Process for the preparation of fiber-reinforced ceramic composites by chemical vapor deposition
Patent
·
OSTI ID:865801
- Knoxville, TN
A chemical vapor deposition (CVD) process for preparing fiber-reinforced ceramic composites. A specially designed apparatus provides a steep thermal gradient across the thickness of a fibrous preform. A flow of gaseous ceramic matrix material is directed into the fibrous preform at the cold surface. The deposition of the matrix occurs progressively from the hot surface of the fibrous preform toward the cold surface. Such deposition prevents the surface of the fibrous preform from becoming plugged. As a result thereof, the flow of reactant matrix gases into the uninfiltrated (undeposited) portion of the fibrous preform occurs throughout the deposition process. The progressive and continuous deposition of ceramic matrix within the fibrous preform provides for a significant reduction in process time over known chemical vapor deposition processes.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4580524
- OSTI ID:
- 865801
- Country of Publication:
- United States
- Language:
- English
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apparatus
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ceramic matrix
chemical
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continuous
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fiber-reinforced
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fibrous
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prevents
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process time
processes
progressive
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result
significant
significant reduction
specially
specially designed
steep
surface
thermal
thermal gradient
thickness
throughout
time
undeposited
uninfiltrated
vapor
vapor deposition
apparatus
apparatus provides
becoming
ceramic
ceramic composite
ceramic composites
ceramic matrix
chemical
chemical vapor
cold
composites
continuous
cvd
deposition
deposition process
deposition processes
designed
directed
fiber-reinforced
fiber-reinforced ceramic
fibrous
flow
gaseous
gases
gradient
hot
material
matrix
matrix material
occurs
plugged
portion
preform
preparation
preparing
prevents
process
process time
processes
progressive
progressively
provides
reactant
reduction
reinforced ceramic
result
significant
significant reduction
specially
specially designed
steep
surface
thermal
thermal gradient
thickness
throughout
time
undeposited
uninfiltrated
vapor
vapor deposition