US3594895A
Expired / Lapsed
US
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Ceramic to metal seal
Assignee: ROWLAND M CANNON JR
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Filing: 1968-07-29
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Granted: 1971-07-27
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Expires: 1988-07-29
Abstract
Abstract This disclosure is directed to metal to refractory seals wherein a ductile 50 atomic percent alloy of a group IVb metal with a group VIII metal of the same period is used to braze ceramic to metal. A preferred example is sealing Tantalum or Niobium to alumina with a 50 a/o Ti-Ni alloy braze.
Inventors
- 👤 Russell J Hill
- 👤 Rowland M Cannon Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:49
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; B23K35/3046; B23K35/3053; B23K35/3093; B23K35/32; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/66; C04B2235/667; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/345; C04B2237/348; C04B2237/40; C04B2237/403; C04B2237/50; C04B2237/76; C04B2237/765; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12819; Y10T428/12861; Y10T428/12875
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A seal as in claim 1 wherein said ceramic is alumina, said metal is selected from the group consisting of Tantalum and Niobium and said 50 a/o brazing alloy is a Ti-Fe or Ti-Co alloy having a composition range of 50 a/o + or - 2 a/o.
Claim 2
Dependent Claim
55 words
A metal to ceramic seal which consists essentially of a ductile brazing alloy interposed between the metal and ceramic, said alloy consisting essentially of a single phase ductile alloy within the range of 48 a/o- 52 a/o of zirconium with a member selected from the group consisting of Ru, Rh and Pd and mixtures thereof.
Claim 3
Dependent Claim
54 words
A metal to ceramic seal which consists essentially of a ductile brazing alloy interposed between the metal and ceramic, said alloy consisting essentially of a single phase ductile alloy within the range of 48 a/o- 52 a/o of hafnium with a member selected from the group consisting of Os, Ir, Pt and mixtures thereof.
Claim 4
Independent Claim
82 words
A method of bonding a metal member and a nonmetallic refractory body which consists essentially of interposing therebetween a preform of a single phase ductile alloy within the range of 48 a/o- 52 a/o of titanium with a member selected from the group consisting of Fe and Co, and mixtures thereof, then melting only said alloy under nonoxidizing conditions, and thereafter cooling the assembly whereby said alloy forms a tight high temperature resistant bond between the metal member and the refractory body.
Claim 5
Dependent Claim
46 words
The method of claim 5 wherein said ceramic is alumina, said metal is selected from the group consisting of Tantalum and Niobium and said 50 a/o brazing alloy is a Ti-Fe or Ti-Co alloy having a composition range of 50 a/o + or - 2 a/o.
Claim 6
Independent Claim
80 words
A method of bonding metal member and a nonmetallic refractory body which consists essentially of interposing therebetween a preform of a single phase ductile alloy within the range of 48 a/o- 52 a/o of zirconium with a member selected from the group consisting of Ru, Rh, Pd and mixtures thereof, then melting only said alloy under nonoxidizing conditions, and thereafter cooling the assembly whereby said alloy forms a tight high temperature resistant bond between the metal member and refractory body.
Claim 7
Independent Claim
82 words
A method of bonding a metal member and a nonmetallic refractory body which consists essentially of interposing therebetween a preform of a single phase ductile alloy within the range of 48 a/o- 52 a/o of hafnium with a member selected from the group consisting of Os, Ir, Pt and mixtures thereof, then melting only said alloy under nonoxidizing conditions, and thereafter cooling the assembly whereby said alloy forms a tight high temperature resistant bond between the metal member and the refractory body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |