A route to increase fracture toughness of layered Si3N4/SiC composite using interlocked interfaces

Feng Ye; Shichao Liu; Shengqing Hu; Haixia Yang; Qiang Liu; Biao Zhang

doi:10.1016/j.ceramint.2015.04.102

A route to increase fracture toughness of layered Si₃N₄/SiC composite using interlocked interfaces

Feng Ye^*
, Shichao Liu
, Shengqing Hu
, Haixia Yang
, Qiang Liu
, Biao Zhang

^*Corresponding author for this work

Harbin Institute of Technology
Central South University

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Abstract Multilayer Si₃N₄/SiC composite with interwoven interfaces was designed and prepared via the aqueous tape casting and gas pressure sintering process. This composite had relatively uniform layer thickness, high strength (∼564 MPa), toughness (∼16.8 MPa m^1/2) and work-of-fracture (∼4411 J/m²). The first-level toughening mechanism started from the fracture surface of the multilayer composite. Obvious crack deflection was found in the Si₃N₄ and SiC layers. At the same time, the pullout and fractured rodlike β-Si₃N₄ grains were detected along the interfaces of the composite. The growth of the rodlike β-Si₃N₄ grains (the grain size>50 μm) along the interfaces was determined by the vapor phase transport mechanism. Both rich SiO₂ on the surfaces of the SiC/Si₃N₄ particles and high porosity of the SiC layers were contributed to the growth of β-Si₃N₄ grains.

Original language	English
Article number	10509
Pages (from-to)	10331-10335
Number of pages	5
Journal	Ceramics International
Volume	41
Issue number	8
DOIs	https://doi.org/10.1016/j.ceramint.2015.04.102
State	Published - 1 Sep 2015
Externally published	Yes

Keywords

Aqueous tape casting
C. Mechanical property
Interlocked interface
Multilayer composite

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10.1016/j.ceramint.2015.04.102

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@article{39dbfb2c3efc47e79e4dbe74806b1d72,

title = "A route to increase fracture toughness of layered Si3N4/SiC composite using interlocked interfaces",

abstract = "Abstract Multilayer Si3N4/SiC composite with interwoven interfaces was designed and prepared via the aqueous tape casting and gas pressure sintering process. This composite had relatively uniform layer thickness, high strength (∼564 MPa), toughness (∼16.8 MPa m1/2) and work-of-fracture (∼4411 J/m2). The first-level toughening mechanism started from the fracture surface of the multilayer composite. Obvious crack deflection was found in the Si3N4 and SiC layers. At the same time, the pullout and fractured rodlike β-Si3N4 grains were detected along the interfaces of the composite. The growth of the rodlike β-Si3N4 grains (the grain size>50 μm) along the interfaces was determined by the vapor phase transport mechanism. Both rich SiO2 on the surfaces of the SiC/Si3N4 particles and high porosity of the SiC layers were contributed to the growth of β-Si3N4 grains.",

keywords = "Aqueous tape casting, C. Mechanical property, Interlocked interface, Multilayer composite",

author = "Feng Ye and Shichao Liu and Shengqing Hu and Haixia Yang and Qiang Liu and Biao Zhang",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd and Techna Group S.r.l.",

year = "2015",

month = sep,

day = "1",

doi = "10.1016/j.ceramint.2015.04.102",

language = "英语",

volume = "41",

pages = "10331--10335",

journal = "Ceramics International",

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}

TY - JOUR

T1 - A route to increase fracture toughness of layered Si3N4/SiC composite using interlocked interfaces

AU - Ye, Feng

AU - Liu, Shichao

AU - Hu, Shengqing

AU - Yang, Haixia

AU - Liu, Qiang

AU - Zhang, Biao

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Abstract Multilayer Si3N4/SiC composite with interwoven interfaces was designed and prepared via the aqueous tape casting and gas pressure sintering process. This composite had relatively uniform layer thickness, high strength (∼564 MPa), toughness (∼16.8 MPa m1/2) and work-of-fracture (∼4411 J/m2). The first-level toughening mechanism started from the fracture surface of the multilayer composite. Obvious crack deflection was found in the Si3N4 and SiC layers. At the same time, the pullout and fractured rodlike β-Si3N4 grains were detected along the interfaces of the composite. The growth of the rodlike β-Si3N4 grains (the grain size>50 μm) along the interfaces was determined by the vapor phase transport mechanism. Both rich SiO2 on the surfaces of the SiC/Si3N4 particles and high porosity of the SiC layers were contributed to the growth of β-Si3N4 grains.

AB - Abstract Multilayer Si3N4/SiC composite with interwoven interfaces was designed and prepared via the aqueous tape casting and gas pressure sintering process. This composite had relatively uniform layer thickness, high strength (∼564 MPa), toughness (∼16.8 MPa m1/2) and work-of-fracture (∼4411 J/m2). The first-level toughening mechanism started from the fracture surface of the multilayer composite. Obvious crack deflection was found in the Si3N4 and SiC layers. At the same time, the pullout and fractured rodlike β-Si3N4 grains were detected along the interfaces of the composite. The growth of the rodlike β-Si3N4 grains (the grain size>50 μm) along the interfaces was determined by the vapor phase transport mechanism. Both rich SiO2 on the surfaces of the SiC/Si3N4 particles and high porosity of the SiC layers were contributed to the growth of β-Si3N4 grains.

KW - Aqueous tape casting

KW - C. Mechanical property

KW - Interlocked interface

KW - Multilayer composite

UR - https://www.scopus.com/pages/publications/84930929916

U2 - 10.1016/j.ceramint.2015.04.102

DO - 10.1016/j.ceramint.2015.04.102

M3 - 文章

AN - SCOPUS:84930929916

SN - 0272-8842

VL - 41

SP - 10331

EP - 10335

JO - Ceramics International

JF - Ceramics International

IS - 8

M1 - 10509

ER -

A route to increase fracture toughness of layered Si₃N₄/SiC composite using interlocked interfaces

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Keywords

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