Brazed alloy
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- MORGAN ADVANCED CERAMICS INC
- Filing Date
- 2024-05-16
- Publication Date
- 2026-06-09
Smart Images
Figure 2026518660000001_ABST
Abstract
Claims
1. A brazing alloy composition, in weight %, Cu between 80 and 97.98, 2.0 ≤ Ge ≤ 9.5, 0 ≤ Al ≤ 2.0, 0 ≤ Si ≤ 1.0, 0 ≤ In ≤ 2.0, 0.02 < B ≤ 1.25, It contains unavoidable impurities, The brazing alloy composition is a brazing alloy composition containing 0.4 or less of Sn.
2. The brazing alloy composition according to claim 1, further comprising the remainder of the additives, excluding Cu, Ge, Sn, Al, Si, In, and B.
3. The brazing alloy composition according to claim 1, comprising 0 to 5.0% by weight of an additive.
4. The brazing alloy composition according to claim 1, wherein the additive contains, excluding Cu, one or more elements selected from the group consisting of transition metals and rare earth metals, or consists of them.
5. The brazing alloy composition according to claim 1, wherein the additive content is less than 1.0% by weight.
6. The brazing alloy composition according to claim 1, wherein the additives and impurities do not contain an amount of Sn exceeding 0.25% by weight of the total weight of the brazing alloy composition.
7. The brazing alloy composition according to claim 1, comprising a solidification temperature range of 90°C or less.
8. The brazing alloy composition according to claim 1, comprising a liquidus temperature in the range of 950°C to 1060°C.
9. The brazing alloy composition according to claim 1, comprising at least 38% formability of the brazing alloy composition, wherein formability is determined when 5 ± 1 grams of the brazing alloy composition is melted and formed in a button of about 0.25 inches in height and passes through two roll mills at room temperature, the gap between the rolls is adjusted to a reduction of about 10% of the height of the button, and the button passes through the rolls repeatedly until a thickness of 0.002 inches is achieved, which is considered to be 100% formability, or the formability is determined to be the thickness of the percentage of the starting height at which fracture is observed with the naked eye.
10. The addition of the aforementioned additive was performed at 700°C at a rate of 1.0 × 10 －８ mmHg (1.33×10 －６ The brazing alloy composition according to claim 1, which does not result in an increase in vapor pressure exceeding Pa.
11. 1 x 10 at 500°C －１１ mmHg (1.33×10 －９ The brazing alloy composition according to claim 1, comprising a vapor pressure less than Pa.
12. The brazing alloy composition according to claim 1, wherein the aforementioned unavoidable impurities include any one individual impurity element in an amount of 0.2% by weight or less.
13. The brazing alloy composition according to claim 1, wherein the brazing alloy composition is in the form of a wire, powder, preform, paste, or foil.
14. The brazing alloy composition according to claim 13, wherein the wire has a diameter in the range of 0.2 mm to 5.0 mm or 0.38 mm to 2.54 mm.
15. The brazed alloy composition according to claim 13, wherein the foil thickness is in the range of 25 μm to 500 μm.
16. A brazing alloy composition, in weight %, 2.0 ≤ Ge ≤ 9.5, 0 ≤ Al ≤ 2.0, 0 ≤ Si ≤ 1.0, 0 ≤ In ≤ 2.0, 0.02 < B ≤ 1.25, Additives ranging from 0 to 5.0, 0 ≤ Sn ≤ 0.4, Inevitable impurities less than 1.0, The remaining Cu, The aforementioned additive is a brazing alloy composition comprising one or more elements selected from the group consisting of rare earth metals and transition metals, excluding Cu.
17. The brazing alloy composition according to claim 16, comprising a maximum of 0.50% by weight, preferably a maximum of 0.30% by weight, and more preferably a maximum of 0.15% by weight of unavoidable impurities.
18. The brazing alloy composition according to claim 16, wherein the unavoidable impurities consist of Ge, B, Cu, Al, Si, In, Sn, and any element other than the additive.
19. The brazing alloy composition according to claim 16, wherein the unavoidable impurities, excluding oxygen, comprise any one individual impurity element in an amount of 0.2% by weight or less of the brazing alloy composition, and preferably comprise any one individual impurity element in an amount of 0.10% by weight or less of the brazing alloy composition.
20. In weight percentage, The brazing alloy composition according to claim 16, comprising 0.27 ≤ B ≤ 1.
25.
21. The brazing alloy composition according to claim 16, wherein the additive consists of one or more elements selected from the group consisting of Nb, Ni, Mo, W, Co, Cr, Fe, Ti, V, Zr, Au, Ag, Zn, Pt, Pd, Y, Yb, Nd, and Ce.
22. The brazing alloy composition according to claim 16, comprising a solidification temperature range of 90°C or less.
23. The brazing alloy composition according to claim 16, comprising a liquidus temperature in the range of 950°C to 1060°C.
24. The brazing alloy composition according to claim 16, wherein the additive contains or consists of one or more elements selected from the group consisting of transition metals and rare earth metals.
25. The brazing alloy composition according to claim 16, wherein the brazing alloy composition is in the form of a wire, powder, preform, paste, or foil.
26. The brazing alloy composition according to claim 16, wherein the wire has a diameter in the range of 0.2 mm to 5.0 mm or 0.38 mm to 2.54 mm.
27. The brazed alloy composition according to claim 16, wherein the foil thickness is in the range of 25 μm to 500 μm.
28. A brazed assembly comprising a first component and a second component joined together by a brazed joint, wherein the brazed joint comprises or is derived from the brazed alloy composition described in claim 1.
29. The brazed assembly according to claim 28, wherein the brazed joint is airtight.
30. The brazed joint is 1 x 10 －６ The brazed assembly according to claim 28, which passes a leak test (ASTM F2391 using helium gas) having an airtightness of atm. cc / s or less.
31. A brazed assembly comprising a first component and a second component joined together by a first brazed joint and a second brazed joint, wherein at least one of the first and second brazed joints comprises or is derivable from the brazed alloy composition according to claim 1.
32. The brazed assembly according to claim 31, wherein the first and second brazed joints comprise or are derived from the brazing alloy composition according to claim 1.
33. The brazed assembly according to claim 31, wherein the difference between the solidus temperature of the first brazed joint and the liquid phase temperature of the second brazed joint is at least +15°C.
34. The brazed assembly according to claim 31, wherein the first brazed joint comprises a brazing alloy composition configured to obtain a solidus temperature of at least 950°C, and the second brazed joint comprises a brazing alloy composition configured to obtain a liquid phase temperature of 1017°C or less.
35. An apparatus comprising a heat source and an envelope, wherein the envelope comprises the brazing assembly described in claim 28.
36. The apparatus according to claim 35, wherein the heat source is enclosed within the envelope or forms part of the envelope.
37. The apparatus according to claim 35, wherein the heat source is capable of heating at least a portion of the content of the envelope to over 800°C.
38. The apparatus according to claim 35, wherein the first or second component comprises copper.
39. The apparatus according to claim 35, wherein the first or second component includes a ceramic or a metallized ceramic.
40. The apparatus according to claim 35, wherein the first or second component comprises stainless steel, copper, copper alloy, nickel alloy, or Ni-Co-Fe alloy.
41. The apparatus according to claim 35, wherein the envelope is under vacuum.
42. A vacuum tube assembly comprising the apparatus described in claim 35.
43. A rapid heat treatment assembly comprising the apparatus described in claim 35.
44. A process for generating a brazed joint between a first component and a second component using the brazing alloy composition according to claim 1, wherein the brazing alloy composition is a. Optionally, the brazing alloy composition is held at a temperature 10°C to 400°C below its liquidus temperature for at least 10 minutes. b. The brazing alloy composition is heated to a brazing temperature exceeding the liquidus temperature, c. A process by which the brazed alloy composition is cooled to a temperature below the solidus temperature.
45. The process according to claim 44, comprising raising the brazing temperature between the solidus temperature and the liquidus temperature at a rate of 1°C / min to 30°C / min between the solidus temperature and the liquidus temperature of the brazing alloy.
46. The process according to claim 44, wherein the brazed joint is heated in a brazing furnace.
47. The process according to claim 44, comprising: heating a first brazing alloy composition to a first brazing temperature and cooling it to form a first brazing joint; and then heating a second brazing alloy composition to a second brazing temperature and cooling it to form a second brazing joint, wherein the first brazing alloy composition and the second brazing alloy composition are configured such that the solidus temperature of the first brazing joint is higher than the liquidus temperature of the second brazing joint, and the second brazing temperature is kept below the solidus temperature of the first brazing joint.
48. The process according to claim 44, wherein the brazed joint is formed by arranging the brazing alloy composition in the form of a wire, powder, paste, or foil adjacent to the first and second components to be joined; heating the brazing alloy composition above the liquidus temperature of the brazing alloy composition; and allowing the molten brazing alloy to flow between the first and second components via capillary action to form the brazed joint.
49. The process according to claim 44, wherein the formation of the brazed joint is carried out in a vacuum, reducing or protective atmosphere.
50. A brazed joint produced by or obtainable by the process described in any one of claims 44 to 49.
51. The brazed joint according to claim 50, wherein one or both of the first and second components include copper.
52. The brazed joint according to claim 50, wherein the brazed joint is a blind joint.
53. The brazed joint according to claim 50, wherein the brazed joint contains a lower proportion of boron compared to the brazing alloy composition, and one or both of the first and second components contain a detectable amount of boron derived from the brazing alloy composition.