Browsing DFisA-Artículos, capítulos... by Author "314bbd80-dbbc-435b-b60f-f21e953a0b5e"
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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. ... -
Additive-free superhard B4C with ultrafine-grained dense microstructures
Moshtaghioun, B. Malmal; Cumbrera, Francisco L.; Ortiz, Ángel L.; Castillo-Rodríguez, Miguel; Gómez-García, Diego (The American Ceramic Society, 2014)A unique combination of high-energy ball-milling, annealing, and spark-plasma sintering has been used to process superhard B4C ceramics with ultrafine-grained, dense microstructures from commercially available powders, ... -
Advancing sustainable education: design a novel steams model integrating technical and psychological factors
Navarro-Espinosa, Johanna Andrea; Muñoz-Rodríguez, David; Castillo-Rodríguez, Miguel; Perea-Moreno, Alberto Jesús; Martínez-Jiménez, Pilar; Aparicio-Martínez, Pilar (IATED Publications, 2024)Over the past decade, the integration of Science, Technology, Engineering, MathemaICTs, and Social Sciences (STEAM) disciplines into educational models has emerged as a crucial aspect of preparing future generations. This ... -
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 ... -
Controlled photodeposition of Pt onto TiO2-g-C3N4 systems for photocatalytic hydrogen production
Herrera-Beurnio, M. Carmen; López Tenllado, Francisco Javier; Hidalgo-Carrillo, J.; Martín-Gómez, Juan; Estévez, R.; Castillo-Rodríguez, Miguel; Miguel, Gustavo de; Urbano, Francisco José; Marinas, Alberto (Elsevier, 2022)Platinum (0.5 wt. %) was photodeposited on g-C3N4-TiO2 systems using UV or Vis light. Different absorption by semiconductors seemed to somehow influence resulting platinum particle size and distribution. Thus, lower platinum ... -
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, ... -
Deformation mechanism map of Cu/Nb nanoscale metallic multilayers as a function of temperature and layer thickness
Snel, J.; Monclús, M. A.; Castillo-Rodríguez, Miguel; Mara, N.; Beyerlein, I. J.; Llorca, J.; Molina-Aldareguía, J. M. (Cornell University, 2017)The mechanical properties and deformation mechanisms of Cu/Nb nanoscale metallic multilayers (NMMs) manufactured by accumulative roll bonding (ARB) are studied at 25C and 400C. Cu/Nb NMMs with individual layer thicknesses ... -
Dislocation dissociation and stacking-fault energy calculation in strontium titanate
Castillo-Rodríguez, Miguel; Sigle, W. (Elsevier, 2010)The dislocation microstructure of strontium titanate plastically deformed below room temperature shows dipolar configurations of a〈1 1 0〉 screw dislocations. The dipole height is so small that dipole annihilation is expected. ... -
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 ... -
Educational innovation: exploring flipped classroom in the context of experimental practices
Muñoz-Rodríguez, David; Castillo-Rodríguez, Miguel; Aparicio-Martínez, Pilar; Perea-Moreno, Alberto Jesús; Martínez-Jiménez, Pilar (IATED Publications, 2024)The Flipped Classroom methodology has emerged as an innovative educational approach, particularly at the university level. This pedagogical strategy involves students engaging with pre-assigned study material prior to ... -
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 ... -
Effect of the heat treatment on the mechanical properties and microstructure of Scalmalloy® manufactured by Selective Laser Melting (SLM) under certified conditions
Cabrera-Correa, Leticia; González-Rovira, Leandro; López-Castro, Juan de Dios; Castillo-Rodríguez, Miguel; Botana, F. Javier (Elsevier, 2023)Mechanical properties and microstructure of Scalmalloy® processed by Selective Laser Melting (SLM) under certified conditions are studied. Two types of samples are considered: as-built and heat-treated at 325 °C for 4 h. ... -
High temperature internal friction in a Ti–46Al–1Mo–0.2Si intermetallic, comparison with creep behaviour
Castillo-Rodríguez, Miguel; Nó, M.L.; Jiménez, J.A.; Ruano, O.A.; San Juan, J. (Elsevier, 2016)Advanced γ-TiAl based intermetallics Mo-bearing have been developed to obtain the fine-grained microstructure required for superplastic deformation to be used during further processing. In the present work we have studied ... -
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 ...