Effect of nano-Al2O3 and Y2O3 on the properties and microstructure of Si3N4

Haitao Gu; Han Chen; Lucun Guo

doi:10.1016/j.msea.2008.01.073

Effect of nano-Al₂O₃ and Y₂O₃ on the properties and microstructure of Si₃N₄

Haitao Gu, Han Chen, Lucun Guo

材料科学与工程学院

Nanjing Tech University

科研成果: 期刊稿件 › 文章 › 同行评审

9 引用（Scopus）

摘要

Nano-Al₂O₃ and Y₂O₃ had a significant effect on the microstructural evolution and mechanical properties of Si₃N₄. With the addition of nano-Al₂O₃, large elongated grains were developed and the grain boundary phase decreased. Besides, the proportion of intergranular fracture increased for nano-Al₂O₃-doped Si₃N₄. The highest fracture toughness of nano-Al₂O₃-doped Si₃N₄ was 9.5 MPa m^1/2 (7.2 MPa m^1/2 for submicro- Al₂O₃-doped Si₃N₄). The increase in mechanical properties might be ascribed to the formation of large elongated grains, the reduction of secondary phases and the "pullout" of elongated grains.

源语言	英语
页（从-至）	177-181
页数	5
期刊	Materials Science and Engineering: A
卷	491
期	1-2
DOI	https://doi.org/10.1016/j.msea.2008.01.073
出版状态	已出版 - 15 9月 2008

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abstract = "Nano-Al2O3 and Y2O3 had a significant effect on the microstructural evolution and mechanical properties of Si3N4. With the addition of nano-Al2O3, large elongated grains were developed and the grain boundary phase decreased. Besides, the proportion of intergranular fracture increased for nano-Al2O3-doped Si3N4. The highest fracture toughness of nano-Al2O3-doped Si3N4 was 9.5 MPa m1/2 (7.2 MPa m1/2 for submicro- Al2O3-doped Si3N4). The increase in mechanical properties might be ascribed to the formation of large elongated grains, the reduction of secondary phases and the {"}pullout{"} of elongated grains.",

keywords = "Mechanical properties, Nitrides, Sintering, X-ray diffraction",

author = "Haitao Gu and Han Chen and Lucun Guo",

year = "2008",

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doi = "10.1016/j.msea.2008.01.073",

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T1 - Effect of nano-Al2O3 and Y2O3 on the properties and microstructure of Si3N4

AU - Gu, Haitao

AU - Chen, Han

AU - Guo, Lucun

PY - 2008/9/15

Y1 - 2008/9/15

N2 - Nano-Al2O3 and Y2O3 had a significant effect on the microstructural evolution and mechanical properties of Si3N4. With the addition of nano-Al2O3, large elongated grains were developed and the grain boundary phase decreased. Besides, the proportion of intergranular fracture increased for nano-Al2O3-doped Si3N4. The highest fracture toughness of nano-Al2O3-doped Si3N4 was 9.5 MPa m1/2 (7.2 MPa m1/2 for submicro- Al2O3-doped Si3N4). The increase in mechanical properties might be ascribed to the formation of large elongated grains, the reduction of secondary phases and the "pullout" of elongated grains.

AB - Nano-Al2O3 and Y2O3 had a significant effect on the microstructural evolution and mechanical properties of Si3N4. With the addition of nano-Al2O3, large elongated grains were developed and the grain boundary phase decreased. Besides, the proportion of intergranular fracture increased for nano-Al2O3-doped Si3N4. The highest fracture toughness of nano-Al2O3-doped Si3N4 was 9.5 MPa m1/2 (7.2 MPa m1/2 for submicro- Al2O3-doped Si3N4). The increase in mechanical properties might be ascribed to the formation of large elongated grains, the reduction of secondary phases and the "pullout" of elongated grains.

KW - Mechanical properties

KW - Nitrides

KW - Sintering

KW - X-ray diffraction

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U2 - 10.1016/j.msea.2008.01.073

DO - 10.1016/j.msea.2008.01.073

M3 - 文章

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SN - 0921-5093

VL - 491

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EP - 181

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2

ER -

Effect of nano-Al2O3 and Y2O3 on the properties and microstructure of Si3N4

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Effect of nano-Al₂O₃ and Y₂O₃ on the properties and microstructure of Si₃N₄