Mechanical properties of unidirectionally oriented SiC-whisker-reinforced Si[sub 3]N[sub 4] fabricated by extrusion and hot-pressing

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb03920.x· OSTI ID:6460184

Goto, Yasuhiro; Tsuge, Akihiko ^[1]

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1. Toshiba Corp., Kawasaki (Japan)

SiC-whisker-reinforced Si[sub 3]N[sub 4] was fabricated by extrusion and hot-pressing. A unidirectional alignment of the whiskers was achieved through sheet forming by extrusion. The degree of whisker orientation changed with the thickness of the green sheets. Unidirectionally oriented whiskers increased fracture strength and toughness compared to samples with more randomly oriented whiskers. Anisotropy of fracture strength was observed. Bridging by whiskers impeded crack propagation when the whisker orientation was perpendicular to the crack plane.

• OSTI ID: 6460184
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:6; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ANISOTROPY
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
CRACK PROPAGATION
CRYSTALS
DATA
EXPERIMENTAL DATA
EXTRUSION
FABRICATION
FRACTURE PROPERTIES
HOT PRESSING
INFORMATION
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MONOCRYSTALS
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
PNICTIDES
PRESSING
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
WHISKERS