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Mostrando ítems 111-120 de 135
Artículo
Au/CeO2 metallic monolith catalysts: Influence of the metallic substrate
(World Gold Council, 2013)
Ceria-based gold catalysts were successfully deposited on ferritic stainless steel (Fecralloy) and aluminium monoliths. The prepared monolithic and reference powder catalysts were characterized by means of S BET, X-ray ...
Artículo
Selective UV Reflecting Mirrors Based on Nanoparticle Multilayers
(Wiley-VCH, 2013)
A new type of nanostructured selective ultraviolet (UV) reflecting mirror is presented. Periodic porous multilayers with photonic crystal properties are built by spin-coating-assisted layer-by-layer deposition of colloidal ...
Artículo
Long-chain polyhydroxyesters from natural occurring aleuritic acid as potential material for food packaging
(Taylor & Francis, 2015)
Fatty polyhydroxyesters (C≥16) are present in nature as barrier polymers like cutin in some protective tissues of higher plants. The mimicry of these biopolymers is regarded as a strategy to design nontoxic and fully ...
Artículo
Electrical properties of stoichiometric BiFeO3 prepared by mechanosynthesis with either conventional or spark plasma sintering
(Wiley, 2013)
Phase-pure powders of stoichiometric BiFeO3 have been prepared by mechanosynthesis. Ceramics sintered by either conventional heating in air or spark plasma sintering (SPS) followed by oxidative anneal in air are highly ...
Artículo
Exploring the benefits of depositing hard TiN thin films by non-reactive magnetron sputtering
(Elsevier, 2013)
The aim of this paper is to compare the mechanical and tribological properties of TiN coatings prepared in a conventional magnetron sputtering chamber according to two different routes: the usual reactive sputtering of a ...
Artículo
Creep behavior of TiCxN1-x-CoTi cermets synthesized by mechanically induced self-sustaining reaction
(Elsevier, 2011-03)
The plastic flow of TiCxN1−x–CoTi cermets has been investigated by uniaxial compression tests carried out in argon atmosphere at temperatures between 1100 and 1200 ◦C. Two different cermets, with 5 wt.% W or WC content ...
Artículo
Processing and characterisation of cermet/hardmetal laminates with strong interfaces
(Elsevier, 2014)
Cemented carbides and cermets are potential materials for high speed machining tools. However, cemented carbides are not chemically stable at high temperature and cermets present poor fracture toughness. Novel cermet/hardmetal ...
Artículo
Structural elucidation of Β-(Y,Sc) 2Si 2O 7: Combined use of 89Y MAS NMR and powder diffraction
(International Union of Crystallography, 2011-08)
Although the structures of pure Sc2Si2O7 and Β-Y 2Si 2O 7 have been described in the literature using the C2/m space group, 29Si magic angle spinning (MAS) NMR measurements of the intermediate members of the Sc 2Si 2O 7-Β- ...
Artículo
Preparation of ytterbium substituted BiFeO3 multiferroics by mechanical activation
(Elsevier, 2017)
Samples in the system Bi1−xYbxFeO3 (0.02 ≤ × ≤ 0.07) have for the first time been prepared by mechanical activation followed by sintering. XRD and DSC measurements show that the solubility limit of ytterbium in the R3c ...
Artículo
Nanosilica supported CaO: A regenerable and mechanically hard CO2 sorbent at Ca-looping conditions
(Elsevier, 2014)
This work presents a CO2 sorbent that may be synthesized from low-cost and widely available materials following a simple method basically consisting of impregnation of a nanostructured silica support with a saturated ...