Process for forming a protective coating containing aluminium and zirconium on a metal
US7608301B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Nov 22, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This relates to an improvement to the process of aluminization or activated cementation in which a donor cement containing the aluminium is attacked at high temperature and in a neutral or reducing atmosphere by a gaseous ammonium halide to form a gaseous aluminium halide which decomposes on contact with a nickel-based substrate depositing aluminium metal thereon.According to the invention the aluminium halide is at least partly replaced by a zirconium halide leading to the inclusion of zirconium in the deposit.Improvement in the protection of the hot parts of aircraft engines made of nickel-based superalloy.No figure is to be published.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.