Damage tolerant ceramic matrix composites by a precursor infiltr

Details Damage tolerant ceramic matrix composites by a precursor infiltr Damage tolerant ceramic matrix composites by a precursor infiltr

1997-10-02

1999-01-05

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 974, 501128, 501 12, C04B 3580

Patent

active

058562524

ABSTRACT:
Damage-tolerant, continuous fiber ceramic matrix composites are fabricated to fill the space between the fibers with a powder. The powder particles are heat treated to form a porous framework without shrinkage, which is then strengthened with an inorganic synthesized from a precursor in solution. High particle packing densities is achieved within the fiber preform using a small particle-to-fiber diameter ratio. Filling the interstices with a powder increases the composite density and also limits the size of the crack-like voids within the matrix. The ceramic matrix composite (CMC) has mechanical characteristics similar to those found in wood. It is also affordable and inherently oxidation resistant. The composite is characterized by a heterogeneous distribution of fibers within a porous matrix having a homogeneous, fine porosity. A residual stress from thermal expansion mismatch of the matrix and fibers is created in the composite. The illustrated embodiment uses Al.sub.2 O.sub.3 fibers with either mullite or Si.sub.3 N.sub.4 matrices.

REFERENCES:
patent: 4461842 (1984-07-01), Jamet
patent: 4568594 (1986-02-01), Hordonneau et al.
patent: 4814127 (1989-03-01), Toyoda
patent: 4828774 (1989-05-01), Anderson et al.
patent: 4917941 (1990-04-01), Hillig et al.
patent: 5025045 (1991-06-01), Gawin et al.
patent: 5077243 (1991-12-01), Nakano et al.
patent: 5098871 (1992-03-01), Ray
patent: 5133993 (1992-07-01), Steckert et al.
patent: 5145812 (1992-09-01), Arai et al.
patent: 5167271 (1992-12-01), Lange et al.
patent: 5196235 (1993-03-01), Parlier et al.
patent: 5238710 (1993-08-01), Ahmad et al.
patent: 5246736 (1993-09-01), Goujard et al.
patent: 5294460 (1994-03-01), Tani et al.
patent: 5306554 (1994-04-01), Harrison
patent: 5336522 (1994-08-01), Balhadere et al.
patent: 5338707 (1994-08-01), Inui
patent: 5366686 (1994-11-01), Mortensen et al.
patent: 5459114 (1995-10-01), Kaya et al.
patent: 5494867 (1996-02-01), Schwab et al.
Walker et al., Preparation & Properties of Monolithic & Composite ceramics Produced by Polymer Pyrolysis; Ceramic Bulletin; pp. 916-923; 1983.
Tu et al., Liquid Precursor Infiltration & Pyrolysis of Powder Compacts, I: Kinetic Studies & Microstructure Development; sent to J. Am. Ceram. Society
Tu et al., Liquid Precursor Infiltration & Pyrolysis of Powder Compacts:II; Fracture Toughness & Strength; sent to J. Amer. Ceram. Society
Tu et al., Synthetic High-Temp. Wood: A Novel Class of Affordable, Damage Tolerant Ceramic Composite; sent to J. Am. Ceram. Soc.
Sudre et al., Effect of Inclusions on Densification: 1, Microstructural Devel. in an Al.sub.2 O.sub.3 Matrix Cont. a High vol. Fraction of ZrO.sub.2 Inclusions; J. Am. Ceram. Soc; v 75, n 3; 519-24; 1992
Lam et al., Mechanical Properties of Partially Dense Alumina Produced from Powder Compacts; J. Am. Ceram. Soc.; v 77, n 8; pp. 2113-2117; 1994
Lange et al., Powder Processing and Densification of Ceramic Composites; Mat. Res. Soc. Proc., Vol. 155; 1989
Lange et al., Pressure Filtration: Consolidation Kinetics & Mrchanics; Am. Ceram. Soc. Bull.; v 66; n 10; pp. 1498-1504; 1987
Velamakanni et al., New Meth. for Efficient Colloidal Particle Packing via Modulation of Repulsive Lub. Hrdration Forces; Langmuir; v 6; n 7, pp. 1323-1325; 1990
Zok et al., Packing Density of Composite Powder Mixtures; J. Am. Ceram. Soc.; v 74; n 8; pp. 1880-1885; 1991.
Lange et al., Method for Processing Metal-Reinforced Ceramic Composites; J. Am. Ceram. Soc.; v 73; n 2; pp. 388-393; 1990.
Folsom et al., Mech. Behavior of a Laminar Ceramic / Fiber-Reinforced Epoxy Composite; J. Am. Ceram. Soc.; v 75; n 11; pp. 2969-2975; 1992.
Bischoff et al., Microstructural Studies if the Interfacial Zone of a SiC-Fiber-Reinforced Lithium Aluminum Silicate Glass-Ceramic; J. Am. Ceram. Soc.; v 72; n 5; pp. 741-45; 1989.
Folsom et al., Flexural Properties of Brittle Multilayer Materials: 1, Modeling; J. Am. Ceram. Soc.; v 77; n 3; pp. 689-96; 1994.
Glass et al., Surface Modification of Ceramics by Partial Infiltration; Advanced Ceramic Materials; v 2; n 2; pp. 129-131; 1987.
Marple et al., Incorporation of Mullite as a Second Phase into alumina by an Infiltration Technique; Comm. of the American Ceramic Society; v 7. n 11; pp. C471-C473; 1988.
Sacks et al.; Prep. of SiO.sub.2 Glass from Model Powder Compacts:III, Enhanced Densification by Sol Infiltration; J. Amer. Ceram. Soc.; v 71; n 4; pp. 245-249; 1988

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