Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1994-05-16
1996-09-03
Ryan, Patrick J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428368, 428375, 428378, 428388, 428698, 428902, 428903, 4272481, 427249, 427255, 4272552, 4274192, 4274197, C23C 1600, C23C 1626, B32B 900
Patent
active
055522203
ABSTRACT:
The pyrolytic carbon lamellar interphase is formed on the reinforcing fibers inside a chamber in which a plurality of successive cycles is performed, each cycle comprising: injecting a reaction gas in which the pyrolytic carbon precursor is selected from alkanes, excluding methane taken as a sole component, alkenes, alkynes, and aromatic hydrocarbons, and mixtures thereof; the gas is maintained inside the chamber for a first predetermined time period to form an interphase layer of controlled thickness of nanometer size; the gaseous reaction products are then evacuated during a second time period; the cycles being performed consecutively in the chamber until the thickness desired for the interphase has been obtained, thereby achieving a lamellar interphase that is highly anisotropic, whose lattice fringe texture has distorted fringes of total length (L.sub.2) not less than 4 nanometers on average with maximum values exceeding 10 nanometers.
REFERENCES:
patent: 4752503 (1988-06-01), Thebault
patent: 4823734 (1989-04-01), Christin
patent: 5026604 (1991-06-01), Thebault
"Pulse CVI of Porous Carbon", Kohzo Sugiyama, et al, Journal of Materials Science Letters 6 (1987), pp. 331-333.
"Reinforcement and Antioxidizing of Porous Carbon by Pulse CVI of SiC", Kohzo Sugiyama, et al, Journal of Materials Science 24 (1989) pp. 3756-3762.
"Quantitative Analysis of Carbon Coating Anisotropy for CMC Interfaces", X. Bourrat, et al., LCTS, Laboratoire des Composites Thermostructuraux, UMR 47:CNRS-SEP-UB, pp. 94-95.
"Electrically Conductive Grades of Carbon Black: Structure and Properties", Xavier Bourrat, Carbon vol. 31, No. 2. pp. 287-302, 1993.
"High Resolution TEM Studies of Carbonization and Graphitization", Anges Oberlin, Laboratoire Marcel Mathieu, CNRS-Universite, Pau, France. pp. 1-143.
Bourrat Xavier
Dupel Pascal
Goujard Stephane
Pailler Rene
Ryan Patrick J.
Societe Europeene de Propulsion
Weisberger Rich
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