US4802933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-palladium based brazing alloys
Assignee: Honeywell International Inc
•
Filing: 1988-04-21
•
Granted: 1989-02-07
•
Expires: 2008-04-21
Abstract
Abstract A nickel-palladium-based brazing alloy is disclosed having a composition consisting essentially of about 38 to about 55 atom percent palladium, about 19 to about 34.5 atom percent iron, about 11 to about 20 atom percent silicon, the balance being essentially nickel and incidential impurities. These alloys are especially suited for use as brazing filler metals in joining stainless steels and/or superalloys at temperatures above about 1000° C. A process for brazing honeycomb structures formed at least in part from stainless steels and/or superalloys is also disclosed.
Inventors
- 👤 Anatol Rabinkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:51
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/322; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
59 words
An alloy having a composition represented by the formula: Pd.sub.a Fe.sub.b Si.sub.c Ni.sub.bal plus incidental impurities, where the subscripts "a", "b" and "c" are in atomic percent and "a" is in the range of about 38 and about 55, "b" is between about 19 and about 34.5, and "c" is in the range of about 11 to about 20.
Claim 2
Dependent Claim
59 words
An alloy having a composition represented by the formula: Pd.sub.a Fe.sub.b Si.sub.c Ni.sub.bal plus incidental impurities, where the subscripts "a", "b" and "c" are in atomic percent and "a" is in the range of about 38 and about 55, "b" is between about 19 and about 34.5, and "c" is in the range of about 11 to about 20.
Claim 3
Dependent Claim
16 words
The alloy as recited in claim 1 wherein the alloy is at least about 50% glassy.
Claim 4
Dependent Claim
26 words
The alloy of claim 1 wherein the alloy has a solidus of at least about 920° C. and a liquidus of at least about 980° C.
Claim 5
Dependent Claim
12 words
A homogeneous, ductile brazing foil formed from the alloy of claim 1.
Claim 6
Dependent Claim
50 words
The alloy recited in claim 1 wherein "a" is between about 39 and about 41, "b" is between about 27 and about 34.5, "c" is between about 11 and about 16, and nickel is between about 13 and about 26, wherein the total of a+b+c+Ni and incidental impurities is 100.
Claim 7
Dependent Claim
12 words
A homogeneous, ductile brazing foil formed from the alloy of claim 5.
Claim 8
Dependent Claim
79 words
The homogeneous, ductile brazing foil which is at least about 50% amorphous, has a liquidus temperature of at least about 980° C., and a composition represented by the formula: Pd.sub.a Fe.sub.b Si.sub.c Ni.sub.bal plus incidental impurities, where the subscripts "a", "b" and "c" are in atomic percent and "a" is in the range of about 38 and about 55, "b" is between about 19 and about 34.5, and "c" is in the range of about 11 to about 16.
Claim 9
Dependent Claim
79 words
The homogeneous, ductile brazing foil which is at least about 50% amorphous, has a liquidus temperature of at least about 980° C., and a composition represented by the formula: Pd.sub.a Fe.sub.b Si.sub.c Ni.sub.bal plus incidental impurities, where the subscripts "a", "b" and "c" are in atomic percent and "a" is in the range of about 38 and about 55, "b" is between about 19 and about 34.5, and "c" is in the range of about 11 to about 16.
Claim 10
Dependent Claim
52 words
The homogeneous, ductile brazing foil of claim 7 wherein "a" is between about 39 and about 41, "b" is between about 27 and about 34.5, "c" is between about 11 and about 16, and nickel is between about 13 and about 26, wherein the total of a+b+c+Ni and incidental impurities is 100.
Claim 11
Dependent Claim
17 words
The homogeneous, ductile brazing foil of claim 7 wherein said foil is at least about 90% glassy.
References Cited (Backward Citations)
CA666093A
Cited
GB1207751A
Cited
US4149881A
Cited
US4405391A
Cited
US4508257A
Cited
JPS5932A
Cited
US4746379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |