Developing high toughness laminated HfB2-SiC ceramics with ductile Nb interlayer

Yuhang Bai; Mengyong Sun; Laifei Cheng; Shangwu Fan

doi:10.1016/j.ceramint.2019.06.249

Developing high toughness laminated HfB₂-SiC ceramics with ductile Nb interlayer

Yuhang Bai, Mengyong Sun, Laifei Cheng, Shangwu Fan

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

19 Scopus citations

Abstract

Herein, laminated HfB₂-SiC/Nb ceramic with multi-layered structure was synthesized via tape casting and spark plasma sintering. Despite minor loss in strength of laminated HfB₂-SiC/Nb ceramics (447 ± 12 MPa) compared with that of monolithic HfB₂-SiC ceramics (470 ± 16 MPa) following the introduction of ductile weak Nb interlayer, fracture toughness of laminated ceramics reached 14.22 ± 0.6 MPa m^1/2, showing an improvement of ∼129% in comparison with monolithic ceramics (6.11 ± 0.3 MPa m^1/2). Cooperative toughening mechanisms of crack behavior (deflection and delamination) and plastic deformation (dimples and tear ridges) led to the improvement in toughness. This research provides novel strategy for the development of heterogeneous ceramic–metal layered composites with superior fracture toughness.

Original language	English
Pages (from-to)	20977-20982
Number of pages	6
Journal	Ceramics International
Volume	45
Issue number	16
DOIs	https://doi.org/10.1016/j.ceramint.2019.06.249
State	Published - Nov 2019

Keywords

Fracture toughness
HfB-SiC ceramics
Multi-layered structure
Nb interlayer

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10.1016/j.ceramint.2019.06.249

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title = "Developing high toughness laminated HfB2-SiC ceramics with ductile Nb interlayer",

abstract = "Herein, laminated HfB2-SiC/Nb ceramic with multi-layered structure was synthesized via tape casting and spark plasma sintering. Despite minor loss in strength of laminated HfB2-SiC/Nb ceramics (447 ± 12 MPa) compared with that of monolithic HfB2-SiC ceramics (470 ± 16 MPa) following the introduction of ductile weak Nb interlayer, fracture toughness of laminated ceramics reached 14.22 ± 0.6 MPa m1/2, showing an improvement of ∼129% in comparison with monolithic ceramics (6.11 ± 0.3 MPa m1/2). Cooperative toughening mechanisms of crack behavior (deflection and delamination) and plastic deformation (dimples and tear ridges) led to the improvement in toughness. This research provides novel strategy for the development of heterogeneous ceramic–metal layered composites with superior fracture toughness.",

keywords = "Fracture toughness, HfB-SiC ceramics, Multi-layered structure, Nb interlayer",

author = "Yuhang Bai and Mengyong Sun and Laifei Cheng and Shangwu Fan",

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year = "2019",

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doi = "10.1016/j.ceramint.2019.06.249",

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T1 - Developing high toughness laminated HfB2-SiC ceramics with ductile Nb interlayer

AU - Bai, Yuhang

AU - Sun, Mengyong

AU - Cheng, Laifei

AU - Fan, Shangwu

PY - 2019/11

Y1 - 2019/11

N2 - Herein, laminated HfB2-SiC/Nb ceramic with multi-layered structure was synthesized via tape casting and spark plasma sintering. Despite minor loss in strength of laminated HfB2-SiC/Nb ceramics (447 ± 12 MPa) compared with that of monolithic HfB2-SiC ceramics (470 ± 16 MPa) following the introduction of ductile weak Nb interlayer, fracture toughness of laminated ceramics reached 14.22 ± 0.6 MPa m1/2, showing an improvement of ∼129% in comparison with monolithic ceramics (6.11 ± 0.3 MPa m1/2). Cooperative toughening mechanisms of crack behavior (deflection and delamination) and plastic deformation (dimples and tear ridges) led to the improvement in toughness. This research provides novel strategy for the development of heterogeneous ceramic–metal layered composites with superior fracture toughness.

AB - Herein, laminated HfB2-SiC/Nb ceramic with multi-layered structure was synthesized via tape casting and spark plasma sintering. Despite minor loss in strength of laminated HfB2-SiC/Nb ceramics (447 ± 12 MPa) compared with that of monolithic HfB2-SiC ceramics (470 ± 16 MPa) following the introduction of ductile weak Nb interlayer, fracture toughness of laminated ceramics reached 14.22 ± 0.6 MPa m1/2, showing an improvement of ∼129% in comparison with monolithic ceramics (6.11 ± 0.3 MPa m1/2). Cooperative toughening mechanisms of crack behavior (deflection and delamination) and plastic deformation (dimples and tear ridges) led to the improvement in toughness. This research provides novel strategy for the development of heterogeneous ceramic–metal layered composites with superior fracture toughness.

KW - Fracture toughness

KW - HfB-SiC ceramics

KW - Multi-layered structure

KW - Nb interlayer

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DO - 10.1016/j.ceramint.2019.06.249

M3 - 文章

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SN - 0272-8842

VL - 45

SP - 20977

EP - 20982

JO - Ceramics International

JF - Ceramics International

IS - 16

ER -

Developing high toughness laminated HfB₂-SiC ceramics with ductile Nb interlayer

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Keywords

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