Microstructure and mechanical properties of β'-Si3Al3O3N5 ceramics

E. Kokmeijer, G. With, de, R. Metselaar

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Abstract

The properties of 21 different ceramics of ß'-Si3Al3O3N5 were measured. The sialons were prepared by three methods: reaction sintering in a gas pressure sintering furnace, reaction hot-pressing and sintering of sialon powder produced by carbothermal reaction from kaolin. Furthermore, the series differed in kind (CeO2 or CaO) and concentration of additive and process conditions. The quantities measured were composition (X-ray diffraction), density, microstructure, Vickers hardness (2 N), Young's modulus, Poisson's ratio, fracture toughness (SEN B) and biaxial strength. Generally the room temperature properties were hardly influenced by the production route, composition or process conditions. Fracture toughness and bi-axial strength were most sensitive to the process conditions. The mechanical properties of kaolin-derived sialon appeared to be as good as those of the other sialons.
Original languageEnglish
Pages (from-to)71-80
Number of pages10
JournalJournal of the European Ceramic Society
Volume8
Issue number2
DOIs
Publication statusPublished - 1991

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Kaolin
Sintering
Mechanical properties
Microstructure
Fracture toughness
Vickers hardness
Poisson ratio
Hot pressing
Chemical analysis
Powders
Furnaces
Elastic moduli
Gases
X ray diffraction
Temperature

Cite this

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title = "Microstructure and mechanical properties of β'-Si3Al3O3N5 ceramics",
abstract = "The properties of 21 different ceramics of {\ss}'-Si3Al3O3N5 were measured. The sialons were prepared by three methods: reaction sintering in a gas pressure sintering furnace, reaction hot-pressing and sintering of sialon powder produced by carbothermal reaction from kaolin. Furthermore, the series differed in kind (CeO2 or CaO) and concentration of additive and process conditions. The quantities measured were composition (X-ray diffraction), density, microstructure, Vickers hardness (2 N), Young's modulus, Poisson's ratio, fracture toughness (SEN B) and biaxial strength. Generally the room temperature properties were hardly influenced by the production route, composition or process conditions. Fracture toughness and bi-axial strength were most sensitive to the process conditions. The mechanical properties of kaolin-derived sialon appeared to be as good as those of the other sialons.",
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Microstructure and mechanical properties of β'-Si3Al3O3N5 ceramics. / Kokmeijer, E.; With, de, G.; Metselaar, R.

In: Journal of the European Ceramic Society, Vol. 8, No. 2, 1991, p. 71-80.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Microstructure and mechanical properties of β'-Si3Al3O3N5 ceramics

AU - Kokmeijer, E.

AU - With, de, G.

AU - Metselaar, R.

PY - 1991

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N2 - The properties of 21 different ceramics of ß'-Si3Al3O3N5 were measured. The sialons were prepared by three methods: reaction sintering in a gas pressure sintering furnace, reaction hot-pressing and sintering of sialon powder produced by carbothermal reaction from kaolin. Furthermore, the series differed in kind (CeO2 or CaO) and concentration of additive and process conditions. The quantities measured were composition (X-ray diffraction), density, microstructure, Vickers hardness (2 N), Young's modulus, Poisson's ratio, fracture toughness (SEN B) and biaxial strength. Generally the room temperature properties were hardly influenced by the production route, composition or process conditions. Fracture toughness and bi-axial strength were most sensitive to the process conditions. The mechanical properties of kaolin-derived sialon appeared to be as good as those of the other sialons.

AB - The properties of 21 different ceramics of ß'-Si3Al3O3N5 were measured. The sialons were prepared by three methods: reaction sintering in a gas pressure sintering furnace, reaction hot-pressing and sintering of sialon powder produced by carbothermal reaction from kaolin. Furthermore, the series differed in kind (CeO2 or CaO) and concentration of additive and process conditions. The quantities measured were composition (X-ray diffraction), density, microstructure, Vickers hardness (2 N), Young's modulus, Poisson's ratio, fracture toughness (SEN B) and biaxial strength. Generally the room temperature properties were hardly influenced by the production route, composition or process conditions. Fracture toughness and bi-axial strength were most sensitive to the process conditions. The mechanical properties of kaolin-derived sialon appeared to be as good as those of the other sialons.

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