US3813759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of brazing
Assignee: Tenmat Ltd
•
Filing: 1971-09-09
•
Granted: 1974-06-04
•
Expires: 1991-09-09
Abstract
Abstract A method of brazing together bodies composed either of dense self-bonded silicon carbide containing free silicon or dense carbon using a brazing material consisting of an alloy of silicon with one or more metals, in particular germanium, iron, gold, nickel, palladium, platinum, chromium, titanium, which alloy contains at least 5 atomic per cent of silicon, has a melting temperature not higher than 1400*C, has thermal expansion characteristics matching those of the bodies to be brazed together, and in the molten state is capable of wetting the surfaces of the bodies. The method is especially suitable for bracing silicon carbide caps to silicon carbide nuclear fuel element containers.
Inventors
- 👤 H Heap
- 👤 C Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:32
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; G21C3/10; B; B23; B23K; B23K1/00; B23K1/19; B23K35/00; B23K35/22; B23K35/24; B23K35/30; C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/123; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; C04B2237/365; C04B2237/50; C04B2237/52; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A method according to claim 1, wherein the said braze material consists of an alloy of silicon with at least one of the metals of the group consisting of germanium, iron, gold, nickel, palladium, platinum, chromium, titanium, and wherein the said heating step is carried out in vacuum and at a temperature in the range of 1,120*C to 1,355*C for a period of 1 to 16 hours.
Claim 2
Dependent Claim
29 words
A method according to claim 2, wherein the said braze material consists of a germanium-silicon alloy containing at least 80 percent by weight of germanium, the balance being silicon.
Claim 3
Dependent Claim
25 words
A method according to claim 2, wherein the said braze material consists of an alloy of 65 percent nickel and 35 percent silicon, by weight.
Claim 4
Dependent Claim
25 words
A method according to claim 2, wherein the said braze material consists of an alloy of 45 percent iron and 55 percent silicon, by weight.
Claim 5
Dependent Claim
25 words
A method according to claim 2, wherein the said braze material consists of an alloy of 25 percent chromium and 75 percent silicon, by weight.
Claim 6
Dependent Claim
25 words
A method according to claim 2, wherein the said braze material consists of an alloy of 22 percent titanium and 78 percent silicon, by weight.
Claim 7
Dependent Claim
77 words
A method according to claim 1, wherein the said braze material consists of an alloy of silicon with a metal of the group consisting of chromium and titanium, together with up to 10 percent by weight of a metal of the group consisting of nickel and germanium, and wherein the said heating step is carried out in vacuum and at a temperature in the range of 1,120*C to 1,355*C for a period of 1 to 16 hours.
Claim 8
Dependent Claim
29 words
A method according to claim 8, wherein the proportion of the metal of the group consisting of nickel and germanium in the said alloy is 5 percent by weight.
Claim 9
Dependent Claim
28 words
A method according to claim 9, wherein the said braze material consists of an alloy of 5 percent nickel, 25.5 percent chromium and 72.5 percent silicon, by weight.
Claim 10
Dependent Claim
28 words
A method according to claim 9, wherein the said braze material consists of an alloy of 5 percent nickel, 19.5 percent titanium and 75.5 percent silicon, by weight.
Claim 11
Dependent Claim
28 words
A method according to claim 9, wherein the said braze material consists of an alloy of 5 percent germanium, 22.5 percent chromium and 72.5 percent silicon, by weight.
Claim 12
Dependent Claim
28 words
A method according to claim 9, wherein the said braze material consists of an alloy of 5 percent germanium, 19.5 percent titanium and 75.5 percent silicon, by weight.
References Cited (Backward Citations)
US2093390A
Cited
US3091028A
Cited
US3196536A
Cited
US3439858A
Cited
US3399076A
Cited
US3425116A
Cited
US3609856A
Cited
US3654694A
Cited
US3678568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |