US4698271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-silver-titanium filler metal for direct brazing of structural ceramics
Assignee: United States, ENERGY THE, Department of
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Filing: 1985-12-30
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Granted: 1987-10-06
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Expires: 2005-12-30
Abstract
Abstract A method of joining ceramics and metals to themselves and to one another is described using a brazing filler metal consisting essentially of 35 to 50 atomic percent copper, 15 to 50 atomic percent silver and 10 to 45 atomic percent titanium. This method produces strong joints that can withstand high service temperatures and oxidizing environments.
Inventors
- 👤 Arthur J. Moorhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:38
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3006; B23K35/302; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/124; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/345; C04B2237/348; C04B2237/38; C04B2237/40; C04B2237/405; C04B2237/406; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A method of joining components made of ceramics or metals comprising assembling surfaces of components to be joined in an abutting relationship with a brazing filler metal disposed thereinbetween, said brazing filler metal consisting of 35 to 50 atomic percent copper, 15 to 50 atomic percent silver and 10 to 45 atomic percent titanium, heating the resulting assembly to a brazing temperature the range of 900° C. to 1000° C. under nonoxidizing conditions and cooling the resulting braze joint.
Claim 2
Independent Claim
79 words
A method of joining components made of ceramics or metals comprising assembling surfaces of components to be joined in an abutting relationship with a brazing filler metal disposed thereinbetween, said brazing filler metal consisting of 35 to 50 atomic percent copper, 15 to 50 atomic percent silver and 10 to 45 atomic percent titanium, heating the resulting assembly to a brazing temperature the range of 900° C. to 1000° C. under nonoxidizing conditions and cooling the resulting braze joint.
Claim 3
Dependent Claim
41 words
A composite body comprising at least two structural components of ceramics or metals joined with brazing filler metal disposed thereinbetween consisting of 35 to 50 atomic percent copper, 15 to 50 atomic percent silver and 10 to 45 atomic percent titanium.
Claim 4
Dependent Claim
41 words
A composite body comprising at least two structural components of ceramics or metals joined with brazing filler metal disposed thereinbetween consisting of 35 to 50 atomic percent copper, 15 to 50 atomic percent silver and 10 to 45 atomic percent titanium.
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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) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |