High toughness in laminated SiC ceramics from aqueous tape casting

Jingxian Zhang; Rong Huang; Hui Gu; Dongliang Jiang; Qingling Lin; Zhengren Huang

doi:10.1016/j.scriptamat.2004.10.026

High toughness in laminated SiC ceramics from aqueous tape casting

Jingxian Zhang, Rong Huang, Hui Gu, Dongliang Jiang, Qingling Lin, Zhengren Huang

CAS - Shanghai Institute of Ceramics

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

55 Scopus citations

Abstract

Toughness as high as 9.5 MPa · m^1/2 was achieved in a SiC material prepared from aqueous tape casting, laminating and hot pressing. The increased toughness is related to the formation of second phase at triple pockets, YAlO₃, which was different from the composition of sintering additives Al₂O₃ and Y₂O₃ (Y₃Al₅O₁₂). The extra Al₂O ₃ was found at thin amorphous films covering most grain boundaries where Y₂O₃ was absent. A similar difference between the initial additive composition and the final second phase was found in another SiC material with lower toughness. It is proposed that the presence of thermal residual stress at second phase is responsible for the improvement in fracture toughness.

Original language	English
Pages (from-to)	381-385
Number of pages	5
Journal	Scripta Materialia
Volume	52
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2004.10.026
State	Published - Mar 2005
Externally published	Yes

Keywords

Silicon carbide
Tape casting
Toughness

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10.1016/j.scriptamat.2004.10.026

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title = "High toughness in laminated SiC ceramics from aqueous tape casting",

abstract = "Toughness as high as 9.5 MPa · m1/2 was achieved in a SiC material prepared from aqueous tape casting, laminating and hot pressing. The increased toughness is related to the formation of second phase at triple pockets, YAlO3, which was different from the composition of sintering additives Al2O3 and Y2O3 (Y3Al5O12). The extra Al2O 3 was found at thin amorphous films covering most grain boundaries where Y2O3 was absent. A similar difference between the initial additive composition and the final second phase was found in another SiC material with lower toughness. It is proposed that the presence of thermal residual stress at second phase is responsible for the improvement in fracture toughness.",

keywords = "Silicon carbide, Tape casting, Toughness",

author = "Jingxian Zhang and Rong Huang and Hui Gu and Dongliang Jiang and Qingling Lin and Zhengren Huang",

year = "2005",

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doi = "10.1016/j.scriptamat.2004.10.026",

language = "英语",

volume = "52",

pages = "381--385",

journal = "Scripta Materialia",

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TY - JOUR

T1 - High toughness in laminated SiC ceramics from aqueous tape casting

AU - Zhang, Jingxian

AU - Huang, Rong

AU - Gu, Hui

AU - Jiang, Dongliang

AU - Lin, Qingling

AU - Huang, Zhengren

PY - 2005/3

Y1 - 2005/3

N2 - Toughness as high as 9.5 MPa · m1/2 was achieved in a SiC material prepared from aqueous tape casting, laminating and hot pressing. The increased toughness is related to the formation of second phase at triple pockets, YAlO3, which was different from the composition of sintering additives Al2O3 and Y2O3 (Y3Al5O12). The extra Al2O 3 was found at thin amorphous films covering most grain boundaries where Y2O3 was absent. A similar difference between the initial additive composition and the final second phase was found in another SiC material with lower toughness. It is proposed that the presence of thermal residual stress at second phase is responsible for the improvement in fracture toughness.

AB - Toughness as high as 9.5 MPa · m1/2 was achieved in a SiC material prepared from aqueous tape casting, laminating and hot pressing. The increased toughness is related to the formation of second phase at triple pockets, YAlO3, which was different from the composition of sintering additives Al2O3 and Y2O3 (Y3Al5O12). The extra Al2O 3 was found at thin amorphous films covering most grain boundaries where Y2O3 was absent. A similar difference between the initial additive composition and the final second phase was found in another SiC material with lower toughness. It is proposed that the presence of thermal residual stress at second phase is responsible for the improvement in fracture toughness.

KW - Silicon carbide

KW - Tape casting

KW - Toughness

UR - https://www.scopus.com/pages/publications/10644245880

U2 - 10.1016/j.scriptamat.2004.10.026

DO - 10.1016/j.scriptamat.2004.10.026

M3 - 文章

AN - SCOPUS:10644245880

SN - 1359-6462

VL - 52

SP - 381

EP - 385

JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

High toughness in laminated SiC ceramics from aqueous tape casting

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Keywords

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