Patent US5139979A successfully refreshed from Google Patents.
US5139979A
Expired / Lapsed
US
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Method of producing self-supporting aluminum titanate composites and products relating thereto
Assignee: Lanxide Technology Co LP
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Filing: 1991-05-06
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Granted: 1992-08-18
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Expires: 2011-05-06
Abstract
Abstract The present invention relates, generally, to a self-supporting porous ceramic composite body and to methods for producing such articles to net or near net shape, which bodies exhibit superior thermal and mechanical properties. The invention also relates to the manufacture of ceramic-metal composite bodies which have ceramic articles incorporated therein.
Inventors
- 👤 Edward M. Anderson
- 👤 Thomas A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:06
CPC Classifications
C; C23; C23C; C23C30/00; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/478; C04B35/622; C04B35/62222; C04B35/64; C04B35/65; C04B35/652; C04B2111/00; C04B2111/00241; C04B2111/00405
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
71 words
A method for producing a thermal shock resistant, thermally insulating and compliant article comprising: (a) mixing a powder comprising a parent metal with at least one material selected from the group consisting of aluminum titanate and aluminum titanate precurors; (b) adding a stabilization aid material; (c) forming a green body from the mixture of step (b); and (d) oxidizing and sintering said green body to form an article comprising aluminum titanate.
Claim 2
Independent Claim
71 words
A method for producing a thermal shock resistant, thermally insulating and compliant article comprising: (a) mixing a powder comprising a parent metal with at least one material selected from the group consisting of aluminum titanate and aluminum titanate precurors; (b) adding a stabilization aid material; (c) forming a green body from the mixture of step (b); and (d) oxidizing and sintering said green body to form an article comprising aluminum titanate.
Claim 3
Dependent Claim
12 words
A method according to claim 1, wherein said parent metal comprises aluminum.
Claim 4
Dependent Claim
34 words
A method according to claim 1, wherein the stabilization aid comprises at least one material selected from the group consisting of chrome ore, ilmenite, SiO 2 , MgO and Fe 2 O 3 .
Claim 5
Dependent Claim
31 words
A method according to claim 1, further comprising forming said green body by a method selected from the group consisting of hot pressing, slip casting, injection molding, sediment casting, and extrusion.
Claim 6
Dependent Claim
27 words
A method according to claim 4, wherein said method comprises slip casting and further comprises controlling the pH of the slip during ball milling of the slip.
Claim 7
Dependent Claim
25 words
A method according to claim 1, further comprising sintering said green body at a temperature of from about 1300° C. through at least 1500° C.
Claim 8
Dependent Claim
38 words
A method according to claim 6, wherein said oxidizing is continued for a time sufficient to form at least some oxidation reaction product from said parent metal such that said parent metal provides porosity in the sintered body.
Claim 9
Dependent Claim
38 words
A method according to claim 1, wherein said aluminum titanate precursors comprise at least one material selected from the group consisting of Al 2 O 3 , TiO 2 , Al, Ti and alloys of Al and Ti.
Claim 10
Dependent Claim
31 words
A method according to claim 7, wherein said parent metal comprises an aluminum alloy comprising at least one material selected from the group consisting of Zn, Cu, Si, Fe and Mg.
Claim 11
Dependent Claim
19 words
A method according to claim 1, further comprising casting a molten metal around of said sintered article aluminum titanate.
Claim 12
Dependent Claim
26 words
A method according to claim 10, wherein said molten metal comprises at least one material selected from the group consisting of aluminum, iron and alloys thereof.
Claim 13
Dependent Claim
10 words
A product produced according to the method of claim 1.
Claim 14
Dependent Claim
10 words
A product produced according to the method of claim 11.
Claim 15
Dependent Claim
26 words
The method according to claim 1, wherein said parent metal comprises at least one metal selected from the group consisting of aluminum, titanium, zirconium and tin.
Claim 16
Dependent Claim
23 words
The method according to claim 1, wherein said parent metal comprises from about 5 to about 35 weight percent of said green body.
Claim 17
Dependent Claim
23 words
The method according to claim 3, wherein said stabilizers comprises from about 5 to about 20 percent by weight of said green body.
Claim 18
Dependent Claim
37 words
The method according to claim 1, wherein said at least one material provides a sufficient quantity of material to result in about 50 to about 95 percent by weight Al 2 TiO 5 in the formed body.
Claim 19
Independent Claim
178 words
A method for producing a porous ceramic composite which is to be at least partially surrounded by a cast metal, said method comprising: (a) providing a powder comprising at least one parent metal selected from the group consisting of aluminum, titanium, and alloys thereof mixed with at least one material comprising a material selected from the group consisting of Al 2 TiO 5 , Al 2 O 3 , and TiO 2 ; (b) adding at least one material comprising a material selected from the group consisting of chrome ore, ilmenite, SiO 2 and MgO and Fe 2 O 3 ; (c) forming a green body using a method selected from the group consisting of hot pressing, slip casting, injection molding, dry pressing, sediment casting and extrusion; and (d) oxidizing and sintering said green body in air at a temperature of at least 1300° C. for at least a time sufficient to form at least some oxidation reaction product from said parent metal in order to induce porosity and to provide integrity; thereby forming said porous ceramic composite.
Claim 20
Independent Claim
178 words
A method for producing a porous ceramic composite which is to be at least partially surrounded by a cast metal, said method comprising: (a) providing a powder comprising at least one parent metal selected from the group consisting of aluminum, titanium, and alloys thereof mixed with at least one material comprising a material selected from the group consisting of Al 2 TiO 5 , Al 2 O 3 , and TiO 2 ; (b) adding at least one material comprising a material selected from the group consisting of chrome ore, ilmenite, SiO 2 and MgO and Fe 2 O 3 ; (c) forming a green body using a method selected from the group consisting of hot pressing, slip casting, injection molding, dry pressing, sediment casting and extrusion; and (d) oxidizing and sintering said green body in air at a temperature of at least 1300° C. for at least a time sufficient to form at least some oxidation reaction product from said parent metal in order to induce porosity and to provide integrity; thereby forming said porous ceramic composite.
Claim 21
Dependent Claim
20 words
The method according to claim 18, wherein said porous ceramic composite comprises from about 10 to about 50 percent porosity.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |