Patent US3801309A successfully refreshed from Google Patents.
US3801309A
Expired / Lapsed
US
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Production of eutectic bodies by unidirectional solidification
Assignee: Saint Gobain Ceramics and Plastics Inc
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Filing: 1971-11-08
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Granted: 1974-04-02
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Expires: 1991-11-08
Abstract
Abstract Eutectic bodies with controlled morphology are produced by establishing a thin liquid film of a eutectic composition on a hot supporting surface, growing a body of said composition from said film by unidirectional solidification, pulling the body away from the film at a rate consistent with the rate of solidification, and replenishing the film so as to sustain continuous growth.
Inventors
- 👤 A Mlavsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:03
CPC Classifications
C; C30; C30B; C30B21/00; C30B21/06; C30B15/00; C30B15/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
13 words
Method according to claim 1 wherein said eutectic composition is a binary composition.
Claim 2
Dependent Claim
12 words
Method according to claim 1 wherein said eutectic composition is an alloy.
Claim 3
Dependent Claim
13 words
Method according to claim 3 wherein said alloy essentially comprises nickel and aluminum.
Claim 4
Dependent Claim
14 words
Method according to claim 4 wherein said alloy essentially comprises nickel, indium and antimony.
Claim 5
Dependent Claim
21 words
Method according to claim 1 wherein said mass is turned about its pulling axis as it is pulled from said film.
Claim 6
Dependent Claim
12 words
Method according to claim 1 wherein said flat supporting surface is porous.
Claim 7
Dependent Claim
39 words
Method according to claim 7 wherein said porous surface is part of a member consisting of a myriad of interconnected open cells, and further wherein said additional quantity of said mixture is supplied to said surface via said cells.
Claim 8
Dependent Claim
125 words
Method of producing a polyphase eutectic body having a coherent microstructure comprising: establishing a thin liquid film of a selected eutecticcomposition on a substantially horizontAl and planar end surface of a heat conducting member, and controlling the temperature of said film so that it has (1) a sharp vertical temperature gradient, (2) a substantially flat horizontal temperature profile, and (3) an average temperature approximately equal to the eutectic point temperature of said composition; growing and vertically withdrawing a coherent polyphase solid body from said film at a selected rate; and supplying additional quantities of said composition in liquid form to said end surface via a passageway in said member as said solid body is being grown to replace the liquid consumed in producing said body.
Claim 9
Dependent Claim
22 words
Method according to claim 9 wherein the thickness of said film is held substantially constant during growth and withdrawal of said body.
Claim 10
Dependent Claim
18 words
Method according to claim 9 wherein growth of said body is initiated by use of a crystalline seed.
Claim 11
Dependent Claim
20 words
Method according to claim 9 further including the step of rotating said body as it is withdrawn from said film.
Claim 12
Dependent Claim
34 words
Method according to claim 9 wherein said member is supported in a heated crucible containing a reservoir supply of said selected composition in liquid form, and said film is replenished from said reservoir supply.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |