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Mostrando ítems 1-10 de 21
Artículo
The cluster model: A hierarchically-ordered assemblage of random-packing spheres for modelling microstructure of porous materials
(Elsevier, 2008)
A new structural model based on the premises widely used for describing the structure of random materials, and especially aerogels, is introduced. Aerogels are described as an assemblage of randomly-packed spheres in several ...
Artículo
Bioactivity of wollastonite/aerogels composites obtained from a TEOS-MTES matrix
(Springer Nature, 2008)
Organic-inorganic hybrid materials were synthesized by controlled hydrolysis of tetraethoxysilane (TEOS), methyltrimethoxysilane (MTES), synthetic wollastonite powders and polydimethylsiloxane (PDMS) in an ethanol solution. ...
Artículo
Tailoring of magnetocaloric response in nanostructured materials: Role of anisotropy
(2008-03-25)
The magnetocaloric response of an ensemble of oriented uniaxial magnetic objects, perpendicularly magne- tized to their easy axes, for temperatures close to the blocking temperature is calculated with the aim of demonstrating ...
Artículo
Influence of Mn content on the microstructure and hyperfine interaction parameters of amorphous and nanocrystalline Hitperm-type FeCoMnNbB alloys.
(Russian Academy of Sciences, 2008)
Effects of Mn addition on the devitrification kinetics, microstructure and hyperfine inter- action parameters of FeCoMnNbB alloys were investigated. As-cast and nanocrystalline samples were studied by different experimental ...
Artículo
High-temperature plastic behavior of TZP-Ni cermets
(Wiley-Blackwell, 2008-02)
The creep behavior of tetragonal zirconia TZP-Ni cermets with metal contents below, close to, and above the percolation limit has been studied. Compressive creep tests were performed on as-received materials and samples ...
Artículo
Microstructure and Magnetic Properties of Mo Containing Nanoperm-Type Alloys
(Russian Academy of Sciences, 2008)
The influence of composition changes on the devitrification process, microstructure and magnetic properties of (Fe,Co)MoB(Cu) alloys was investigated. Amorphous and nanocrystalline samples were studied by differential ...
Artículo
Mechanical alloying of Fe100−x−yNbxBy (x = 5, 10; y = 10, 15): from pure powder mixture to amorphous phase
(Elsevier, 2008)
The mechanical alloying process of Fe75Nb10B15 and Fe85Nb5B10 systems has been studied from an initial mixture of elemental powders. The amorphization process is monitored by X-ray diffraction and Mössbauer spectrometry. ...
Artículo
An Equivalent Time Approach for Scaling the Mechanical Alloying Processes
(Elsevier, 2008)
Dynamics of a single ball into a planetary ball mill is analyzed leading to a cubic dependence of the power transferred during milling with the rotational speed, Ω. This leads to the definition of an equivalent time to ...
Artículo
Nanocrystallization effects on the specific heat of fe-co-nb-b amorphous alloy
(Elsevier, 2008)
Specific heat at constant pressure, CP, was measured on amorphous, nanocrystalline and fully crystalline samples of Fe60Co18Nb6B16 alloy. Magnetic and calorimetric measurements agree, describing a continuously decreasing ...
Artículo
Kinetic and Microstructural Studies on the Devitrification of Fe60-xCo18MnxNb6B16 Amorphous Alloys
(Elsevier, 2008)
Kinetic and microstructural studies have been performed on Fe60-xCo18MnxNb6B16 (x = 0, 2, 4) alloys by using different techniques. Isothermal and non-isothermal kinetics agree describing the nanocrystallization as a strongly ...