Patent EP0261059A2 successfully refreshed from Google Patents.
EP0261059A2
Expired / Lapsed
EP
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Surface bonding of ceramic bodies
Assignee: Lanxide Technology Co LP
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Filing: 1987-09-03
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Granted: —
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Expires: 2007-09-03
Abstract
Abstract Ceramic bodies (2,4) are bonded together via a layer of an oxidation reaction product of a molten metal, which metal is present in one or both of the ceramic bodies (2,4) prior to bonding. At least one of the ceramic bodies (2,4) comprises a ceramic product formed by the oxidation reaction of molten parent metal (e.g., alumina from molten aluminum) and grown as molten metal is transported through, and oxidized on the surface of, its own oxidation product. One or both of the ceramic bodies (2,4) used in the bonding process contains surface-accessible channels of residual metal, i.e., metal channels which have resulted from molten-metal transport during the ceramic growth process. When the suitably assembled ceramic bodies (2,4) are heated in an oxidizing atmosphere at a temperature above the melting point of the residual metal, molten metal at the surface of the ceramic body reacts with the atmospheric oxidant so as to bond the facing surfaces together by a layer of the oxidation reaction product of the molten metal formed therebetween.
Inventors
- 👤 Stanley J. Luszcz
- 👤 Andrew W. Urquhart
- 👤 Marc S. Newkirk
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:18
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/001; C04B35/00; C04B35/622; C04B35/64; C04B35/65; C04B35/652; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/064; C04B2237/068; C04B2237/08; C04B2237/083; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/36; C04B2237/40; C04B2237/401; C04B2237/50; C04B2237/54; C04B2237/55; C04B2237/555; C04B2237/61; C04B2237/70; C04B2237/704; C04B2237/708; Y; Y10; Y10S; Y10S264/00; Y10S264/76
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
160 words
A method of bonding ceramic bodies along substantially congruent surfaces, comprising: (a) providing a first body of ceramic, said first body comprising a ceramic product formed by the oxidation reaction of molten parent metal and a vapor-phase oxidant and grown as molten metal is transported through, and oxidized on, the surface of its own oxidation reaction product, said ceramic body comprising a polycrystalline oxidation reaction product and interconnected residual metal; (b) assembling said first body of ceramic adjacent a second body of ceramic in a manner such that a pair of surfaces of said first and second bodies to be bonded together face one another; and (c) heating the assembled ceramic bodies in the presence of a vapor-phase oxidant at a temperature above the melting point of the said residual metal to induce transport of said residual metal toward the bonding surfaces where oxidation reaction product continues to grow as in step (a) thereby effecting a bond between said bodies
Claim 2
Independent Claim
160 words
A method of bonding ceramic bodies along substantially congruent surfaces, comprising: (a) providing a first body of ceramic, said first body comprising a ceramic product formed by the oxidation reaction of molten parent metal and a vapor-phase oxidant and grown as molten metal is transported through, and oxidized on, the surface of its own oxidation reaction product, said ceramic body comprising a polycrystalline oxidation reaction product and interconnected residual metal; (b) assembling said first body of ceramic adjacent a second body of ceramic in a manner such that a pair of surfaces of said first and second bodies to be bonded together face one another; and (c) heating the assembled ceramic bodies in the presence of a vapor-phase oxidant at a temperature above the melting point of the said residual metal to induce transport of said residual metal toward the bonding surfaces where oxidation reaction product continues to grow as in step (a) thereby effecting a bond between said bodies
Claim 3
Dependent Claim
30 words
A method of Claim 1 wherein the parent metal is an aluminum parent metal, the oxidant is air, the oxidation reaction product is alumina, and the residual metal comprises aluminum.
Claim 4
Dependent Claim
27 words
A method of Claim 1 or Claim 2 wherein said first body of ceramic comprises a composite formed by infiltrating a filler with said oxidation reaction product.
Claim 5
Dependent Claim
19 words
A method of Claim 1 or Claim 2 wherein a dopant is used in conjunction with said parent metal.
Claim 6
Dependent Claim
16 words
A method of Claim 1 wherein said first and second bodies are assembled in intimate contact.
Claim 7
Dependent Claim
24 words
A method of Claim 1 wherein said first and second bodies are assembled with their bonding surfaces at a small angle to one another.
Claim 8
Dependent Claim
37 words
A method of Claim 1 wherein a barrier means is applied to all exposed surfaces of said first body of ceramic except the surface thereof to be bonded to a surface of said second body of ceramic.
Claim 9
Dependent Claim
26 words
A method of Claim 7 wherein said barrier is selected from the group consisting of calcium sulfate, calcium silicate, portland cement, tricalcium phosphate, and mixtures thereof.
Claim 10
Dependent Claim
76 words
A method of Claim 1 wherein a body of parent metal is positioned adjacent a free surface of said first body of ceramic and a barrier means is applied to part or all of the remaining exposed surfaces of said body of parent metal and said first body of ceramic, whereby said body of parent metal melts during the heating step and molten metal is transported into said first body of ceramic toward said bonding surfaces.
Claim 11
Dependent Claim
22 words
A method of Claim 1 wherein said second body of ceramic is substantially the same composition as said first body of ceramic.
Claim 12
Dependent Claim
25 words
A method of Claim 1 wherein said second body of ceramic is made by a method other than the oxidation of a molten parent metal.
Claim 13
Dependent Claim
33 words
A method of Claim 1 wherein said second body of ceramic is made by the oxidation of a molten parent metal but is of a different composition than said first body of ceramic.
Claim 14
Dependent Claim
18 words
A method of Claim 1 wherein said oxidation reaction product is an oxide, a nitride, or a carbide.
Claim 15
Dependent Claim
22 words
A method of Claim 1 wherein said parent metal is selected from the group consisting of titanium, silicon, zirconium, hafnium, or tin.
References Cited (Backward Citations)
No citation records indexed.
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