Synthesis of silicon nitride whiskers by microwave heating

S. Gedevanishvili, K. Cherian, D. Agrawal, R. Roy

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Whiskers of silicon nitride were synthesized by heating silicon powder compacts, silicon single crystal and polycrystalline silicon in microwave in the presence of flowing forming gas or nitrogen. Various gas compositions and form of silicon used resulted in different whisker morphologies. Silicon powder as starting material leads to the formation of needle-like whiskers while silicon single crystal and polycrystalline silicon led to the formation of wool-like and web-like structures respectively. Length of the whiskers apparently depends on the holding time at the optimum temperature approx. 1350°C; whiskers up to 250 micrometers in length may be grown in 30 minutes. Microstructural data suggest that the silicon nitride whiskers form through gas-solid reaction and vapor-solid mechanism.

Original languageEnglish (US)
Pages (from-to)413-417
Number of pages5
JournalMaterials Research Society Symposium - Proceedings
Volume547
StatePublished - Jan 1 1999
EventProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' - Boston, MA, USA
Duration: Nov 30 1998Dec 3 1998

Fingerprint

Microwave heating
Silicon
Silicon nitride
silicon nitrides
microwaves
heating
silicon
synthesis
Gases
Polysilicon
Powders
Single crystals
Crystal whiskers
Wool
Needles
wool
single crystals
gas composition
Nitrogen
Vapors

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Gedevanishvili, S., Cherian, K., Agrawal, D., & Roy, R. (1999). Synthesis of silicon nitride whiskers by microwave heating. Materials Research Society Symposium - Proceedings, 547, 413-417.
Gedevanishvili, S. ; Cherian, K. ; Agrawal, D. ; Roy, R. / Synthesis of silicon nitride whiskers by microwave heating. In: Materials Research Society Symposium - Proceedings. 1999 ; Vol. 547. pp. 413-417.
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Gedevanishvili, S, Cherian, K, Agrawal, D & Roy, R 1999, 'Synthesis of silicon nitride whiskers by microwave heating', Materials Research Society Symposium - Proceedings, vol. 547, pp. 413-417.

Synthesis of silicon nitride whiskers by microwave heating. / Gedevanishvili, S.; Cherian, K.; Agrawal, D.; Roy, R.

In: Materials Research Society Symposium - Proceedings, Vol. 547, 01.01.1999, p. 413-417.

Research output: Contribution to journalConference article

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T1 - Synthesis of silicon nitride whiskers by microwave heating

AU - Gedevanishvili, S.

AU - Cherian, K.

AU - Agrawal, D.

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AB - Whiskers of silicon nitride were synthesized by heating silicon powder compacts, silicon single crystal and polycrystalline silicon in microwave in the presence of flowing forming gas or nitrogen. Various gas compositions and form of silicon used resulted in different whisker morphologies. Silicon powder as starting material leads to the formation of needle-like whiskers while silicon single crystal and polycrystalline silicon led to the formation of wool-like and web-like structures respectively. Length of the whiskers apparently depends on the holding time at the optimum temperature approx. 1350°C; whiskers up to 250 micrometers in length may be grown in 30 minutes. Microstructural data suggest that the silicon nitride whiskers form through gas-solid reaction and vapor-solid mechanism.

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Gedevanishvili S, Cherian K, Agrawal D, Roy R. Synthesis of silicon nitride whiskers by microwave heating. Materials Research Society Symposium - Proceedings. 1999 Jan 1;547:413-417.