Listar IIT por autor "0000-0002-6522-8810"
Mostrando ítems 41-55 de 55
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Micro-macro asymptotic approach applied to heterogeneous elastic micropolar media. Analysis of some examples
Espinosa-Almeyda, Yoanh; Sánchez Valdés, César Fidel; Rodríguez-Ramos, R.; Yanes, V.; Otero, J.A.; Sabina, F.J.; Lebon, F. (2022-01-29)In this work, the derivation of the effective properties for heterogeneous micropolar media with periodic structure using the two-scale asymptotic homogenization method (AHM) is reported. Analytical expressions for the ... -
Micromechanical characterization of quasi-periodic multi-laminated cosserat elastic composites
Espinosa-Almeyda, Yoanh (2023-08-17)Micromechanical models based on Solid Mechanics have been efficient tools for the theoretical study of multiphase composite materials. Their results contribute to materials characterization mechanisms, to define ... -
Ni-Co-Mn-Sn quaternary alloys: magnetic hysteresis loss reduction and ductility enhancement by iron alloying
Chen, F. (2019-09-01)The influence of Fe-alloying on the structural transition temperatures, microstructure, and mechanical and magnetocaloric properties of polycrystalline Ni41Co9−xFexMn40Sn10 (at. %) (x = 0–3) alloys has been studied. The ... -
On the synthesis, structural transformation and magnetocaloric behavior of Ni37.5Co12.5Mn35Ti15 melt-spun ribbons
Sánchez Valdés, César Fidel; López-Cruz, M.; Zamora, J.; Sánchez Llamazares, J.L. (2021-01-06)We fabricated Ni37.5Co12.5Mn35Ti15 melt-spun ribbons at linear wheel speeds (WS) of 20 and 8 ms-1 (series A and B, respectively). The effect of a short time thermal annealing (30 min.) between 1023 K and 1173 K on the ... -
Overall properties for elastic micropolar heterogeneous laminated composites with centro-symmetric constituents
Espinosa-Almeyda, Yoanh (Springer, 2023-04-12)In this work, the effective properties of multi-phase periodic laminated Cosserat composite are computed by means of the two-scale asymptotic homog- enization method (AHM). The statements of the local problems and the ... -
Phase transformation and magnetocaloric effect of Co-doped Mn–Ni–In melt-spun ribbons
Sánchez Valdés, César Fidel; Yang, Yiqiao; Li, Zongbin; Sánchez Llamazares, José Luis; Yang, Bo; Zhang, Yudong; Esling, Claude; Zhao, Xiang; Zuo, Liang (2020-08-06)Ribbon-shaped magnetocaloric materials are favorable to achieve high heat-transfer efficiencies due to their large specific surface area. In this work, Mn50Ni41−xIn9Cox (0 ≤ x ≤ 4) ribbons were prepared using a melt-spinning ... -
Phase transition and magnetocaloric properties of Mn50Ni42-xCoxSn8 (0 < x < 10) melt-spun ribbons
Li, Zongbin (2018-01-01)The characteristics of magnetostructural coupling play a crucial role in the magnetic field-driven behaviour of magnetofunctional alloys. The availability of magnetostructural coupling over a broad temperature range is of ... -
Superparamagnetic state in La0.7Sr0.3MnO3 thin films obtained by rf-sputtering
Sánchez Valdés, César Fidel (2020-02-13)A novel superparamagnetic state has been observed in high quality La0.7Sr0.3MnO3 (LSMO) thin films directly grown by rf-sputtering on SiOx/Si(100) substrates. The films are nanostructured without grain boundaries, constituted ... -
Synthesis by rapid solidification and sparkplasma sintering of single-phase DyNi5
Sánchez Valdés, César Fidel; Pérez Batalla, Rubén Uziel; Sánchez Llamazares, José Luis (2023-08-17)Theoretical and experimental studies show that the binary compounds RNi5,with R = Tb, Dy, Ho, and Er, are attractive magnetic materials for magnetic refrigerationin the temperature range of H2 liquefaction. For such a ... -
Synthesis, structural, and magnetic properties of Heusler-type Mn2-xFe1+xGe (0.0 ≤ x ≤ 1.0) alloys
Sánchez Valdés, César Fidel; Aryal, Anil; Dubenko, Igor; Zamora, J.; Sánchez Llamazares, J.L.; Mazumdar, Dipanjan; Talapatra, Saikat; Stadler, Shane; Ali, Naushad (2021-07-21)Bulk Mn2-xFe1+xGe (0.0 ≤ x ≤ 1.0) alloys have been synthesized by arc-melting followed by a low temperature homogenization thermal annealing, whereas for comparison purposes the Mn2FeGe alloy was also produced in ribbon ... -
The effect of chemical attack on structural and magnetic properties of FeRh bulk alloys
Sánchez Valdés, César Fidel; Arreguin, Maria; Sánchez Llamazares, José Luis (2023-08-17)The Fe100-xRhx alloys (48 ≤ x ≤ 52 at%), present a Magnetocaloric Effect (MCE) close to room temperature (RT), and first-order phase transition from antiferromagnetic (AFM) to ferromagnetic (FM) state during heating and ... -
The effect of cooling rate on magnetothermal properties of Fe49Rh51
Sanchez Valdes, Cesar Fidel (2020)We have investigated the effects of quenching rate on the thermal dependence of the magnetic entropy change ΔSM(T) and the magnetic field induced hysteresis loss through the antiferromagnetic (AFM) ↔ ferromagnetic (FM) ... -
Tuning the reversible magnetocaloric effect in Ni-Mn-In based alloys through Co and Cu co-doping
Li, Zongbin (2019-03-01)The reversibility of the giant magnetocaloric effect (MCE) through the magnetic field–induced magnetostructural transformation in Ni–Mn–In‐based alloys is a key issue towards the potential magnetic refrigeration applications. ... -
Unveiling quantum superparamagnetism by interacting monodomains in multiferroic Er-doped bismuth ferrate nanostructured particles
Sánchez Valdés, César Fidel; Sharma, Subhash; Sánchez Llamazares, J. L.; Siqueiros, J. M.; Raymond Herrera, Oscar (2021-03-15)In the last few years, the quantum superparamagnetic (QSP) phenomenon has been reported in isolated ultrasmall nanoparticles. In this work, a QSP state and superparamagnetic (SP) state in nanostructured Er-doped BiFeO3 ... -
Wide structural and magnetic successive transitions and related magnetocaloric properties in a directionally solidified polycrystalline Ni-Co-Mn-In alloy
Sánchez Valdés, César Fidel; Chen, F.; Sánchez Llamazares, J. L.; Müllner, P.; Tong, Y. X.; Li, L. (2020-02-21)We fabricated a Ni45Co6.4Mn37In11.6 polycrystalline sample with a specific texture by directional solidification. The alloy is characterized by wide successive structural and magnetic phase transitions that considerably ...