High-temperature oxidation of Y 2O 3-doped Al 2O 3 matrix composites dispersed with nano-Ni particles

Makoto Nanko, Daisuke Maruoka, Yoku Sato

研究成果: Article査読

4 被引用数 (Scopus)

抄録

The oxidation kinetics of Y 2O 3-doped Al 2O 3-based composites dispersed with 5 vol% nano-Ni particles was investigated at temperatures ranging from 1200° to 1350°C in air. The oxidized zone consisted of Al 2O 3 matrix and NiAl 2O 4, which was an oxidation product and a thin surface NiAl 2O 4 layer. The growth of the oxidized zone followed a parabolic manner, which means that mass transport in the oxidized zone was the rate-controlling process. Doping of Y 2O 3 into Al 2O 3 matrix decreases growth rate of the oxidized zone. The value of the apparent activation energy was 681 kJ/mol, which was larger than that of nondoped Ni/Al 2O 3 composites.

本文言語English
ページ(範囲)172-177
ページ数6
ジャーナルInternational Journal of Applied Ceramic Technology
9
1
DOI
出版ステータスPublished - 2012 1 1
外部発表はい

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Marketing
  • Materials Chemistry

フィンガープリント 「High-temperature oxidation of Y <sub>2</sub>O <sub>3</sub>-doped Al <sub>2</sub>O <sub>3</sub> matrix composites dispersed with nano-Ni particles」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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