TERNERO FERNÁNDEZ , Fátima

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Se ha aplicado un método novedoso para aumentar la dureza de una aleación de aluminio y titanio partiendo de polvo amorfo obtenido mediante molienda mecánica de alta energía y posterior consolidación mediante sinterización por resistencia eléctrica. Los polvos amorfos de TiAl, fabricados mediante molienda mecánica durante 75 horas, mostraron...

A type of disc-on-plate test methodology was used to determine the wear behavior of metallic binders employed in the manufacturing of diamond impregnated tools. The disc consists of a special circular wheel that allows the binder materials alone (i.e., without diamond, but sintered under conditions identical to those of the complete tool) to be...

The nanocrystallisation behaviour and subsequent intermetallics formation of an amorphous Al88-Y4-Ni8 alloy has been studied. A 1 at% of Al or Ni was also substituted by Cu and its effect studied. Differential scanning calorimetry has been used to measure the thermal stability of these amorphous alloys. Transmission electron microscopy...

In this work, the obtaining of amorphized ferromagnetic particles by mechanical milling has been studied. For this purpose, the compositions Fe₇₈Si₂₂ and Fe₇₈Si₉B₁₃ have been studied and the results have been compared in order to determine the best characteristics achieved with this technique. The behavior has been studied when other elements...

In this work, the obtaining of amorphized ferromagnetic particles by mechanical milling has been studied. For this purpose, the compositions Fe₇₈Si₂₂ and Fe₇₈Si₉9B₁₃ have been studied and the results have been compared in order to determine the best characteristics achieved with this technique. The behavior has been studied when other elements...

La presente patente tiene por objeto presentar un nuevo método para la fabricación pulvimetalúrgica de imanes (aplicable especialmente a la fabricación de imanes que contienen tierras raras). Lo novedoso del método reside en el empleo de alguna modalidad

Se ha fabricado polvo amorfo de la aleación Al75Fe25 a partir del polvo elemental cristalino de aluminio puro y hierro puro. El proceso de fabricación del polvo amorfo se ha llevado a cabo mediante molienda mecánica con una duración de hasta 100 horas. El objetivo de este trabajo consiste en determinar la evolución de la compresibilidad y de la...

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The present work aims to produce TixCu100-x (x = 90, 80, 70, and 60) amorphous alloys by using high energy ball mill. The microstructure and possible formation of amorphous phases were characterized employing laser granulometry, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The...

Capacitor electrical discharge consolidation (CEDC) is a technique that uses the heat of the Joule effect of a high intensity electric current to consolidate powders. In this study, the effect of the precompaction pressure and the number of discharges on the porosity, microstructure and hardness of the compacts is analysed. Furthermore, the...

Ti-Cu alloys are used in dental and medical applications, due to their good mechanical properties, corrosion resistance and antibacterial properties. These properties are sensitive to microstructure and can be improved by formation of intermetallic compounds or amorphization of crystalline Ti-Cu powder. This study focuses on the amorphization...

This research focused on studying the effect of temperature on the mechanical properties of aluminium matrix composites (AMCs) obtained by a powder metallurgy route. Aluminium powder was milled at room temperature for 5 h and using di erent atmospheres in order to achieve di erent amounts of reinforcement. The atmospheres employed were vacuum,...