Fabrication of gas turbine water-cooled composite nozzle and bucket hardware employing plasma spray process
- 4 Hempshire Ct., Scotia, NY 12302
- R.D. #3, Western Ave., Amsterdam, NY 12010
- 301 Garnsey Rd., Rexford, NY 12148
In the method for fabrication of water-cooled composite nozzle and bucket hardware for high temperature gas turbines, a high thermal conductivity copper alloy is applied, employing a high velocity/low pressure (HV/LP) plasma arc spraying process, to an assembly comprising a structural framework of copper alloy or a nickel-based super alloy, or combination of the two, and overlying cooling tubes. The copper alloy is plamsa sprayed to a coating thickness sufficient to completely cover the cooling tubes, and to allow for machining back of the copper alloy to create a smooth surface having a thickness of from 0.010 inch (0.254 mm) to 0.150 inch (3.18 mm) or more. The layer of copper applied by the plasma spraying has no continuous porosity, and advantageously may readily be employed to sustain a pressure differential during hot isostatic pressing (HIP) bonding of the overall structure to enhance bonding by solid state diffusion between the component parts of the structure.
- Research Organization:
- General Electric Co., Boston, MA (United States)
- DOE Contract Number:
- EX-76-C-01-1806
- Assignee:
- Schilke; Peter W. (4 Hempshire Ct., Scotia, NY 12302); Muth; Myron C. (R.D. #3, Western Ave., Amsterdam, NY 12010); Schilling; William F. (301 Garnsey Rd., Rexford, NY 12148); Rairden, III; John R. (6 Coronet Ct., Schenectady, NY 12309)
- Patent Number(s):
- US 4370789
- OSTI ID:
- 864476
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
gas
turbine
water-cooled
composite
nozzle
bucket
hardware
employing
plasma
spray
process
method
temperature
turbines
thermal
conductivity
copper
alloy
applied
velocity
pressure
hv
lp
spraying
assembly
comprising
structural
framework
nickel-based
super
combination
overlying
cooling
tubes
plamsa
sprayed
coating
thickness
sufficient
completely
cover
allow
machining
create
smooth
surface
010
inch
254
150
18
layer
continuous
porosity
advantageously
readily
employed
sustain
differential
hot
isostatic
pressing
hip
bonding
overall
structure
enhance
solid
diffusion
component
thickness sufficient
temperature gas
plasma spray
smooth surface
thermal conductivity
gas turbine
pressure differential
plasma spraying
hot isostatic
assembly comprising
isostatic pressing
copper alloy
gas turbines
cooling tubes
composite nozzle
spray process
cooling tube
coating thickness
completely cover
structural framework
water-cooled composite
super alloy
structural frame
bucket hardware
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