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Mostrando ítems 1-10 de 15
Artículo
A New Method for Determining the Curie Temperature From Magnetocaloric Measurements
(Institute of Electrical and Electronics Engineers, 2016)
A new method is proposed for determining the Curie temperature from magnetocaloric measurements. It is based on the field dependence of the magnetic entropy change close to the Curie temperature. The main advantages over ...
Artículo
Monolithic supports based on biomorphic SiC for the catalytic combustion of hydrogen
(Royal Society of Chemistry, 2016)
Catalytic hydrogen combustion was studied with H2/air mixtures in conditions that simulate the H2 concentration of the exhaust gases from fuel cells (3–4% v/v H2 in air). Pt-impregnated monoliths based on porous biomorphic ...
Artículo
A unified approach to describe the thermal and magnetic hysteresis in Heusler alloys
(American Institute of Physics Publising LLC, 2016)
Different excitations, like temperature, magnetic field, or pressure, can drive a martensitic transition in Heusler alloys. Coupled phenomena in these materials lead to interesting magnetocaloric and barocaloric effects ...
Artículo
Anisotropy field distribution in soft magnetic Hitperm alloys submitted to different field annealing processes
(Elsevier, 2016)
The magnetic anisotropy field distribution is discussed for Hitperm alloys annealed under different field conditions leading to different induced magnetic anisotropies: zero (ZF), transversal (TF), and longitudinal (LF) ...
Artículo
Magnetocaloric response of amorphous and nanocrystalline Cr-containing Vitroperm-type alloys
(Elsevier, 2016)
The broad compositional range in which transition metal (TM) based amorphous alloys can be obtained, yields an easily tunable magnetocaloric effect (MCE) in a wide temperature range. In some TM-based alloys, anomalous ...
Artículo
Enhanced carbon nanotube dispersion in 3YTZP/SWNTs composites and its effect on room temperature mechanical and electrical properties
(Elsevier, 2016-10)
In this work, several modifications of the colloidal processing technique and spark plasma sintering (SPS) to prepare yttria tetragonal zirconia composites (YTZP) with single walled carbon nanotubes (SWNT) have been ...
Artículo
Biological strategy for the fabrication of highly ordered aragonite helices: the microstructure of the cavolinioidean gastropods
(Nature Publishing Group, 2016)
The Cavolinioidea are planktonic gastropods which construct their shells with the so-called aragonitic helical fibrous microstructure, consisting of a highly ordered arrangement of helically coiled interlocking continuous ...
Artículo
Avalanche criticalities and elastic and calorimetric anomalies of the transition from cubic Cu-Al-Ni to a mixture of 18R and 2H structures
(American Physical Society, 2016)
We studied the two-step martensitic transition of a Cu-Al-Ni shape-memory alloy by calorimetry, acoustic emission (AE), and resonant ultrasound spectroscopy (RUS) measurements. The transition occurs under cooling from the ...
Artículo
Optimal temperature range for determining magnetocaloric magnitudes from heat capacity
(Institute of Physics Publishing, 2016)
The determination of the magnetocaloric magnitudes (specific magnetic entropy change, Δs M, and adiabatic temperature change, ΔT ad) from heat capacity (c H) measurements requires measurements performed at very low ...
Artículo
Colloidal crystals and water: Perspectives on liquid–solid nanoscale phenomena in wet particulate media
(Elsevier BV, 2016)
Solid colloidal ensembles inherently contain water adsorbed from the ambient moisture. This water, confined in the porous network formed by the building submicron spheres, greatly affects the ensemble properties. Inversely, ...