Coating of fine-grained silicon nitride whiskers on fiber-like silicon nitride

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08168.x· OSTI ID:211727

Kawai, Chihiro; Yamakawa, Akira ^[1]

---

1. Sumitomo Electric Industries, Ltd., Itami, Hyogo (Japan). Itami Research Labs.

Fine-grained silicon nitride (Si{sub 3}N{sub 4}) whiskers were coated on Si{sub 3}N{sub 4} fibers through a vapor-liquid-solid mechanism under the following process. After the oxide glass of a Si-Al-Y-O system was coated on seed Si{sub 3}N{sub 4} fibers, the coated fibers were heated at 1,490 C and 700 torr in the vapor of the Si-N system which was generated by decomposition of amorphous Si{sub 3}N{sub 4}. The resulting specimens looked just like rose twigs. The Si{sub 3}N{sub 4} whiskers were precipitated by nucleation in a liquid phase generated by melting of the oxide glass layers on the Si{sub 3}N{sub 4} fibers.

• Sponsoring Organization: USDOE
• OSTI ID: 211727
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 2 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
AMORPHOUS STATE
COMPOSITE MATERIALS
FABRICATION
GLASS
LIQUIDS
NUCLEATION
PRECIPITATION
SCANNING ELECTRON MICROSCOPY
SILICON NITRIDES
SILICON OXIDES
SOLIDS
SURFACE COATING
VAPORS
YTTRIUM OXIDES