Mechanical and thermal properties of {beta}{prime}-sialon prepared by a slip casting method

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08784.x· OSTI ID:271681

Suzuki, Suguru; Nasu, Takakuni; Hayama, Seiji; Ozawa, Masakuni ^[1]

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1. Nagoya Inst. of Technology, Tajimi, Gifu (Japan). Ceramics Research Lab.

Various mechanical and thermal properties of {beta}{prime}-sialon ceramics, Si{sub 6{minus}z}Al{sub z}O{sub z}N{sub 8{minus}z}, prepared from aqueous slurries by a slip casting method were investigated as a function of Z values from 0 to 4. In the present study, Si{sub 6{minus}z}Al{sub z}O{sub z}N{sub 8{minus}z} occurred in the {beta}{prime}-sialon crystalline phase only near Z = 1. The maximum values for bending strength and fracture toughness, 660 MPa and 5.7 MPa{center_dot}m{sup 1/2}, respectively, were obtained at Z = 0.5. The thermal expansion coefficient exhibited its lowest value, 3.4 {times} 10{sup {minus}6}{center_dot}T{sup {minus}1}, at Z = 0.5. In view of the present results, {beta}{prime}-sialon, Si{sub 6{minus}z}Al{sub z}O{sub z}N{sub 8{minus}z} (Z = 0.5--1), prepared by a slip casting method using aqueous slurries could be adopted, with no problem, for refractor parts.

• Sponsoring Organization: USDOE
• OSTI ID: 271681
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 6 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BULK DENSITY
CHEMICAL COMPOSITION
FLEXURAL STRENGTH
FRACTURE PROPERTIES
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLDING
POWDERS
SCANNING ELECTRON MICROSCOPY
SILICON NITRIDES
SINTERING
SLIP CASTING
SLURRIES
THERMAL EXPANSION
X-RAY DIFFRACTION