Open AccessResidual stresses and mechanical properties of Si 3 N 4 /SiC multilayered composites with different SiC layers
Author(s) -
Shichao Liu,
Yuanming Li,
Ping Chen,
Wenjie Li,
Shixin Gao,
Biao Zhang,
Feng Ye
Publication year - 2017
Publication title -
boletín de la sociedad española de cerámica y vidrio
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.462
H-Index - 24
eISSN - 2173-0431
pISSN - 0366-3175
DOI - 10.1016/j.bsecv.2016.11.003
Subject(s) - materials science , fracture toughness , composite material , residual stress , ultimate tensile strength , delamination (geology) , ceramic , toughness , tape casting , paleontology , biology , subduction , tectonics
The effect of residual stresses on the strength, toughness and work of fracture of Si3N4/SiC multilayered composites with different SiC layers has been investigated. It may be an effective way to design and optimize the mechanical properties of Si3N4/SiC multilayered composites by controlling the properties of SiC layers. Si3N4/SiC multilayered composites with different SiC layers were fabricated by aqueous tape casting and pressureless sintering. Residual stresses were calculated by using ANSYS simulation, the maximum values of tensile and compressive stresses were 553.2 MPa and −552.1 MPa, respectively. Step-like fracture was observed from the fracture surfaces. Fraction of delamination layers increased with the residual stress, which can improve the reliability of the materials. Tensile residual stress was benefit to improving toughness and work of fracture, but the strength of the composites decreased
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