Influence of the crack area on the crack-healing performance of silicon carbide whisker reinforced silicon nitride composite

Jun Feng Hu; Ming Yue Qiu; Xi Deng; Teng Zhou Xu; Zhou Chen

doi:10.1166/mex.2019.1521

Influence of the crack area on the crack-healing performance of silicon carbide whisker reinforced silicon nitride composite

Jun Feng Hu, Ming Yue Qiu, Xi Deng, Teng Zhou Xu, Zhou Chen

School of Mechanical and Power Engineering

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

3 Scopus citations

Abstract

Delivered by Ingenta The crack healing properties of Si₃ N₄ composite ceramic reinforced by SiC whiskers (Si₃ N₄ /SiC_w) was studied. Six kinds of pre-cracks were introduced on the center of the tensile side of the specimens, and the relationship between the crack area and crack healing properties was studied. The results show that the healing effect of strength recovery is similar with that of smooth specimens for pre-cracked specimens with crack depth less than 60 μm. As for the propagated crack and the central through crack, the strength recovery rapidly decreases due to the increase of crack depth. It could be concluded that it is difficult to heal pre-cracked specimens with the crack depth over 90 μm. The main reason is considered to be that the melted glass phase blocked in the surface, and prevented the oxidation reaction in the inner of crack.

Original language	English
Pages (from-to)	429-436
Number of pages	8
Journal	Materials Express
Volume	9
Issue number	5
DOIs	https://doi.org/10.1166/mex.2019.1521
State	Published - Aug 2019

Keywords

Central through crack
Crack area
Crack-Healing
Oxidation Reaction
Propagated crack

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10.1166/mex.2019.1521

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title = "Influence of the crack area on the crack-healing performance of silicon carbide whisker reinforced silicon nitride composite",

abstract = "Delivered by Ingenta The crack healing properties of Si3 N4 composite ceramic reinforced by SiC whiskers (Si3 N4 /SiCw) was studied. Six kinds of pre-cracks were introduced on the center of the tensile side of the specimens, and the relationship between the crack area and crack healing properties was studied. The results show that the healing effect of strength recovery is similar with that of smooth specimens for pre-cracked specimens with crack depth less than 60 μm. As for the propagated crack and the central through crack, the strength recovery rapidly decreases due to the increase of crack depth. It could be concluded that it is difficult to heal pre-cracked specimens with the crack depth over 90 μm. The main reason is considered to be that the melted glass phase blocked in the surface, and prevented the oxidation reaction in the inner of crack.",

keywords = "Central through crack, Crack area, Crack-Healing, Oxidation Reaction, Propagated crack",

author = "Hu, {Jun Feng} and Qiu, {Ming Yue} and Xi Deng and Xu, {Teng Zhou} and Zhou Chen",

note = "Publisher Copyright: {\textcopyright} 2019 by American Scientific Publishers.",

year = "2019",

month = aug,

doi = "10.1166/mex.2019.1521",

language = "英语",

volume = "9",

pages = "429--436",

journal = "Materials Express",

issn = "2158-5849",

publisher = "American Scientific Publishers",

number = "5",

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TY - JOUR

T1 - Influence of the crack area on the crack-healing performance of silicon carbide whisker reinforced silicon nitride composite

AU - Hu, Jun Feng

AU - Qiu, Ming Yue

AU - Deng, Xi

AU - Xu, Teng Zhou

AU - Chen, Zhou

PY - 2019/8

Y1 - 2019/8

N2 - Delivered by Ingenta The crack healing properties of Si3 N4 composite ceramic reinforced by SiC whiskers (Si3 N4 /SiCw) was studied. Six kinds of pre-cracks were introduced on the center of the tensile side of the specimens, and the relationship between the crack area and crack healing properties was studied. The results show that the healing effect of strength recovery is similar with that of smooth specimens for pre-cracked specimens with crack depth less than 60 μm. As for the propagated crack and the central through crack, the strength recovery rapidly decreases due to the increase of crack depth. It could be concluded that it is difficult to heal pre-cracked specimens with the crack depth over 90 μm. The main reason is considered to be that the melted glass phase blocked in the surface, and prevented the oxidation reaction in the inner of crack.

AB - Delivered by Ingenta The crack healing properties of Si3 N4 composite ceramic reinforced by SiC whiskers (Si3 N4 /SiCw) was studied. Six kinds of pre-cracks were introduced on the center of the tensile side of the specimens, and the relationship between the crack area and crack healing properties was studied. The results show that the healing effect of strength recovery is similar with that of smooth specimens for pre-cracked specimens with crack depth less than 60 μm. As for the propagated crack and the central through crack, the strength recovery rapidly decreases due to the increase of crack depth. It could be concluded that it is difficult to heal pre-cracked specimens with the crack depth over 90 μm. The main reason is considered to be that the melted glass phase blocked in the surface, and prevented the oxidation reaction in the inner of crack.

KW - Central through crack

KW - Crack area

KW - Crack-Healing

KW - Oxidation Reaction

KW - Propagated crack

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U2 - 10.1166/mex.2019.1521

DO - 10.1166/mex.2019.1521

M3 - 文章

AN - SCOPUS:85073364798

SN - 2158-5849

VL - 9

SP - 429

EP - 436

JO - Materials Express

JF - Materials Express

IS - 5

ER -

Influence of the crack area on the crack-healing performance of silicon carbide whisker reinforced silicon nitride composite

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Keywords

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