Method of controlling thickness and aluminum content of a diffusion aluminide coating
US6334907B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Oct 13, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C10/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for forming a diffusion aluminide coating on a substrate, such as a component for a gas turbine engine. The process generally entails placing the substrate in a suitable coating chamber, flowing an inert or reducing gas into and through the coating chamber, and then aluminizing the substrate using an aluminizing technique with a substantially constant aluminum activity, such as a vapor phase deposition process. During the aluminizing process, the amount of unreacted aluminum within the coating chamber is controlled by altering the flow rate of the gas through the coating chamber so that a portion of the unreacted aluminum is swept from the coating chamber by the gas. The amount of unreacted aluminum swept from the coating chamber is regulated by metering the gas flow rate in order to control the aluminizing rate and aluminum content of the resulting aluminide coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.