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Fabrication and Mechanical Properties of Si 3 N 4 /Carbon Fiber Composites with Aligned Microstructure Produced by a Seeding and Extrusion Method
Author(s) -
Hyuga Hideki,
Jones Mark I.,
Hirao Kiyoshi,
Yamauchi Yukihiko
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00894.x
Subject(s) - materials science , extrusion , composite material , microstructure , seeding , fabrication , fracture toughness , sintering , anisotropy , fiber , toughness , carbon fibers , composite number , medicine , alternative medicine , physics , pathology , quantum mechanics , engineering , aerospace engineering
Si 3 N 4 /carbon fiber composites have been produced with and without seeding by an extrusion and sintering process. In both cases the carbon fibers were aligned along the direction of extrusion, but the Si 3 N 4 grains were only aligned in the seeded material. The mechanical properties of the specimens showed anisotropy with respect to the grain alignment, with both strength and toughness being highest in the direction parallel to the extruding direction. In this direction the seeded specimen, where both the Si 3 N 4 grains and the carbon fibers were aligned, showed both higher fracture toughness and higher fracture strength than the nonseeded specimen where only the fibers were aligned.