Abstract:
The present invention is directed to compositions derived from polymers containing metal-nitrogen bonds, which compositions exhibit, among other things, desirable oxidation resistance, corrosion resistance and hydrolytic stability when exposed to adverse environments, whether at ambient or at elevated temperatures, and which may be useful as, for example, protective coatings on surfaces.
Abstract:
The present invention relates to a novel process for forming metal matrix composite bodies. Particularly, an infiltration enhancer and/or an infiltration enhancer precursor and/or an infiltrating atmosphere are in communication with a filler material or a preform, at least at some point during the process, which permits molten matrix metal to spontaneously infiltrate the filler material or preform. Such spontaneous infiltration occurs without the requirement for the application of any pressure or vacuum. The molten matrix metal is provided in a unique manner which enhances the spontaneous infiltration process.
Abstract:
The present invention relates to a novel process for forming macrocomposite bodies by infiltrating a permeable mass of filler material or a preform to form a metal matrix composite body and, by an appropriate means, bonding said formed metal matrix composite body to another body. Particularly, in a preferred embodiment, spontaneous infiltration occurs by use of an infiltration enhancer and/or an infiltration enhancer precursor and/or an infiltrating atmosphere which are in communication with a filler material or a preform, at least at some point during the process, thereby permitting molten matrix metal to spontaneously infiltrate the filler material or preform. Such spontaneous infiltration occurs without the requirement for the application of any pressure or vacuum.
Abstract:
Nouveau procédé servant à former des composites à matrice métallique utilisant un matériau de barrage. Plus particulièrement, un renforçateur d'infiltration et/ou un précurseur de renforçateur d'infiltration et/ou une atmosphère d'infiltration sont en communication avec une matière de remplissage ou une préforme, au moins à un certain stade durant le procédé, ce qui permet au métal matriciel en fusion de s'infiltrer spontanément dans la matière de remplissage ou la préforme jusqu'au matériau de barrage. Une telle infiltration spontanée se produit sans que l'application d'une pression ou d'une dépression soit nécessaire. C'est ainsi que des composites moulés à matrice métallique peuvent être produits avec un fini de surface supérieur.
Abstract:
The present invention relates to a novel process for forming metal matrix composite bodies by using a barrier material. Particularly, an infiltration enhancer and/or an infiltration enhancer precursor and/or an infiltrating atmosphere are in communication with a filler material or a preform, at least at some point during the process, which permits molten matrix metal to spontaneously infiltrate the filler material or preform up to the barrier material. Such spontaneous infiltration occurs without the requirement for the application of any pressure or vaccum. Accordingly, shaped metal matrix composite bodies can be produced having superior surface finish.
Abstract:
The present invention relates to a novel process for forming metal matrix composite bodies. Particularly, an infiltration enhancer and/or an infiltration enhancer precursor and/or an infiltrating atmosphere are in communication with a filler material or a preform, at least at some point during the process, which permits molten matrix metal to spontaneously infiltrate the filler material or preform. Such spontaneous infiltration occurs without the requirement for the application of any pressure or vacuum. The molten matrix metal is provided in a unique manner which enhances the spontaneous infiltration process.
Abstract:
The present invention is directed to compositions derived from polymers containing metal-nitrogen bonds, which compositions exhibit, among other things, desirable oxidation resistance, corrosion resistance and hydrolytic stability when exposed to adverse environments, whether at ambient or at elevated temperatures, and which may be useful as, for example, protective coatings on surfaces.
Abstract:
Nouveau procédé de formation de corps macrocomposites par infiltration d'une masse perméable de matières de remplissage ou d'une préforme afin de former un corps composite matriciel en métal et, à l'aide d'un moyen approprié, par liaison dudit corps composite matriciel en métal formé à un autre corps. Dans un mode de réalisation préféré, notamment, une infiltration spontanée a lieu à l'aide d'un activateur d'infiltration et/ou d'un précurseur d'activateur d'infiltration et/ou d'une atmosphère d'infiltration lesquels sont en communication avec une matière de remplissage ou une préforme, au moins à un momnet donné pendant le processus, permettant ainsi à du métal matriciel fondu de s'infiltrer spontanément dns la matière de remplissage ou dans la préforme. Ladite infiltration spontanée a lieu sans application de pression ou de vide.