Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1993-07-06
1995-11-21
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
2041802, C25D 1302
Patent
active
054683580
ABSTRACT:
Methods for making fiber-reinforced carbon, ceramic or metal matrix composites using electrophoretic infiltration of an array or preform of electrically insulating fibers positioned adjacent a target electrode in an appropriate liquid slurry. The slurry contains a dispersion of micron- or submicron-sized particles, usually of elemental or ceramic materials, which are suitably electrically charged in the slurry, employing a surfactant if necessary. Application of an appropriate voltage causes charged particles to migrate toward the target electrode following a path that causes them to infiltrate the interstices of the fiber array which is usually formed of woven or aligned tows of minute fibers about 5 to 15 microns in diameter. The particles initially deposit on the electrode with subsequent particles aggregating on top of those particles, the process continuing to form a growth front of deposited material growing away from the electrode surface. The resultant deposit of aggregating particles grows through the interstices of the fibrous preform from one surface of the preform to the other, filling voids with matrix material. Following such infiltration, the impregnated particles are consolidated by hot-pressing and/or by subjection to CVI.
REFERENCES:
patent: 3498890 (1970-03-01), Divecha et al.
patent: 3505177 (1970-04-01), Chester et al.
patent: 3716461 (1973-02-01), Ahmad
patent: 4264422 (1981-04-01), Funabashi et al.
patent: 4659444 (1987-04-01), Iwata et al.
patent: 4975417 (1990-12-01), Koura
patent: 5041199 (1991-08-01), Di Franco
patent: 5073240 (1991-12-01), Raggio et al.
patent: 5196098 (1993-03-01), Rodriguez et al.
patent: 5254397 (1993-10-01), Kawai et al.
patent: 5302265 (1994-04-01), Dalzell et al.
Mizuguchi, et al., "A Highly Stable Nonaqueous Suspension for the Electophoretic Deposition of Powdered Substances" (Sep. 1983), J. Electrochem. Soc., vol. 130, No. 9, pp. 1819-1825.
L. Gal-Or, et al., "Deep Electrophoretic Penetration and Deposition of Ceramic Particles Inside Porous Substrates" (Apr. 1992), J. Electrochem. Soc., vol. 139, No. 4, pp. 1078-1081.
Browning, et al., "Deposition Forming Processes for Aerospace Structures" (Jan. 1964), Technical Documentary Report No. ML TDR 64-26, Air Force Materials Laboratory.
Sarkar, et al., "Structural Ceramic Microlaminates by Electrophoretic Deposition" (1992), Communications of the American Ceramic Society, vol. 75, No. 10, pp. 2907-2909.
Gutierrez, et al., "Electrophoretic Deposition: A Versatile Coating Method" (Oct. 1962), Journal of the Electrochemical Society, vol. 109, No. 10, pp. 923-927.
Elsner Frederick H.
Ohkawa Tihiro
General Atomics
Mayekar Kishor
Niebling John
LandOfFree
Fabrication of fiber-reinforced composites does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fabrication of fiber-reinforced composites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabrication of fiber-reinforced composites will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1134458