6) alloys has been studied at different stages of devitrification. Transmission electron microscopy shows nanocrystals of ...
Deformation of MgO by Vickers microindentation tests [Artículo]
(EDP Sciences, 1982)
Vickers microhardness tests have been performed at room temperature on (100), (110), and (111) MgO faces for various orientations of the pyramid diagonal. The indentations may be deformed probably because of cracking. ...
Field dependence of the adiabatic temperature change in second order phase transition materials: Application to Gd [Artículo]
(AIP Publishing, 2009-11-19)
The field dependence of the adiabatic temperature change LlTad of second order phase transition materials is studied, both theoretically and experimentally. Using scaling laws, it is demonstrated that, at the Curie ...
Plastic deformation of CoO single crystals [Artículo]
(EDP Sciences, 1980)
Constant strain rate compressions along < 001 > have been performed on CoO single crystals (ε ∼ 6 x 10-5 s-1). Yield stresses and work hardening rates have been measured between 77 K and 1 400 K; CoO is very strong when ...
Refrigerant capacity of FeCrMoCuGaPCB amorphous alloys [Artículo]
(2006)
The magnetocaloric effect of the FeCrMoCuGaPCB alloy series, suitable for being prepared as bulk amorphous alloys, has been studied. Optimal refrigeration cycles have a cold reservoir close to room temperature. The ...
Plastic deformation at high temperatures of pure and Mn-doped GaSb [Artículo]
(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 ...
Fluencia en compresión de compuestos de AI2O3-SIC con distintas geometrías de reforzante [Artículo]
(1997)
Se ha analizado la fluencia en compresión de un compuesto cerámico con matriz de alúmina reforzada con un 30% en volumen de plaquetas de SiC. Los ensayos se realizaron a 1400 °C, con velocidades de deformación entre 10'^ ...