Patent US3662455A successfully refreshed from Google Patents.
US3662455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing an anti-oxidizing, active alloy brazing composition
Assignee: Lockheed Martin Corp
•
Filing: 1970-12-10
•
Granted: 1972-05-16
•
Expires: 1990-12-10
Abstract
Abstract There is herein disclosed a nickel-titanium-niobium alloy for effecting improved high temperature metal-to-ceramic and ceramicto-ceramic braze bonds which are resistant to hot alkali metal vapor and which also provide an oxidation resistant coating.
Inventors
- 👤 Glenn A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:15
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; C04B37/02; C04B37/023; C04B37/026; C22; C22C; C22C27/00; C22C27/02; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/126
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
24 words
An alloy as recited in claim 1 comprising 30 percent by weight titanium 35 percent by weight nickel, and 35 percent by weight niobium.
Claim 2
Independent Claim
103 words
The method of preparing a brazing alloy having substantial resistance to oxidation at elevated temperatures in air, which wets ceramic surfaces and which is substantially inert to alkali metal vapors at elevated temperatures, said method comprising the steps of preparing a mixture of 22.8 to 36.4 percent by weight titanium, 26.9 to 42.9 percent by weight nickel and 20.7 to 50.3 percent by weight niobium, heating said mixture in a preselected environment to a temperature greater than 1,190* Centigrade and less than 1, 220* Centigrade, maintaining said mixture at said temperature for less than 2 minutes, and cooling said mixture to ambient temperature.
Claim 3
Dependent Claim
31 words
The method recited in claim 3 wherein said mixture is prepared in the proportion of 30 percent by weight titanium, 35 percent by weight nickel, and 35 percent by weight niobium.
Claim 4
Dependent Claim
13 words
The method recited in claim 3 wherein said preselected environment is a vacuum.
Claim 5
Dependent Claim
14 words
The method recited in claim 3 wherein said preselected environment is an inert gas.
Claim 6
Dependent Claim
12 words
The method recited in claim 3 wherein said temperature is 1,200* Centigrade.
Claim 7
Dependent Claim
22 words
The method recited in claim 3 further including the step of suspending said mixture in a preselected quantity of a binding agent.
Claim 8
Dependent Claim
15 words
The method in claim 8 wherein said binding agent comprises a xylene solution of isobutyl-methacrylate.
Claim 9
Independent Claim
127 words
The method of effecting a braze bond between a metal component and a ceramic component comprising the steps of coating the surfaces of said metal and ceramic components with a brazing composition formed of 22.8 to 36.4 percent by weight titanium, 26.9 to 42.9 percent by weight nickel, and 20.7 to 50.3 percent by weight niobium, heating said ceramic component to a temperature comparable to the temperature of said coated metal component, placing said ceramic component proximate said coated metal component to form an intermediate assembly, heating said intermediate assembly to flow said brazing composition between said metal component and said ceramic component and to wet said ceramic component with said brazing composition, and cooling said assembly to solidify said brazing composition and thereby effect said bond.
Claim 10
Dependent Claim
28 words
The method recited in claim 10 further including the step of suspending said brazing composition in a preselected quantity of a binding agent prior to coating said components.
Claim 11
Dependent Claim
16 words
The method recited in claim 11 wherein said binding agent comprises a xylene solution of isobutylmethacrylate.
Claim 12
Dependent Claim
27 words
The method recited in claim 10 wherein said brazing composition comprises 30 percent by weight titanium, 35 percent by weight nickel, and 35 percent by weight niobium.
Claim 13
Dependent Claim
31 words
The method recited in claim 10 wherein said ceramic component is an aluminum oxide arc lamp envelope, and said metal component is a niobium 1 percent zirconium arc lamp end cap.
Claim 14
Dependent Claim
24 words
The method recited in claim 14 wherein all exterior surfaces of said niobium 1 percent zirconium end cap are coated with said brazing composition.
Claim 15
Dependent Claim
25 words
The method recited in claim 15 wherein said end cap surfaces are coated with said brazing composition to a thickness of at least 2.0 mils.
References Cited (Backward Citations)
US2859512A
Cited
US3594895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |