Process for strengthen grain boundaries of an article made from a Ni based superalloy
US7063740B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Feb 13, 2004 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Feb 13, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B33/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
It is disclosed a method for strengthen the grain boundaries of an article (1) made from a Ni based superalloy while the article (1) is in the solid state and containing at least one grain boundary. A surface diffusion process is applied to the article (1) to enrich the at least one grain boundary with grain boundary strengthening elements of one or a combination of boron, hafnium, zirconium without forming brittle precipitates like borides or carbides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.