Particle injection device for thermal spraying
US4901921A · kind A · utility
5Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Feb 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is described a method and an apparatus wherein particles and a carrier gas are injected under pressure into a plasma flame. The particles are completely melted and are theraefter propelled onto a substrate to produce a coating thereon. According to the invention, the speed of the particles is slowed down and the flow of the gas carrier is adjusted, such as by disposing a cyclone ahead of the plasma flame, so as to provide an efficient injection of the particles in the center of the plasma flame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.