Listar Departamento de Física Aplicada, Radiología y Medicina Física por autor "738c2306-8b43-4dab-982d-cddc99278708"
Mostrando ítems 1-16 de 16
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A critical assessment of the dislocation-driven model for superplasticity in yttria tetragonal zirconia polycrystals
Domínguez-Rodríguez, A.; Gómez García, Daniel; Castillo-Rodríguez, Miguel (The American Ceramic Society, 2008)In this paper, the origin of the threshold stress in pure 3 mol %-yttria tetragonal zirconia polycrystals (YTZP) is analysed in detail. At this regard, the two explanations reported in literature are discussed thoroughly. ... -
Analysis of a kink pair model applied to a peierls mechanism in basal and prism plane slips in sapphire (α-Al2O3) deformed between 200° and 1800°C
Castillo-Rodríguez, Miguel; Castaing, J.; Muñoz, A.; Veyssière, P.; Domínguez-Rodríguez, A. (The American Ceramic Society, 2008)A model based on dislocation glide controlled by the nucleation and propagation of kink pairs in a high Peierls stress crystal is revisited and modified to account for changes in dislocation densities and segment lengths ... -
Basal slip latent hardening by prism plane slip dislocations in sapphire (α-Al2O3)
Castillo-Rodríguez, Miguel; Muñoz, A.; Castaing, J.; Veyssière, P.; Domínguez-Rodríguez, A. (Elsevier, 2010)The properties of sapphire (α-Al2O3) predeformed at T = 1450 °C by 〈〉{} prism plane slip and subsequently deformed in 〈〉(0 0 0 1) basal slip between 1050 and 1250 °C were investigated. The critical resolved shear stress ... -
Chromium hardening and Peierls mechanism for basal slip in sapphire (α-Al2O3) at temperatures between 900 and 1500 °C
Castillo-Rodríguez, Miguel; Muñoz, A.; Castaing, J.; Veyssière, P.; Domínguez-Rodríguez, A. (European Ceramic Society, 2007)The plastic deformation of Cr3+-doped α-Al2O3 (ruby) with four distinct Cr concentrations has been studied at temperatures between 900 and 1500 °C. The mechanical tests indicate that the processes of dislocation multiplication ... -
Comparative study on high temperature mechanical behavior in 3YTZP containing SWCNTs or MWCNTs
Castillo-Rodríguez, Miguel; Muñoz, A.; Domínguez-Rodríguez, A. (Elsevier, 2016)Effects on mechanical properties of the presence of either single-walled carbon nanotubes (SWCNTs) or multi-walled carbon nanotubes (MWCNTs) in a 3YTZP matrix have been investigated in this work. Thus, monolithic 3YTZP and ... -
Correlation between microstructure and creep behavior in liquid-phase-sintered α-Silicon Carbide
Castillo-Rodríguez, Miguel; Muñoz, A.; Domínguez-Rodríguez, A. (The American Ceramic Society, 2006)The influence of increasing the sintering time from 1 to 7 h on the microstructure evolution and the mechanical properties at high temperature was studied in α-silicon carbide (α-SiC) sintered in argon atmosphere with ... -
Creep and microstructural evolution at high temperature of liquid-phase-sintered silicon carbide
Meléndez-Martínez, Juan J.; Castillo-Rodríguez, Miguel; Domínguez-Rodríguez, A.; Ortiz, Ángel L. (The American Ceramic Society, 2006)The compressive creep characteristics at 1625°C of liquid-phase-sintered silicon carbide ceramics containing 5 and 15 wt% of crystalline Y3Al5O12 (YAG) as the secondary phase were studied. In the two cases, strains between ... -
Creep study on alumina and alumina/SWCNT nanocomposites
Castillo-Rodríguez, Miguel; Muñoz, A.; Domínguez-Rodríguez, A. (Elsevier, 2018)Alumina and alumina/SWCNT nanocomposites have been sintered by spark plasma sintering, obtaining relative densities higher than 99%. Microstuctural characterization revealed a grain microstructure in the submicron range, ... -
Dislocation microstructure of 4H–SiC single crystals plastically deformed around the transition temperature
Lara, A.; Castillo-Rodríguez, Miguel; Muñoz, A.; Domínguez-Rodríguez, A. (The American Ceramic Society, 2012)4H–SiC specimens were plastically deformed by basal slip at temperatures between 800 °C and 1300 °C. Samples were investigated by means of transmission electron microscopy and high-resolution techniques. The accepted ... -
Dissociation of basal dislocations in 4H–SiC single crystals deformed around the transition temperature
Castillo-Rodríguez, Miguel; Lara, A.; Muñoz, A.; Domínguez-Rodríguez, A. (Wiley, 2013)The dislocation microstructure was studied in 4H–SiC samples plastically deformed by basal slip activation around the transition temperature (1000°C–1100°C). Dissociation of basal dislocations takes place over a wide ... -
Effect of atmosphere and sintering time on the microstructure and mechanical properties at high temperatures of alpha-SiC sintered with liquid phase Y2O3-Al2O3
Castillo-Rodríguez, Miguel; Muñoz, A.; Domínguez-Rodríguez, A. (Elsevier, 2006)The influence that the atmosphere (N2 or Ar) and sintering time have on microstructure evolution in liquid-phase-sintered α-SiC (LPS-α-SiC) and on its mechanical properties at high temperature was investigated. The ... -
High-temperature deformation mechanisms in monolithic 3YTZP and 3YTZP containing single-walled carbon nanotubes
Castillo-Rodríguez, Miguel; Muñoz, A.; Domínguez-Rodríguez, A. (Wiley, 2015)Monolithic 3YTZP and 3YTZP containing 2.5 vol% of single-walled carbon nanotubes (SWCNT) were fabricated by Spark Plasma Sintering (SPS) at 1250°C. Microstructural characterization of the as-fabricated 3YTZP/SWCNTs composite ... -
Influence of the processing route on the carbon nanotubes dispersion and creep resistance of 3YTZP/SWCNTs nanocomposites
Castillo-Rodríguez, Miguel; Muñoz, A.; Morales-Rodríguez, Ana; Poyato, Rosalía; Gallardo-López, Ángela; Domínguez-Rodríguez, A. (The American Ceramic Society, 2014)3YTZP matrix composites containing 2.5 vol% of single-walled carbon nanotubes (SWCNT) were fabricated by Spark Plasma Sintering (SPS) at 1250°C, following different processing routines with the aim of optimizing the SWCNTs ... -
Microestructura y propiedades mecánicas a altas temperaturas del α-SiC sinterizado con fase líquida de Y2O3-Al2O3
Castillo-Rodríguez, Miguel; Muñoz, A.; Domínguez-Rodríguez, A. (Sociedad Española de Cerámica y Vidrio, 2005)Muestras de α-SiC han sido sinterizadas con fase líquida (LPS) a 1950 ºC, en atmósfera de argón y tiempos de procesado entre 1 y 7 horas. Mediante microscopia electrónica de barrido (SEM) se ha caracterizado la microestructura, ... -
α-Al2O3 sapphire and rubies deformed by dual basal slip at intermediate temperatures (900–1300 °C): I. Dislocation organization
Castillo-Rodríguez, Miguel; Castaing, J.; Muñoz, A.; Veyssière, P.; Domínguez-Rodríguez, A. (Elsevier, 2009)Under a load orientation that hinders twinning and impedes fracture, sapphire and Cr-doped α-Al2O3 single crystals (rubies) were deformed from 1500 °C to slightly above the brittle to ductile transition temperature of 900 ... -
α-Al2O3 sapphire and rubies deformed by dual basal slip at intermediate temperatures (900–1300 °C): II. Dissociation and stacking faults
Castillo-Rodríguez, Miguel; Castaing, J.; Muñoz, A.; Veyssière, P.; Domínguez-Rodríguez, A. (Elsevier, 2009)Sapphire and rubies (undoped and Cr-doped α-Al2O3 single crystals) have been deformed in compression at temperatures lower than those previously used in studies of dislocations in the basal slip plane. Above 1400 °C, several ...