Effect of Si2N2O content on the microstructure, properties, and erosion of silicon nitride-Si2N2O in situ composites

Dong Soo Park, Hyun Ju Choi, Byung Dong Han, Hai Doo Kim, Dae-Soon Lim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Silicon nitride-Si2N2O in situ composites were prepared by hot pressing powder mixtures of α-Si3N4, 6 wt% Y2O3, 1 wt% Al2O3, and 0-12 wt% SiO2 X-ray diffraction (XRD) analysis indicated that the volume percents of Si2N2O, 13, 31, and 54 for the composites prepared with 0, 4, 8, and 12 wt% SiO2, respectively. XRD results also indicated that both silicon nitride grains and Si2N2O grains were laid down perpendicular to hot pressing direction. As the volume percent of Si2N2O increased, the width and the amount of elongated silicon nitride grains decreased, but the fracture toughness increased. Young's modulus of the in situ composites decreased as the Si2N2O content was increased. The erosion rate decreased as the Si2N2O content was increased, in part, due to both the increased fracture toughness and the reduced grain size. Erosion of the composites occurred primarily due to the grain dislodgment. The sample without Si2N2O experienced micro-chipping due to transgranular fracture.

Original languageEnglish
Pages (from-to)2275-2280
Number of pages6
JournalJournal of Materials Research
Volume17
Issue number9
Publication statusPublished - 2002 Sep 1
Externally publishedYes

Fingerprint

Silicon nitride
silicon nitrides
erosion
Erosion
microstructure
Microstructure
composite materials
hot pressing
Composite materials
Hot pressing
fracture strength
Fracture toughness
chipping
diffraction
Powders
X ray diffraction analysis
modulus of elasticity
x rays
Elastic moduli
grain size

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Effect of Si2N2O content on the microstructure, properties, and erosion of silicon nitride-Si2N2O in situ composites. / Park, Dong Soo; Choi, Hyun Ju; Han, Byung Dong; Kim, Hai Doo; Lim, Dae-Soon.

In: Journal of Materials Research, Vol. 17, No. 9, 01.09.2002, p. 2275-2280.

Research output: Contribution to journalArticle

Park, Dong Soo ; Choi, Hyun Ju ; Han, Byung Dong ; Kim, Hai Doo ; Lim, Dae-Soon. / Effect of Si2N2O content on the microstructure, properties, and erosion of silicon nitride-Si2N2O in situ composites. In: Journal of Materials Research. 2002 ; Vol. 17, No. 9. pp. 2275-2280.
@article{58c95c1188104ea6a9a0a3c61bab783a,
title = "Effect of Si2N2O content on the microstructure, properties, and erosion of silicon nitride-Si2N2O in situ composites",
abstract = "Silicon nitride-Si2N2O in situ composites were prepared by hot pressing powder mixtures of α-Si3N4, 6 wt{\%} Y2O3, 1 wt{\%} Al2O3, and 0-12 wt{\%} SiO2 X-ray diffraction (XRD) analysis indicated that the volume percents of Si2N2O, 13, 31, and 54 for the composites prepared with 0, 4, 8, and 12 wt{\%} SiO2, respectively. XRD results also indicated that both silicon nitride grains and Si2N2O grains were laid down perpendicular to hot pressing direction. As the volume percent of Si2N2O increased, the width and the amount of elongated silicon nitride grains decreased, but the fracture toughness increased. Young's modulus of the in situ composites decreased as the Si2N2O content was increased. The erosion rate decreased as the Si2N2O content was increased, in part, due to both the increased fracture toughness and the reduced grain size. Erosion of the composites occurred primarily due to the grain dislodgment. The sample without Si2N2O experienced micro-chipping due to transgranular fracture.",
author = "Park, {Dong Soo} and Choi, {Hyun Ju} and Han, {Byung Dong} and Kim, {Hai Doo} and Dae-Soon Lim",
year = "2002",
month = "9",
day = "1",
language = "English",
volume = "17",
pages = "2275--2280",
journal = "Journal of Materials Research",
issn = "0884-2914",
publisher = "Materials Research Society",
number = "9",

}

TY - JOUR

T1 - Effect of Si2N2O content on the microstructure, properties, and erosion of silicon nitride-Si2N2O in situ composites

AU - Park, Dong Soo

AU - Choi, Hyun Ju

AU - Han, Byung Dong

AU - Kim, Hai Doo

AU - Lim, Dae-Soon

PY - 2002/9/1

Y1 - 2002/9/1

N2 - Silicon nitride-Si2N2O in situ composites were prepared by hot pressing powder mixtures of α-Si3N4, 6 wt% Y2O3, 1 wt% Al2O3, and 0-12 wt% SiO2 X-ray diffraction (XRD) analysis indicated that the volume percents of Si2N2O, 13, 31, and 54 for the composites prepared with 0, 4, 8, and 12 wt% SiO2, respectively. XRD results also indicated that both silicon nitride grains and Si2N2O grains were laid down perpendicular to hot pressing direction. As the volume percent of Si2N2O increased, the width and the amount of elongated silicon nitride grains decreased, but the fracture toughness increased. Young's modulus of the in situ composites decreased as the Si2N2O content was increased. The erosion rate decreased as the Si2N2O content was increased, in part, due to both the increased fracture toughness and the reduced grain size. Erosion of the composites occurred primarily due to the grain dislodgment. The sample without Si2N2O experienced micro-chipping due to transgranular fracture.

AB - Silicon nitride-Si2N2O in situ composites were prepared by hot pressing powder mixtures of α-Si3N4, 6 wt% Y2O3, 1 wt% Al2O3, and 0-12 wt% SiO2 X-ray diffraction (XRD) analysis indicated that the volume percents of Si2N2O, 13, 31, and 54 for the composites prepared with 0, 4, 8, and 12 wt% SiO2, respectively. XRD results also indicated that both silicon nitride grains and Si2N2O grains were laid down perpendicular to hot pressing direction. As the volume percent of Si2N2O increased, the width and the amount of elongated silicon nitride grains decreased, but the fracture toughness increased. Young's modulus of the in situ composites decreased as the Si2N2O content was increased. The erosion rate decreased as the Si2N2O content was increased, in part, due to both the increased fracture toughness and the reduced grain size. Erosion of the composites occurred primarily due to the grain dislodgment. The sample without Si2N2O experienced micro-chipping due to transgranular fracture.

UR - http://www.scopus.com/inward/record.url?scp=0036709684&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036709684&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0036709684

VL - 17

SP - 2275

EP - 2280

JO - Journal of Materials Research

JF - Journal of Materials Research

SN - 0884-2914

IS - 9

ER -