Study on self-toughening Si3N4 ceramics

Guonian Ni; Xiangcheng Luo; Zhenbo Zhao; Xiaodong Yu

Study on self-toughening Si₃N₄ ceramics

Guonian Ni^*, Xiangcheng Luo, Zhenbo Zhao, Xiaodong Yu

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

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

Abstract

The relation between the process parameters such as amount of addition, sintering temperature and time of hot-pressed self-toughening Si ₃N₄ ceramics and the microstructure, phase structure as well as mechanical properties was studied. It was found that less amount of addition would be beneficial to microstructure homogenization which relates to better mechanical properties when the densification is well-achieved. On the other hand, due amount of addition and sintering temperature are necessary to the densification of materials and full phase transformation of α-Si ₃N₄ into β-Si₃N₃. The fracture toughness of 9.04MPa-m^1/2 was got with the addition w(Y ₂O₃) +w(Al₂0₃) = 3.5% + 1.5%.

Original language	English
Pages (from-to)	380-384
Number of pages	5
Journal	Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
Volume	16
Issue number	4
Publication status	Published - 1996

Keywords

Microstructure
Process parameters
Self-toughening
SiN ceramics

Cite this

Ni, G., Luo, X., Zhao, Z., & Yu, X. (1996). Study on self-toughening Si₃N₄ ceramics. Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology, 16(4), 380-384.

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abstract = "The relation between the process parameters such as amount of addition, sintering temperature and time of hot-pressed self-toughening Si 3N4 ceramics and the microstructure, phase structure as well as mechanical properties was studied. It was found that less amount of addition would be beneficial to microstructure homogenization which relates to better mechanical properties when the densification is well-achieved. On the other hand, due amount of addition and sintering temperature are necessary to the densification of materials and full phase transformation of α-Si 3N4 into β-Si3N3. The fracture toughness of 9.04MPa-m1/2 was got with the addition w(Y 2O3) +w(Al203) = 3.5% + 1.5%.",

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T1 - Study on self-toughening Si3N4 ceramics

AU - Ni, Guonian

AU - Luo, Xiangcheng

AU - Zhao, Zhenbo

AU - Yu, Xiaodong

PY - 1996

Y1 - 1996

N2 - The relation between the process parameters such as amount of addition, sintering temperature and time of hot-pressed self-toughening Si 3N4 ceramics and the microstructure, phase structure as well as mechanical properties was studied. It was found that less amount of addition would be beneficial to microstructure homogenization which relates to better mechanical properties when the densification is well-achieved. On the other hand, due amount of addition and sintering temperature are necessary to the densification of materials and full phase transformation of α-Si 3N4 into β-Si3N3. The fracture toughness of 9.04MPa-m1/2 was got with the addition w(Y 2O3) +w(Al203) = 3.5% + 1.5%.

AB - The relation between the process parameters such as amount of addition, sintering temperature and time of hot-pressed self-toughening Si 3N4 ceramics and the microstructure, phase structure as well as mechanical properties was studied. It was found that less amount of addition would be beneficial to microstructure homogenization which relates to better mechanical properties when the densification is well-achieved. On the other hand, due amount of addition and sintering temperature are necessary to the densification of materials and full phase transformation of α-Si 3N4 into β-Si3N3. The fracture toughness of 9.04MPa-m1/2 was got with the addition w(Y 2O3) +w(Al203) = 3.5% + 1.5%.

KW - Microstructure

KW - Process parameters

KW - Self-toughening

KW - SiN ceramics

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Study on self-toughening Si₃N₄ ceramics

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Keywords

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