Residual stresses and mechanical properties of Si3N4/SiC multilayered composites with different SiC layers

Shichao Liu; Yuanming Li; Ping Chen; Wenjie Li; Shixin Gao; Biao Zhang; Feng Ye

doi:10.1016/j.bsecv.2016.11.003

Boletín de la Sociedad Española de Cerámica y Vidrio (Jul 2017)

Residual stresses and mechanical properties of Si3N4/SiC multilayered composites with different SiC layers

Shichao Liu,
Yuanming Li,
Ping Chen,
Wenjie Li,
Shixin Gao,
Biao Zhang,
Feng Ye

Affiliations

Shichao Liu: Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory, Chengdu 610200, China
Yuanming Li: Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory, Chengdu 610200, China
Ping Chen: Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory, Chengdu 610200, China
Wenjie Li: Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory, Chengdu 610200, China
Shixin Gao: Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory, Chengdu 610200, China
Biao Zhang: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Feng Ye: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

DOI: https://doi.org/10.1016/j.bsecv.2016.11.003
Journal volume & issue: Vol. 56, no. 4
pp. 147 – 154

Abstract

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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.

Published in Boletín de la Sociedad Española de Cerámica y Vidrio

ISSN: 0366-3175 (Print)
Publisher: Elsevier
Country of publisher: Spain
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: https://www.journals.elsevier.com/boletin-de-la-sociedad-espanola-de-ceramica-y-vidrio/

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