US4907948A
Expired / Lapsed
US
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Non-evaporable ternary gettering alloy, particularly for the sorption of water and water vapor in nuclear reactor fuel elements
Assignee: SAES Getters SpA
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Filing: 1982-05-20
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Granted: 1990-03-13
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Expires: 2002-05-20
Abstract
Abstract The scope of the present invention is the provision of a non-evaporable gettering ternary alloy particularly for the sorption of water and water vapor in nuclear reactor fuel elements. The ternary gettering alloy has a composition which when plotted on a ternary composition diagram in weight percent Zr, weight percent Ti and weight percent Fe lies within a polygon having as its corners the points defined by (a) 75% Zr--5% Ti--20% Fe (b) 60% Zr--5% Ti--35% Fe (c) 45% Zr--20% Ti--35% Fe (d) 75% Zr--20% Ti--5% Fe
Inventors
- 👤 Aldo Barosi
- 👤 Claudio Boffito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:54
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/16; G21C3/17; C; C01; C01B; C01B3/00; C01B3/0005; C01B3/001; C01B3/0018; C01B3/0031; C22; C22C; C22C16/00; C22C30/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02E60/00; Y02E60/30; Y02E60/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
25 words
Method for the stoichiometric sorption of both oxygen and hydrogen from water which consists of contacting water with a non-evaporable ternary gettering alloy of Zr--Ti--Fe.
Claim 2
Dependent Claim
25 words
Method for the stoichiometric sorption of both oxygen and hydrogen from water which consists of contacting water with a non-evaporable ternary gettering alloy of Zr--Ti--Fe.
Claim 3
Dependent Claim
34 words
Method according to claim 1, in which the ternary alloy used comprises: from 45 to 75% by weight Zr from 5 to 20% by weight Ti and from 5 to 35% by weight Fe.
Claim 4
Dependent Claim
71 words
A method according to claim 1 in which the ternary gettering alloy comprising Zr, Ti and Fe having a composition which when plotted on a ternary composition diagram in weight percent Zr, weight percent Ti and weight percent Fe lies within a polygon having as its corners the points defined by: (a) 75% Zr--5% Ti--20% Fe (b) 60% Zr--5% Ti--35% Fe (c) 45% Zr--20% Ti--35% Fe (d) 75% Zr--20% Ti--5% Fe
Claim 5
Dependent Claim
56 words
Method according to claim 1, in which the water pressure is less than 100 Torr, the gettering alloy has a temperature between 200° C. and 350° C. and is able to sorb up to 4% by weight of water, and in which the particles of the gettering alloy have a particle size between 25μ and 125μ.
Claim 6
Dependent Claim
16 words
Method according to claim 1 in which water is present in the form of water vapour.
Claim 7
Dependent Claim
16 words
Method according to claim 5 in which the water vapour is mixed with a rare gas.
Claim 8
Dependent Claim
130 words
Method for the stoichiometric sorption of both oxygen and hydrogen from water which consists of contacting water with a non-evaporable ternary gettering alloy comprising Zr, Ti, and Fe having a composition which when plotted on a ternary composition diagram in weight percent Zr, weight percent Ti and weight percent Fe lies within a polygon having as its corners the points defined by: (a) 75% Zr--5% Ti--20% Fe (b) 60% Zr--5% Ti--35% Fe (c) 45% Zr--20% Ti--35% Fe (d) 75% Zr--20% Ti--5% Fe; wherein, the water pressure is less than 100 Torr; wherein, the gettering alloy has a temperature between 200° C. and 350° C. and is able to sorb up to 4% by weight of water; and wherein particles of the gettering alloy have a particle size between 25μand 125μ.
Claim 9
Dependent Claim
130 words
Method for the stoichiometric sorption of both oxygen and hydrogen from water which consists of contacting water with a non-evaporable ternary gettering alloy comprising Zr, Ti, and Fe having a composition which when plotted on a ternary composition diagram in weight percent Zr, weight percent Ti and weight percent Fe lies within a polygon having as its corners the points defined by: (a) 75% Zr--5% Ti--20% Fe (b) 60% Zr--5% Ti--35% Fe (c) 45% Zr--20% Ti--35% Fe (d) 75% Zr--20% Ti--5% Fe; wherein, the water pressure is less than 100 Torr; wherein, the gettering alloy has a temperature between 200° C. and 350° C. and is able to sorb up to 4% by weight of water; and wherein particles of the gettering alloy have a particle size between 25μand 125μ.
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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) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |