Microstructural characterization of silicon nitride ceramics processed by pressureless sintering, overpressure sintering, and sinter HIP

K. R. Selkregg; K. L. More; S. G. Seshadri; C. H. McMurty

Microstructural characterization of silicon nitride ceramics processed by pressureless sintering, overpressure sintering, and sinter HIP

K. R. Selkregg, K. L. More, S. G. Seshadri, C. H. McMurty

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

Abstract

Silicon nitride ceramics of the same nominal sialon composition have been sintered under different conditions including atmospheric sintering, overpressure sintering, reaction-bonded (nitrided pressureless sinter), and sinter/HIP cycles. The sintered ceramics, which exhibited dramatic differences in fracture toughness, have been characterized by X-ray diffraction, scanning electron microscopy, analytical transmission electron microscopy, and image analysis techniques. Fracture toughness data have been correlated to the microstructural and chemical analysis of the grain-boundary phases. The microstructure was the strongest influecing factor on the observed fracture-toughness difference.

Original language	English
Pages (from-to)	603-615
Number of pages	13
Journal	Ceramic Engineering and Science Proceedings
Volume	11
Issue number	7 -8 pt 1
State	Published - Jul 1990
Externally published	Yes
Event	Fourteenth Annual Conference on Composites and Advanced Ceramic Materials - Cocoa Beach, FL, USA Duration: Jan 14 1990 → Jan 17 1990

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@article{36037ee50adf4a7e847c1822c1e1be99,

title = "Microstructural characterization of silicon nitride ceramics processed by pressureless sintering, overpressure sintering, and sinter HIP",

abstract = "Silicon nitride ceramics of the same nominal sialon composition have been sintered under different conditions including atmospheric sintering, overpressure sintering, reaction-bonded (nitrided pressureless sinter), and sinter/HIP cycles. The sintered ceramics, which exhibited dramatic differences in fracture toughness, have been characterized by X-ray diffraction, scanning electron microscopy, analytical transmission electron microscopy, and image analysis techniques. Fracture toughness data have been correlated to the microstructural and chemical analysis of the grain-boundary phases. The microstructure was the strongest influecing factor on the observed fracture-toughness difference.",

author = "Selkregg, {K. R.} and More, {K. L.} and Seshadri, {S. G.} and McMurty, {C. H.}",

year = "1990",

month = jul,

language = "English",

volume = "11",

pages = "603--615",

journal = "Ceramic Engineering and Science Proceedings",

issn = "0196-6219",

number = "7 -8 pt 1",

note = "Fourteenth Annual Conference on Composites and Advanced Ceramic Materials ; Conference date: 14-01-1990 Through 17-01-1990",

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TY - JOUR

T1 - Microstructural characterization of silicon nitride ceramics processed by pressureless sintering, overpressure sintering, and sinter HIP

AU - Selkregg, K. R.

AU - More, K. L.

AU - Seshadri, S. G.

AU - McMurty, C. H.

PY - 1990/7

Y1 - 1990/7

N2 - Silicon nitride ceramics of the same nominal sialon composition have been sintered under different conditions including atmospheric sintering, overpressure sintering, reaction-bonded (nitrided pressureless sinter), and sinter/HIP cycles. The sintered ceramics, which exhibited dramatic differences in fracture toughness, have been characterized by X-ray diffraction, scanning electron microscopy, analytical transmission electron microscopy, and image analysis techniques. Fracture toughness data have been correlated to the microstructural and chemical analysis of the grain-boundary phases. The microstructure was the strongest influecing factor on the observed fracture-toughness difference.

AB - Silicon nitride ceramics of the same nominal sialon composition have been sintered under different conditions including atmospheric sintering, overpressure sintering, reaction-bonded (nitrided pressureless sinter), and sinter/HIP cycles. The sintered ceramics, which exhibited dramatic differences in fracture toughness, have been characterized by X-ray diffraction, scanning electron microscopy, analytical transmission electron microscopy, and image analysis techniques. Fracture toughness data have been correlated to the microstructural and chemical analysis of the grain-boundary phases. The microstructure was the strongest influecing factor on the observed fracture-toughness difference.

UR - http://www.scopus.com/inward/record.url?scp=0025461805&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0025461805

SN - 0196-6219

VL - 11

SP - 603

EP - 615

JO - Ceramic Engineering and Science Proceedings

JF - Ceramic Engineering and Science Proceedings

IS - 7 -8 pt 1

T2 - Fourteenth Annual Conference on Composites and Advanced Ceramic Materials

Y2 - 14 January 1990 through 17 January 1990

ER -

Microstructural characterization of silicon nitride ceramics processed by pressureless sintering, overpressure sintering, and sinter HIP

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