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 Title: |
US4580524:
Process for the preparation of fiber-reinforced ceramic composites by chemical vapor deposition
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Lackey, Jr., Walter J.; Oak Ridge, TN
Caputo, Anthony J.; Knoxville, TN
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| Assignee: |
The United States of America as represented by the United States Department of Energy, Washington, DC
other patents from UNITED STATES OF AMERICA, DEPARTMENT OF ENERGY (597195) (approx. 6,712)
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| Published / Filed: |
1986-04-08
/ 1984-09-07
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| Application Number: |
US1984000648398
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| IPC Code: |
Advanced:
C04B 35/80;
C23C 16/04;
C23C 16/44;
Core:
more...
IPC-7:
C23C 16/46;
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| U.S. Class: |
Current:
118/725;
118/724;
118/732;
118/733;
427/237;
427/255.24;
Original:
118/725;
118/724;
118/732;
118/733;
427/237;
427/255.2;
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| Field of Search: |
118/724,725,732,728,715,733
427/255.2,243,237
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| Government Interest: |
The U.S. Government has rights in this invention pursuant to Contract No. DE-W-7405-eng-26 between the U.S. Department of Energy and Union Carbide Corporation, Nuclear Division.
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| Priority Number: |
| 1984-09-07 |
US1984000648398 |
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| Abstract: |
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.
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| Attorney, Agent or Firm: |
Larcher, Earl L. ;
Hamel, Stephen D. ;
Hightower, Judson R. ;
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| Primary / Asst. Examiners: |
Plantz, Bernard F.;
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 8 claims |
What is claimed is:
1. Apparatus for performing vapor deposition on a fibrous or porous substrate, comprising:
- (a) a housing having a chamber with an opening at one end thereof;
- (b) means for mounting a porous or fibrous substrate having opposite surfaces and outer edges in said opening in the housing chamber with said outer edges spaced from said housing for defining therewith a gas receiving void in registry with said housing chamber;
- (c) heating means in association with the housing chamber for heating the surface of the fibrous substrate facing into the housing chamber;
- (d) cooling means for cooling the surface of the fibrous substrate facing away from the housing chamber;
- (e) means for providing a flow of reactant gas to the cooled surface of the fibrous substrate;
- (f) seal means disposed between said housing and the cooled surface of the substrate for conducting the reactant gas into said substrate; and
- (g) means exhausting from the housing chamber the gases exiting the heated surface of the fibrous substrate during initial phases of the vapor deposition and then from the edges of the substrate through said gas receiving void from the housing chamber,
- the heating means and the cooling means, when in use, creating a temperature gradient across the fibrous substrate.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
Show description
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| Forward References: |
Show 46 U.S. patent(s) that reference this one
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| Foreign References: |
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PDF |
Publication |
Date |
IPC Code |
Assignee |
Title |
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CA0471232
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1951-01 |
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JP53041832
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1978-11 |
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| Other References: |
Pierson, H. O., "Boron Nitride Composites by CVD," J. Composite Materials, vol. 9, Jul. 1975, pp. 228-240.
(13 pages)
Cited by 5 patents
Christin, F., et al., "A Thermodynamic and Experimental Approach of SIL-CVD Application to the CVD-Infiltration of Porous Carbon-Carbon Composites," Seventh Intl. Conf. on CVD, 1979, pp. 499-514.
Gebhart, J. J., "CVD Boron Nitride Infiltration of Fiborous Structures: Properties of Low Temp. Deposits", 4th Intl. Conf. on CVD, Boston, 1973, pp. 460-471.
Newkirk et al., "Preparation of Fiber Reinforced Titanium Diboride and Boron Carbide Composite Bodies", Seventh Intl. Conf. on CVD (1979), pp. 515-517, 520 and 521.
Newkirk et al., "CVD Fabrication of Filament-Reinforced Composites for High Temp. Applications", Chemically Vapor Deposited Coatings, American Ceramic Soc. (1981), pp. 84,86,88,90,92,94,96,98,100.
Pfieter et al., "Consolidation of Composite Structures by CVD," 2nd Intl. Conf. on CVD, Los Angeles, May 10-15, 1970, The Electrochemical Society, pp. 463,466,467,470,471,474,475,478,479,482 and 483.
Kotlensky, et al., "SiC Oxidation Protection Coatings for Carbon/Carbon Composites", The 3rd Intl. Conf. on CVD Salt Lake City, Utah, Apr. 24-27, 1972, American Nuclear Society, pp. 573,575,577,579,581,583,585,587 and 589.
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