Processing of a novel multilayered silicon nitride

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08959.x· OSTI ID:382471

Shigegaki, Yasuhiro ^[1]; Brito, M E; Hirao, Kiyoshi; Toriyama, Motohiro; Kanzaki, Shuzo ^[2]

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1. Fine Ceramics Research Association, Nagoya (Japan). Synergy Ceramics Lab.
2. National Industrial Research Inst. of Nagoya (Japan)

A new type of silicon nitride with a layered structure of alternating dense and porous layers was obtained by addition of {beta}-Si{sub 3}N{sub 4} whiskers to the porous layers. The materials consisted of dense layers 60 {micro}m thick and porous layers 40 {micro}m thick with a final porosity of about 30%. Highly anisotropic shrinkage behavior was observed during sintering. A large addition of whiskers to the porous layers resulted in layers with well-oriented and tightly tangled elongated grains, where porosity is represented by anisotropic shaped pores.

• Sponsoring Organization: USDOE
• OSTI ID: 382471
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 8 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
ANISOTROPY
BULK DENSITY
COMPOSITE MATERIALS
FABRICATION
LAYERS
POROSITY
POWDERS
SCANNING ELECTRON MICROSCOPY
SHRINKAGE
SILICON NITRIDES
SINTERING
WHISKERS
YTTRIUM OXIDES