Microstructures and mechanical properties of Hi-Nicalon fiber reinforced Si{sub 3}N{sub 4} matrix composites

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:567481

Nakano, K; Kume, S ^[1]; Sasaki, K; Saka, H ^[2]

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1. National Industrial Research Institute of Nagoya (Japan)
2. Univ. of Nagoya (Japan)

1D BN-coated Hi-Nicalon fiber reinforced Si{sub 3}N{sub 4} composites were fabricated by a slurry route followed by hot pressing. Microstructures of the composites were observed by either EPMA, SEM or TEM. Flexural strength and fracture toughness were measured at room temperature and 1400{degrees}C (Ar). BN-interphase seems to have loose bonding for a fiber and a matrix. Flexural strength and fracture toughness at RT were 702 MPa and 20.2 MPa{radical}m, whereas those at 1400{degrees}C were 426 MPa and 16.3 MPa{radical}m, respectively.

• OSTI ID: 567481
• Report Number(s): CONF-960106--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FIBERS
FLEXURAL STRENGTH
FRACTURE PROPERTIES
MATRIX MATERIALS
MICROSTRUCTURE
SILICON CARBIDES
SILICON NITRIDES
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 1000-4000 K