Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C

Hajime Kiyono, T. Aketo, H. Watanuki, S. Shimada

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Oxidation of Y-α-sialon powder was investigated in and Ar/O2 (dry) and Ar/O2/H2O (wet) atmospheres at the temperature range 1000° ∼ 1300°C. Oxidation products were identified by X-ray powder diffraction, 29Si magic angle spinning nuclear magnetic resonance and transmission electron microscope. The weight change by isothermal oxidation was followed by thermogravimetry. Oxidation product was composed of mullite, y-Y2Si2O7 and amorphous SiO2 in both atmospheres. Amorphous SiO2 is crystallized to cristobalite at 1300°C in the wet atmosphere. The weight changes were represented by the first order reaction equation. The rate constants for oxidation were greater 4 ∼ 10 times in the wet atmosphere than in the dry atmosphere.

Original languageEnglish
Pages (from-to)227-232
Number of pages6
JournalKey Engineering Materials
Volume237
Publication statusPublished - 2003
Externally publishedYes

Fingerprint

Powders
Oxidation
Magic angle spinning
Mullite
Silicon Dioxide
X ray powder diffraction
Thermogravimetric analysis
Rate constants
Electron microscopes
Nuclear magnetic resonance
Temperature

Keywords

  • Nucleation Limiting-Rate
  • Oxidation
  • Powder
  • Water Vapor
  • Y-α-SiAlON

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

Cite this

Kiyono, H., Aketo, T., Watanuki, H., & Shimada, S. (2003). Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C. Key Engineering Materials, 237, 227-232.

Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C. / Kiyono, Hajime; Aketo, T.; Watanuki, H.; Shimada, S.

In: Key Engineering Materials, Vol. 237, 2003, p. 227-232.

Research output: Contribution to journalArticle

Kiyono, H, Aketo, T, Watanuki, H & Shimada, S 2003, 'Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C', Key Engineering Materials, vol. 237, pp. 227-232.
Kiyono, Hajime ; Aketo, T. ; Watanuki, H. ; Shimada, S. / Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C. In: Key Engineering Materials. 2003 ; Vol. 237. pp. 227-232.
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