Effect of sintering temperature on microstructure and mechanical properties of highly porous silicon nitride ceramics produced by freeze casting

Feng Ye; Jingyi Zhang; Haijiao Zhang; Limeng Liu

doi:10.1016/j.msea.2010.07.038

Effect of sintering temperature on microstructure and mechanical properties of highly porous silicon nitride ceramics produced by freeze casting

Feng Ye^*
, Jingyi Zhang
, Haijiao Zhang
, Limeng Liu

^*Corresponding author for this work

Harbin Institute of Technology

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

21 Scopus citations

Abstract

Highly porous Si₃N₄ with macroscopically aligned pores were prepared by the unidirectional freeze casting process using liquid N₂ as refrigerant. The increased sintering temperature had no obvious influence on the porosity, but significantly promoted α→β-Si₃N₄ phase transformation and the growth of fibrous β-Si₃N₄ grains, and changed the pore structure. The flexural strength and fracture toughness of the sample sintered at 1900°C could reach 73MPa and 1.1MPam^1/2, respectively.

Original language	English
Pages (from-to)	6501-6504
Number of pages	4
Journal	Materials Science and Engineering: A
Volume	527
Issue number	24-25
DOIs	https://doi.org/10.1016/j.msea.2010.07.038
State	Published - Sep 2010
Externally published	Yes

Keywords

Freeze casting
Mechanical properties
Microstructure
Porous SiN

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10.1016/j.msea.2010.07.038

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title = "Effect of sintering temperature on microstructure and mechanical properties of highly porous silicon nitride ceramics produced by freeze casting",

abstract = "Highly porous Si3N4 with macroscopically aligned pores were prepared by the unidirectional freeze casting process using liquid N2 as refrigerant. The increased sintering temperature had no obvious influence on the porosity, but significantly promoted α→β-Si3N4 phase transformation and the growth of fibrous β-Si3N4 grains, and changed the pore structure. The flexural strength and fracture toughness of the sample sintered at 1900°C could reach 73MPa and 1.1MPam1/2, respectively.",

keywords = "Freeze casting, Mechanical properties, Microstructure, Porous SiN",

author = "Feng Ye and Jingyi Zhang and Haijiao Zhang and Limeng Liu",

year = "2010",

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doi = "10.1016/j.msea.2010.07.038",

language = "英语",

volume = "527",

pages = "6501--6504",

journal = "Materials Science and Engineering: A",

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T1 - Effect of sintering temperature on microstructure and mechanical properties of highly porous silicon nitride ceramics produced by freeze casting

AU - Ye, Feng

AU - Zhang, Jingyi

AU - Zhang, Haijiao

AU - Liu, Limeng

PY - 2010/9

Y1 - 2010/9

N2 - Highly porous Si3N4 with macroscopically aligned pores were prepared by the unidirectional freeze casting process using liquid N2 as refrigerant. The increased sintering temperature had no obvious influence on the porosity, but significantly promoted α→β-Si3N4 phase transformation and the growth of fibrous β-Si3N4 grains, and changed the pore structure. The flexural strength and fracture toughness of the sample sintered at 1900°C could reach 73MPa and 1.1MPam1/2, respectively.

AB - Highly porous Si3N4 with macroscopically aligned pores were prepared by the unidirectional freeze casting process using liquid N2 as refrigerant. The increased sintering temperature had no obvious influence on the porosity, but significantly promoted α→β-Si3N4 phase transformation and the growth of fibrous β-Si3N4 grains, and changed the pore structure. The flexural strength and fracture toughness of the sample sintered at 1900°C could reach 73MPa and 1.1MPam1/2, respectively.

KW - Freeze casting

KW - Mechanical properties

KW - Microstructure

KW - Porous SiN

UR - https://www.scopus.com/pages/publications/77955921836

U2 - 10.1016/j.msea.2010.07.038

DO - 10.1016/j.msea.2010.07.038

M3 - 文章

AN - SCOPUS:77955921836

SN - 0921-5093

VL - 527

SP - 6501

EP - 6504

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 24-25

ER -

Effect of sintering temperature on microstructure and mechanical properties of highly porous silicon nitride ceramics produced by freeze casting

Abstract

Keywords

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