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Fracture Energy of an Aligned Porous Silicon Nitride
Author(s) -
Inagaki Yoshiaki,
Ohji Tatsuki,
Kanzaki Shuzo,
Shigegaki Yasuhiro
Publication year - 2000
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.1151-2916.2000.tb01468.x
Subject(s) - materials science , silicon nitride , fracture (geology) , composite material , porosity , nitride , silicon , fracture mechanics , interlocking , beam (structure) , fracture toughness , chevron (anatomy) , metallurgy , layer (electronics) , structural engineering , geology , paleontology , engineering
The fracture energy of a porous silicon nitride with aligned fibrous grains was investigated, using a chevron‐notched‐beam technique. A crack was constrained to propagate normal to the grain alignment. The obtained fracture energy was ∼500 J/m 2 , which was ∼7 times larger than that of a dense silicon nitride with randomly oriented fibrous grains. The large fracture energy was attributable primarily to the sliding resistance associated with interlocking grains.