US4073647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cermets
Assignee: United States Department of Energy
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Filing: 1976-04-26
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Granted: 1978-02-14
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Expires: 1996-04-26
Abstract
Abstract Cermets are produced by the process of forming a physical mixture of a ceramic powder material with an elemental metal precursor compound and by decomposing the elemental metal precursor compound within the mixture. The decomposition step may be carried out either prior to or during a forming and densification step.
Inventors
- 👤 Chester S. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:06
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/20; B22F9/22; B22F9/30; G; G21; G21C; G21C7/00; G21C7/06; G21C7/24; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A cermet neutron absorber containing 2-20 volumepercent metal present as a continuous phase throughout the volume of said neutron absorber, said neutron absorber produced by the process comprising the steps of: mixing a europium sesquioxide powder and an elemental metal precursor compound to form a solid phase mixture, said elemental metal selected from the group of tantalum, rhenium, tungsten and molybdenum; decomposing said elemental metal precursor compound within said mixture so as to provide a second mixture comprising said europium sesquioxide powder and said elemental metal in an uncombined state; and densifying said second mixture to provide a cermet neutron absorber having elemental metal present as a continuous phase.
Claim 2
Dependent Claim
109 words
A cermet neutron absorber containing 2-20 volumepercent metal present as a continuous phase throughout the volume of said neutron absorber, said neutron absorber produced by the process comprising the steps of: mixing a europium sesquioxide powder and an elemental metal precursor compound to form a solid phase mixture, said elemental metal selected from the group of tantalum, rhenium, tungsten and molybdenum; decomposing said elemental metal precursor compound within said mixture so as to provide a second mixture comprising said europium sesquioxide powder and said elemental metal in an uncombined state; and densifying said second mixture to provide a cermet neutron absorber having elemental metal present as a continuous phase.
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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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |