Oxidation behavior of Ru–Al multilayer coatings

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

5 Scopus Citations
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Author(s)

  • Yung-I Chen
  • Zhi-Ting Zheng
  • Wu Kai
  • Yu-Ren Huang

Detail(s)

Original languageEnglish
Pages (from-to)1-7
Journal / PublicationApplied Surface Science
Volume406
Online published14 Feb 2017
Publication statusPublished - 1 Jun 2017
Externally publishedYes

Abstract

Ru0.63Al0.37 coatings were deposited through a cyclical gradient concentration deposition at 400 °C with a substrate-holder rotation speed of 1 rpm by direct current magnetron cosputtering. Scanning electron microscopy revealed that the as-deposited coatings exhibited a multilayer structure along with the columnar structure. The oxidation behavior of the Ru0.63Al0.37 coatings was examined through X-ray diffraction, Auger electron spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. Oxidation kinetics was measured using a thermogravimetric analyzer. Internal oxidation was observed for Ru0.63Al0.37 coatings annealed in a 1% O2–99% Ar atmosphere at 400–600 °C accompanied with activation energies of 72–84 kJ/mol. By contrast, external oxidation was observed after annealing at 700–800 °C, resulting in the formation of a continuous alumina scale consisting of crystalline δ-Al2O3 domains, which can be attributable to the outward diffusion of Al.

Research Area(s)

  • Auger electron spectroscopy, Kinetics, Multilayer coatings, Nanostructure, Oxidation, X-ray photoelectron spectroscopy

Citation Format(s)

Oxidation behavior of Ru–Al multilayer coatings. / Chen, Yung-I; Zheng, Zhi-Ting; Kai, Wu; Huang, Yu-Ren.

In: Applied Surface Science, Vol. 406, 01.06.2017, p. 1-7.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal