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

H. Kiyono; T. Aketo; H. Watanuki; S. Shimada

doi:10.4028/www.scientific.net/kem.237.227

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

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

Research output: Contribution to journal › Conference article › peer-review

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 language	English
Pages (from-to)	227-232
Number of pages	6
Journal	Key Engineering Materials
Volume	237
DOIs	https://doi.org/10.4028/www.scientific.net/kem.237.227
Publication status	Published - 2003
Externally published	Yes
Event	Proceedings of the International Symposium on SiAlONs - Chiba, Japan Duration: 2001 Dec 2 → 2001 Dec 4

Keywords

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

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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Cite this

@article{ce00d93dfccf443499c6471c7b1f2f70,

title = "Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C",

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.",

keywords = "Nucleation Limiting-Rate, Oxidation, Powder, Water Vapor, Y-α-SiAlON",

author = "H. Kiyono and T. Aketo and H. Watanuki and S. Shimada",

year = "2003",

doi = "10.4028/www.scientific.net/kem.237.227",

language = "English",

volume = "237",

pages = "227--232",

journal = "Key Engineering Materials",

issn = "1013-9826",

publisher = "Trans Tech Publications",

}

TY - JOUR

T1 - Dry and wet oxidation of Y-α-SiAlON powder at 1000°-1300°C

AU - Kiyono, H.

AU - Aketo, T.

AU - Watanuki, H.

AU - Shimada, S.

PY - 2003

Y1 - 2003

N2 - 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.

AB - 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.

KW - Nucleation Limiting-Rate

KW - Oxidation

KW - Powder

KW - Water Vapor

KW - Y-α-SiAlON

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UR - http://www.scopus.com/inward/citedby.url?scp=0037272252&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/kem.237.227

DO - 10.4028/www.scientific.net/kem.237.227

M3 - Conference article

AN - SCOPUS:0037272252

SN - 1013-9826

VL - 237

SP - 227

EP - 232

JO - Key Engineering Materials

JF - Key Engineering Materials

T2 - Proceedings of the International Symposium on SiAlONs

Y2 - 2 December 2001 through 4 December 2001

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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