Apparatus for depositing hard coating in a nozzle orifice
- Fairview, PA
- Erie, PA
The present invention is directed to a process for coating the interior surfaces of an orifice in a substrate that forms a slurry fuel injection nozzle. In a specific embodiment, the nozzle is part of a fuel injection system for metering a coal-water slurry into a large, medium-speed, multi-cylinder diesel engine. In order to retard erosion of the orifice, the substrate is placed in a chemical vapor deposition (CVD) reaction chamber. A reaction gas is passed into the chamber at a gas temperature below its reaction temperature and is directed through the orifice in the substrate. The gas reaction temperature is a temperature at and above which the reaction gas deposits as a coating, and the reaction gas is of a composition whereby improved resistance to erosion by flow of the particulates in the slurry fuel is imparted by the deposited coating. Only the portion of the substrate in proximity to the orifice to be coated is selectively heated to at least the gas reaction temperature for effecting coating of the orifice's interior surfaces by the vapor deposited coating formed from the reaction gas.
- Research Organization:
- General Electric Co., Boston, MA (United States)
- DOE Contract Number:
- AC21-88MC23174
- Assignee:
- General Electric Company (Erie, PA)
- Patent Number(s):
- US 5391233
- OSTI ID:
- 869753
- Country of Publication:
- United States
- Language:
- English
Similar Records
Apparatus and process for depositing hard coating in a nozzle orifice
Apparatus and process for depositing hard coating in a nozzle orifice
Related Subjects
depositing
hard
coating
nozzle
orifice
directed
process
interior
surfaces
substrate
forms
slurry
fuel
injection
specific
embodiment
metering
coal-water
medium-speed
multi-cylinder
diesel
engine
retard
erosion
placed
chemical
vapor
deposition
cvd
reaction
chamber
gas
passed
temperature
below
deposits
composition
whereby
improved
resistance
flow
particulates
imparted
deposited
portion
proximity
coated
selectively
heated
effecting
formed
deposited coating
gas temperature
coating formed
water slurry
coal-water slurry
reaction gas
diesel engine
vapor deposited
temperature below
chemical vapor
reaction chamber
vapor deposition
interior surface
reaction temperature
fuel injection
interior surfaces
slurry fuel
specific embodiment
gas reaction
improved resistance
selectively heated
retard erosion
whereby improved
multi-cylinder diesel
nozzle orifice
injection nozzle
hard coating
composition whereby
gas deposits
effecting coating
depositing hard
/118/