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handle: 10261/34207
[EN] The invention relates to biocompatible, non-ferromagnetic, iron-based, intermetallic alloys which are intended for biomedical applications. More specifically, the invention relates to a series of oxide-dispersion-hardened FeAlCr intermetallic alloys, referred to herein as ALUSI, which are suitable for use as biomaterial. The inventive alloys contain neither Ni, an allergenic element, nor Co, a geostrategic element (more expensive). The medical implants and devices produced from said alloys have high mechanical strength, good corrosion resistance, excellent in vitro biocompatibility in relation to biomaterials currently in use and the ability to be hardened with a layer of alumina by means of thermal oxidation. The alloy-production method requires the use of a powder metallurgy route comprising the mechanical alloying of powders of the alloy-forming elements and the subsequent consolidation of said mechanically-alloyed powders.
[ES] Esta invención se corresponde con una serie de aleaciones FeAICr intermétalicas endurecidas por dispersión de óxidos, que denominaremos aleaciones ALUSI, adecuadas para su uso como biomaterial. Merece la pena señalar la ausencia de Ni, un elemento alergénico, y Co, un elemento geoestratégico (más caro). Los implantes o dispositivos médicos fabricados con estas aleaciones tendrían una resistencia mecánica elevada, buena resistencia a la corrosión, excelente biocompatibilidad in vitro en relación con biomateriales en uso, y la capacidad de ser endurecidas con una capa de alúmina mediante oxidación térmica. Para fabricar la aleación, es necesario utilizar una ruta pulvimetalúrgica consistente en aleado mecánico de polvos de los elementos que formarán la aleación y posterior consolidación de los polvos aleados mecánicamente.
Fecha de presentación internacional: 02.07.2004. - Titulares: Consejo Superior de Investigaciones Científicas (CSIC). - Asociación Inst. Biomécanica de Valencia. - The European Community. - Istitute Ortopedici Rizzoli. - Surgival, CO S.A. - Plansee GmbH
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