Interfacial microstructure and chemistry of SiC/BN dual-coated Nicalon-fiber-reinforced glass-ceramic matrix composites

Journal Article · Sun May 01 00:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb05411.x· OSTI ID:7045146

Sun, E Y; Nutt, S R ^[1]; Brennan, J J ^[2]

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1. Brown Univ., Providence, RI (United States). Div. of Engineering
2. United Technologies Research Center, East Hartford, CT (United States)

Glass-ceramic composites with improved high-temperature mechanical properties have been produced by incorporating continuous SiC fibers into a barium magnesium aluminosilicate matrix. Control of the fiber/matrix interface was achieved by a dual-layer coating of SiC/BN(C) applied to the fibers by CVD. The weakly bonded interface resulted in composites with high fracture toughness and strength up to 1,100 C, and the composite system was oxidatively stable during long-term exposure to air at high temperatures. Composites with different thermal and mechanical histories were studied, and interfaces were characterized using transmission electron microscopy (TEM), Auger electron spectroscopy, and fiber pushout tests. Observations of interfacial microstructure were correlated with the mechanical properties of the composite and with interface properties determined from fiber push-out tests.

• OSTI ID: 7045146
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:5; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
BARIUM COMPOUNDS
BORON COMPOUNDS
BORON NITRIDES
CARBIDES
CARBON COMPOUNDS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COATINGS
COMPOSITE MATERIALS
DEPOSITION
GLASS
INTERFACES
MAGNESIUM COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PNICTIDES
SILICATES
SILICON CARBIDES
SILICON COMPOUNDS
SURFACE COATING