PROTECTIVE INTERNAL COATINGS FOR POROUS SUBSTRATES

摘要

A material contains open pores in which the channels and pores that are internally coated with at least one layer of phosphorus-containing alumina. Such material is formed by infiltrating a porous material one or more times with a non-colloidal, low-viscosity liquid coating precursor under a pressure differential, drying, and curing the coating precursor to form a phosphorus-containing alumina layer within pores of the material.