Process for producing a porous ceramic and porous ceramic composite structure utilizing combustion synthesis
AssigneeUniversity of Cincinnati
InventorsJainagesh A. Sekhar, Sarit B. Bhaduri
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Abstract
A process for producing a porous ceramic, ceramic composite or metal-ceramic composite structure by combustion synthesis wherein a foamed polymer shape is impregnated with a slurry of ceramic precursors and ignited to initiate combustion synthesis, thereby obtaining a ceramic, ceramic composite or metal-ceramic composite article having interconnected porosity. Ceramic composite filters having improved strength, toughness and thermal shock resistance are provided, with the ceramic composite being an oxide and a nonoxide.
Claims19
A process for producing a porous ceramic or ceramic composite structure, which comprises providing a slurry of particulate ceramic precursors capable of undergoing combustion synthesis, impregnating a foamed polymer shape with said slurry, heating the slurry-impregnated polymer shape to a temperature sufficient to remove said polymer, and igniting said ceramic precursors to initiate combustion synthesis, thereby obtaining a ceramic or ceramic composite structure having interconnected porosity and controlled pore size.
A process for producing a porous metal-ceramic composite structure, which comprises providing a slurry of particulate ceramic and metal precursors capable of undergoing combustion synthesis, impregnating a foamed polymer shape with said slurry, heating the slurry-impregnated polymer shape to a temperature sufficient to remove said polymer, and igniting said ceramic and metal precursors to initiate combustion synthesis, thereby obtaining a metal-ceramic composite structure having interconnected porosity and controlled pore size.
Dependencies are inferred from the claim text.