Method of sealing by brazing of a metal part on a ceramic part
Abstract
Abstract The present invention relates to a method of brazing a fluidtight sealing joint between a metal part and a part of ceramic material, of the kind in which, before the actual brazing is carried out, the said ceramic part is first metallized by the application of a metallization product containing at least one metallic derivative, and sintering the said product, followed by nickelling of the ceramic part thus metallized, the operations of metallization being repeated twice, said method comprising the further steps of effecting the metallization of said ceramic part by applying said metallization product and effecting two successive nickelling operations on the ceramic part thus metallized, a first nickelling operation being effected chemically by the application of a nickelling product and reduction of said product under heat, while a second nickelling operation is carried out by an electrolytic process. The invention finds a particular application in the brazing of joints sealing a metallic conductor into a bore passing through a ceramic part.
Inventors
- 👤 Fernand Guillotin
- 👤 Rene Cerutti
Bibliographic Details
Claims Analysis
Total Claims: 8References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |