Innovative braze and brazing process for hermetic sealing between ceramic and metal components in a high-temperature oxidizing or reducing atmosphere
US8511535B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Apr 19, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12222
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A superior braze material, along with a method of producing the braze material and a method of sealing, joining or bonding materials through brazing is disclosed. The braze material is based on a metal oxide-noble metal mixture, typically Ag—CuO, with the addition of a small amount of metal oxide and/or metal such as TiO2, Al2O3, YSZ, Al, and Pd that will further improve wettability and joint strength. Braze filer materials, typically either in the form of paste or thin foil, may be prepared by a high-energy cryogenic ball milling process. This process allows the braze material to form at a finer size, thereby allowing more evenly dispersed braze particles in the resultant braze layer between on the surface of the ceramic substrate and metallic parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.