Process for reducing oxygen content in thermally sprayed metal coatings
US5707694A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | May 31, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C4/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for reducing oxygen content in metal coatings deposited by gas stabilized plasma spray techniques comprises the following steps. A metal powder is provided. Carbon is adhered and coated to the metal powder and a carbon coated metal powder is formed. A primary gas is provided to a plasma spray gun at a flow rate in the range of about 30-80 liter/min. A carrier gas is also provided to the plasma spray gun at a flow rate in the range of about 4-8 liter/min. The carbon coated metal powder is provided to the plasma gun at a flow rate in the range of about 30-85 gms/min. The plasma spray gun is positioned at a stand-off distance in the range of about 100-175 mm from a substrate. The plasma spray gun is energized with power in the range of about 28-42 kW. The carbon coated metal powder is sprayed onto the substrate and a metal coating having an oxygen content at least 20% by weight less than an oxygen content of the metal powder, is deposited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.