Process for depositing hard coating in a nozzle orifice
Abstract
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 toerosion 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.
- Inventors:
-
- 5139 Fox Park Dr., Fairview, PA 16415
- 527 Lincoln Ave., Erie, PA 16505
- Issue Date:
- Research Org.:
- General Electric Co., Boston, MA (United States)
- OSTI Identifier:
- 868049
- Patent Number(s):
- 5061513
- Assignee:
- Flynn, Paul L. (5139 Fox Park Dr., Fairview, PA 16415);Giammarise, Anthony W. (527 Lincoln Ave., Erie, PA 16505)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02B - INTERNAL-COMBUSTION PISTON ENGINES
- DOE Contract Number:
- AC21-88MC23174
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- process; depositing; hard; coating; nozzle; orifice; directed; 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; toerosion; 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; /427/
Citation Formats
Flynn, Paul L, and Giammarise, Anthony W. Process for depositing hard coating in a nozzle orifice. United States: N. p., 1991.
Web.
Flynn, Paul L, & Giammarise, Anthony W. Process for depositing hard coating in a nozzle orifice. United States.
Flynn, Paul L, and Giammarise, Anthony W. Tue .
"Process for depositing hard coating in a nozzle orifice". United States. https://www.osti.gov/servlets/purl/868049.
@article{osti_868049,
title = {Process for depositing hard coating in a nozzle orifice},
author = {Flynn, Paul L and Giammarise, Anthony W},
abstractNote = {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 toerosion 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}