Microstructure and fracture behavior of β-Si3N4 based nanoceramics

Ching Huan Lee; Horng Hwa Lu; Chang An Wang; Wen Tse Lo; Pramoda K. Nayak; Jow Lay Huang

doi:10.1016/j.ceramint.2010.10.009

Microstructure and fracture behavior of β-Si₃N₄ based nanoceramics

Ching Huan Lee, Horng Hwa Lu, Chang An Wang, Wen Tse Lo, Pramoda K. Nayak, Jow Lay Huang

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

21 Citations (Scopus)

Abstract

Fully dense β-Si₃N₄ based nanoceramics were consolidated by spark plasma sintering (SPS). A commercially available β-Si₃N₄ nano-powder was used as starting material. The sintering bulks were fabricated with a heating rate of 90 °C/min by varying SPS temperature from 1550 °C to 1700 °C, and the linear shrinkage was used to evaluate the sintering behavior of the nano-powder. The microstructures of the developed Si₃N₄ based ceramics were achieved, and the grain length, grain width, and aspect ratio for these sintering bulks were found to increase gradually with elevating sintering temperature. The hardness and fracture toughness are associated with the microstructural characteristics. The crack propagation and fracture behavior for these β-Si₃N₄ based nanoceramics have been observed for the specimens sintered at different sintering temperatures. Crack deflection is found to be one of the toughening mechanisms for these β-Si ₃N₄ based nanoceramics.

Original language	English
Pages (from-to)	641-645
Number of pages	5
Journal	Ceramics International
Volume	37
Issue number	2
DOIs	https://doi.org/10.1016/j.ceramint.2010.10.009
Publication status	Published - 2011 Mar

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.ceramint.2010.10.009

Cite this

@article{47c73d6c7b24423882446ab85fd1d673,

title = "Microstructure and fracture behavior of β-Si3N4 based nanoceramics",

abstract = "Fully dense β-Si3N4 based nanoceramics were consolidated by spark plasma sintering (SPS). A commercially available β-Si3N4 nano-powder was used as starting material. The sintering bulks were fabricated with a heating rate of 90 °C/min by varying SPS temperature from 1550 °C to 1700 °C, and the linear shrinkage was used to evaluate the sintering behavior of the nano-powder. The microstructures of the developed Si3N4 based ceramics were achieved, and the grain length, grain width, and aspect ratio for these sintering bulks were found to increase gradually with elevating sintering temperature. The hardness and fracture toughness are associated with the microstructural characteristics. The crack propagation and fracture behavior for these β-Si3N4 based nanoceramics have been observed for the specimens sintered at different sintering temperatures. Crack deflection is found to be one of the toughening mechanisms for these β-Si 3N4 based nanoceramics.",

author = "Lee, {Ching Huan} and Lu, {Horng Hwa} and Wang, {Chang An} and Lo, {Wen Tse} and Nayak, {Pramoda K.} and Huang, {Jow Lay}",

year = "2011",

month = mar,

doi = "10.1016/j.ceramint.2010.10.009",

language = "English",

volume = "37",

pages = "641--645",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Limited",

number = "2",

}

TY - JOUR

T1 - Microstructure and fracture behavior of β-Si3N4 based nanoceramics

AU - Lee, Ching Huan

AU - Lu, Horng Hwa

AU - Wang, Chang An

AU - Lo, Wen Tse

AU - Nayak, Pramoda K.

AU - Huang, Jow Lay

PY - 2011/3

Y1 - 2011/3

N2 - Fully dense β-Si3N4 based nanoceramics were consolidated by spark plasma sintering (SPS). A commercially available β-Si3N4 nano-powder was used as starting material. The sintering bulks were fabricated with a heating rate of 90 °C/min by varying SPS temperature from 1550 °C to 1700 °C, and the linear shrinkage was used to evaluate the sintering behavior of the nano-powder. The microstructures of the developed Si3N4 based ceramics were achieved, and the grain length, grain width, and aspect ratio for these sintering bulks were found to increase gradually with elevating sintering temperature. The hardness and fracture toughness are associated with the microstructural characteristics. The crack propagation and fracture behavior for these β-Si3N4 based nanoceramics have been observed for the specimens sintered at different sintering temperatures. Crack deflection is found to be one of the toughening mechanisms for these β-Si 3N4 based nanoceramics.

AB - Fully dense β-Si3N4 based nanoceramics were consolidated by spark plasma sintering (SPS). A commercially available β-Si3N4 nano-powder was used as starting material. The sintering bulks were fabricated with a heating rate of 90 °C/min by varying SPS temperature from 1550 °C to 1700 °C, and the linear shrinkage was used to evaluate the sintering behavior of the nano-powder. The microstructures of the developed Si3N4 based ceramics were achieved, and the grain length, grain width, and aspect ratio for these sintering bulks were found to increase gradually with elevating sintering temperature. The hardness and fracture toughness are associated with the microstructural characteristics. The crack propagation and fracture behavior for these β-Si3N4 based nanoceramics have been observed for the specimens sintered at different sintering temperatures. Crack deflection is found to be one of the toughening mechanisms for these β-Si 3N4 based nanoceramics.

UR - http://www.scopus.com/inward/record.url?scp=78650209699&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78650209699&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2010.10.009

DO - 10.1016/j.ceramint.2010.10.009

M3 - Article

AN - SCOPUS:78650209699

SN - 0272-8842

VL - 37

SP - 641

EP - 645

JO - Ceramics International

JF - Ceramics International

IS - 2

ER -

Microstructure and fracture behavior of β-Si₃N₄ based nanoceramics

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this