Back to results
US 2015/0147562 A1Published application
Protective Internal Coatings for Porous Substrates
AssigneeApplied Thin Films, Inc.
InventorsSankar Sambasivan, Vikram Sharad Kaul, Francis Richard Chapman
Life of this patent
Estimating the term…
Abstract
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, drying, and curing the coating precursor to form a phosphorus-containing alumina layer within pores of the material.
Claims20
A coated material comprising:
- a porous inorganic substrate having internal pores and channels in open communication with an exterior surface, the porous inorganic substrate selected from the group consisting of a porous metal oxide on an underlying metal, a porous ceramic on an underlying metal, a porous ceramic on an underlying ceramic, a porous fiber-reinforced ceramic composite, and a porous ceramic monolith;
- and
- a coating having a thickness of 5 to 300 nm carried by the internal pores and channels of the porous inorganic substrate, the coating including two to five phospho-alumina layers, wherein each having a thickness of 1 to 50 nm.
A material comprising
- a porous inorganic substrate containing internal pores and channels in open communication with an exterior surface;
- and
- a conformal coating carried by the internal pores and channels of the porous inorganic substrate;
- the conformal coating consisting of one or more phospho-alumina layers.
1 more element
A method of conformally coating pore walls of a porous inorganic substrate comprising:
- forming a liquid film having a thickness of 5 to 250 nm on the pore walls of the porous inorganic substrate, wherein the liquid film comprises a non-colloidal solution of a phospho-alumina precursor carried in an alcohol solvent;
- drying the liquid film to yield a dried film that includes the phospho-alumina precursor;
- and then
- curing the dried film to form a conformal coating carried on the pore walls of the porous inorganic substrate, the conformal coating consisting of at least one phopho-alumina layer having a thickness of 1 to 50 nm.
1 more element
Dependencies are inferred from the claim text.