Patent ID: 8105967
Filing Date: 2012-01-31
Classification: A61L,B32B,C04B,F16C,F41H,Y10T

Abstract:
1. A composite structure comprising a reaction-bonded ceramic preform and at least two different non-ceramic infiltrants, at least one said non-ceramic infiltrant being glass, at least one said non-ceramic infiltrant being polymer, said reaction-bonded ceramic preform being characterized by porosity in the approximate range between ten percent and sixty percent of its volume, each said non-ceramic infiltrant filling at least one portion of said porosity, said at least two non-ceramic infiltrants at least substantially filling said porosity, wherein: said composite structure is characterized by plural regions; each said region corresponds to a said portion of said porosity and has a said non-ceramic infiltrant; at least a first said region has a glass said non-ceramic infiltrant and corresponds to a said portion of said porosity that is characterized by a first pore size; at least a second said region has a polymer said non-ceramic infiltrant and corresponds to a said portion of said porosity that is characterized by a second pore size that differs from said first pore size.