Mechanical properties and mechanism of damage tolerance for Ti3SiC2

Shibo Li; Jianxin Xie; Junqing Zhao; Litong Zhang

doi:10.1016/S0167-577X(02)00716-4

Mechanical properties and mechanism of damage tolerance for Ti₃SiC₂

Shibo Li, Jianxin Xie, Junqing Zhao, Litong Zhang

School of Materials Sience and Engineering

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

39 Scopus citations

Abstract

The dense ceramic Ti₃SiC₂ was fabricated by hot-pressing of TiH₂, Si and C powders. The new layered material Ti₃SiC₂ possesses some unique properties such as low hardness, damage tolerance, and high fracture toughness and flexural strength at room temperature. The flexural strength and fracture toughness of Ti₃SiC₂, which were measured by three-point bending test, were 427 MPa and 7.20 MPa m^1/2, respectively. The mechanisms of this material with the high fracture toughness and strength are discussed based on the observation of microstructure. This layered material has a low hardness of about 4 GPa. The features are observed by scanning electron microscopy (SEM) around hardness indentations suggesting that Ti₃SiC₂ is a damage-tolerant material able to contain the extent of microdamage at room temperature. The damage tolerance should be due to the multi-absorbing energy mechanisms: grain pull out, grain deformation, delamination, crack deflection and grain buckling.

Original language	English
Pages (from-to)	119-123
Number of pages	5
Journal	Materials Letters
Volume	57
Issue number	1
DOIs	https://doi.org/10.1016/S0167-577X(02)00716-4
State	Published - Nov 2002

Keywords

Damage tolerance
Flexural strength
Fracture toughness
Mechanisms
TiSiC ceramics

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10.1016/S0167-577X(02)00716-4

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title = "Mechanical properties and mechanism of damage tolerance for Ti3SiC2",

abstract = "The dense ceramic Ti3SiC2 was fabricated by hot-pressing of TiH2, Si and C powders. The new layered material Ti3SiC2 possesses some unique properties such as low hardness, damage tolerance, and high fracture toughness and flexural strength at room temperature. The flexural strength and fracture toughness of Ti3SiC2, which were measured by three-point bending test, were 427 MPa and 7.20 MPa m1/2, respectively. The mechanisms of this material with the high fracture toughness and strength are discussed based on the observation of microstructure. This layered material has a low hardness of about 4 GPa. The features are observed by scanning electron microscopy (SEM) around hardness indentations suggesting that Ti3SiC2 is a damage-tolerant material able to contain the extent of microdamage at room temperature. The damage tolerance should be due to the multi-absorbing energy mechanisms: grain pull out, grain deformation, delamination, crack deflection and grain buckling.",

keywords = "Damage tolerance, Flexural strength, Fracture toughness, Mechanisms, TiSiC ceramics",

author = "Shibo Li and Jianxin Xie and Junqing Zhao and Litong Zhang",

year = "2002",

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doi = "10.1016/S0167-577X(02)00716-4",

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T1 - Mechanical properties and mechanism of damage tolerance for Ti3SiC2

AU - Li, Shibo

AU - Xie, Jianxin

AU - Zhao, Junqing

AU - Zhang, Litong

PY - 2002/11

Y1 - 2002/11

N2 - The dense ceramic Ti3SiC2 was fabricated by hot-pressing of TiH2, Si and C powders. The new layered material Ti3SiC2 possesses some unique properties such as low hardness, damage tolerance, and high fracture toughness and flexural strength at room temperature. The flexural strength and fracture toughness of Ti3SiC2, which were measured by three-point bending test, were 427 MPa and 7.20 MPa m1/2, respectively. The mechanisms of this material with the high fracture toughness and strength are discussed based on the observation of microstructure. This layered material has a low hardness of about 4 GPa. The features are observed by scanning electron microscopy (SEM) around hardness indentations suggesting that Ti3SiC2 is a damage-tolerant material able to contain the extent of microdamage at room temperature. The damage tolerance should be due to the multi-absorbing energy mechanisms: grain pull out, grain deformation, delamination, crack deflection and grain buckling.

AB - The dense ceramic Ti3SiC2 was fabricated by hot-pressing of TiH2, Si and C powders. The new layered material Ti3SiC2 possesses some unique properties such as low hardness, damage tolerance, and high fracture toughness and flexural strength at room temperature. The flexural strength and fracture toughness of Ti3SiC2, which were measured by three-point bending test, were 427 MPa and 7.20 MPa m1/2, respectively. The mechanisms of this material with the high fracture toughness and strength are discussed based on the observation of microstructure. This layered material has a low hardness of about 4 GPa. The features are observed by scanning electron microscopy (SEM) around hardness indentations suggesting that Ti3SiC2 is a damage-tolerant material able to contain the extent of microdamage at room temperature. The damage tolerance should be due to the multi-absorbing energy mechanisms: grain pull out, grain deformation, delamination, crack deflection and grain buckling.

KW - Damage tolerance

KW - Flexural strength

KW - Fracture toughness

KW - Mechanisms

KW - TiSiC ceramics

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DO - 10.1016/S0167-577X(02)00716-4

M3 - 文章

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SN - 0167-577X

VL - 57

SP - 119

EP - 123

JO - Materials Letters

JF - Materials Letters

IS - 1

ER -

Mechanical properties and mechanism of damage tolerance for Ti₃SiC₂

Abstract

Keywords

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