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US 2016/0185935 A1Published application
Process and Formulation to Join Ceramic Forms While Maintaining Structural and Physical Characteristics Across The Bond Surface
AssigneeThe Boeing Company
InventorsTab H. Crooks, MaryAnn S. Muench
Life of this patent
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Abstract
A ceramic bonding material including at least one fibrous material, a flux agent and a thickening agent wherein the ceramic bonding material fired at a set temperature to bond the two adjacent substrate faces.
Claims36
A bonding material comprising:
- a fibrous material,
- a fluxing agent;
- and
- a thickening agent wherein the fibrous material has a CTE that is substantially similar to the CTE of at least one substrate component that is bonded by the bonding material.
1 more element
A bonding material comprising an aqueous admixture of:
- from about 50 wt % to about 90 wt % of chopped aluminum borosilicate fibers having an average length of from about 1/16th of an inch of about ½ of an inch;
- from less than about 0.01 wt % to about 5 wt % of lithium metaborate;
- and
- from greater than about 0 wt % to about 10 wt % methylcellulose wherein the aluminum borosilicate has a CTE that is substantially similar to the CTE of at least one substrate that is bonded by the bonding material.
1 more element
A composite structure comprising;
- a first substrate having a bonding surface, a second substrate having a bonding surface the first and second substrates have different coefficients of thermal expansion (CTEs);
- a bonding material located between the first substrate bonding surface and the second substrate bonding surface, the bonding material bonding the first substrate to the second substrate, the bonding material comprising a cured admixture of a fibrous material, a fluxing agent;
- and a thickening agent wherein the fibrous material has a CTE that lies between the CTE of the first substrate and the CTE of the second substrate.
A composite structure comprising;
- a first ceramic foam substrate having a bonding surface, a second ceramic foam substrate having a bonding surface the first and second substrates having substantially the same CTE;
- a bonding material located between the first substrate bonding surface and the second substrate bonding surface, the bonding material bonding the first substrate to the second substrate, the bonding material comprising an cured admixture of a fibrous material, a fluxing agent;
- and a thickening agent wherein the fibrous material has a CTE that is substantially similar to the CTE of the first and second ceramic foam substrates.
A method for forming a cured ceramic structure comprising the steps of:
- (a) applying a bonding material to at least one bonding surface selected from a first bonding surface of a first substrate piece and a second bonding surface of a second substrate piece wherein the bonding material further comprises a fibrous material, a fluxing agent and a thickening agent wherein the fibrous material has a CTE that is substantially similar to the CTE of at least one of the first and second substrates;
- (b) joining the first bonding surface and the second bonding surface such that the bonding material is positioned between the first bonding surface and the second bonding surface to form a ceramic structure including an uncured bonding material;
- and
- (c) heating the ceramic structure at a temperature of from about 1,000° C. to about 1,600° C. for a time sufficient to form a ceramic structure including a cured bonding material.
1 more element
Dependencies are inferred from the claim text.