SINTER BONDED POROUS METALLIC COATINGS

PROBLEM TO BE SOLVED: To provide a method for depositing a thin nano powder layer on a substrate.SOLUTION: A method for forming a porous coating with nanosize pores on a substrate includes the steps of: (a) forming a suspension (10) of sinterable particles in a carrier fluid; (b) maintaining the sus...

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Hauptverfasser:	WAYNE F WHITE, KENNETH L RUBOW, STEELE JAMES K, ALFRED M ROMANO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS ARTIFICIAL STONE CASTING CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE FERROUS OR NON-FERROUS ALLOYS LIME, MAGNESIA MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POWDER METALLURGY REFRACTORIES SEPARATION SLAG TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF NATURAL STONE WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for depositing a thin nano powder layer on a substrate.SOLUTION: A method for forming a porous coating with nanosize pores on a substrate includes the steps of: (a) forming a suspension (10) of sinterable particles in a carrier fluid; (b) maintaining the suspension by agitating (12) the carrier fluid; (c) applying (16) a first coating of the suspension to the substrate; and (d) sintering (36) the sinterable particles to the substrate. A thin layer of this nanoporous coating is deposited (16) onto a substrate having micropores. The substrate provides strength and structural support while the properties of the nano powder layer controls flow and filtration aspects of the device. This composite has sufficient strength for handling and use in industrial processes. Since the nano powder layer is thin, the pressure drop across the layer is substantially less than conventional thicker nano powder structures.