Fabrication and properties of ceramic composites with a boron nitride matrix
Creators
- 1. Univ. of Illinois, Urbana, IL (United States). Dept. of Materials Science and Engineering
Description
Boron nitride (BN) matrix composites reinforced by a number of different ceramic fibers have been prepared using a low-viscosity, borazine oligomer which converts in very high yield to a stable BN matrix when heated to 1,200 C. Fibers including Nicalon (SiC), FP (Al2O3), Sumica and Nextel 440 (Al2O3-SiO2) were evaluated. The Nicalon/BN and Sumica/BN composites displayed good flexural strengths of 380 and 420 MPa, respectively, and modulus values in both cases of 80 GPa. On the other hand, FP/BN and Nextel/BN composites exhibited very brittle behavior. Nicalon fiber with a carbon coating as a buffer barrier improved the strength by 30%, with a large amount of fiber pullout from the BN matrix. In all cases except for Nicalon, the composites showed low dielectric constant and loss
Additional details
Publishing Information
- Journal Title
- Journal of the American Ceramic Society
- Journal Volume
- 78
- Journal Issue
- 6
- Journal Page Range
- p. 1546-1552.
- ISSN
- 0002-7820
- CODEN
- JACTAW
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26072922
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM OXIDES; ALUMINIUM SILICATES; BORON NITRIDES; CARBON; COATINGS; COMPOSITE MATERIALS; DIELECTRIC PROPERTIES; FABRICATION; FLEXURAL STRENGTH; FRACTURE PROPERTIES; INFRARED SPECTRA; ORGANIC BORON COMPOUNDS; PYROLYSIS; SCANNING ELECTRON MICROSCOPY; SILICON CARBIDES; X-RAY DIFFRACTION
- Descriptors DEC
- ALUMINIUM COMPOUNDS; BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COHERENT SCATTERING; DECOMPOSITION; DIFFRACTION; ELECTRICAL PROPERTIES; ELECTRON MICROSCOPY; ELEMENTS; MATERIALS; MECHANICAL PROPERTIES; MICROSCOPY; NITRIDES; NITROGEN COMPOUNDS; NONMETALS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PNICTIDES; SCATTERING; SILICATES; SILICON COMPOUNDS; SPECTRA