Air-oxidation of a Pd40Ni40P20 bulk glassy alloy at 250-420 ºC

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

1 Scopus Citations
View graph of relations

Author(s)

  • W. Kai
  • Y.H. Wu
  • I.F. Jen
  • T.H. Ho
  • H.H. Hsieh

Detail(s)

Original languageEnglish
Pages (from-to)S24-S30
Journal / PublicationJournal of Alloys and Compounds
Volume586
Issue numberSUPPL. 1
Early online date16 Feb 2013
Publication statusPublished - 15 Feb 2014
Externally publishedYes

Abstract

The oxidation behavior of a Pd40Ni40P20 bulk-metallic glass (Pd3-BMG) was studied over the temperature range of 250-420 ºC in dry air. The Pd3-BMG revealed nearly no oxidation at T < 300 °C, while its oxidation kinetics followed a multiple-stage parabolic-rate law at T ≥ 300 °C, with its oxidation rates increasing with temperature. In general, the oxidation rate constants (kp values) of Pd3-BMG are slightly higher than those of the crystalline counterpart and polycrystalline pure Ni at 300-420 °C, indicating that the amorphous alloy exhibited a poor oxidation resistance. An exclusive layer of NiO scale formed on the alloy surface and a Pd-enriched layer was also observed beneath the scale. In addition, the amorphous substrate transferred into two crystalline phases of Pd3P and Ni3P after the oxidation at T ≥ 300 °C, indicative of the occurrence of phase transformation.

Research Area(s)

  • Oxidation, Pd40Ni40P20 bulk-metallic glass, NiO, Pd3P, Ni3P

Citation Format(s)

Air-oxidation of a Pd40Ni40P20 bulk glassy alloy at 250-420 ºC. / Kai, W.; Wu, Y.H.; Jen, I.F.; Ho, T.H.; Hsieh, H.H.

In: Journal of Alloys and Compounds, Vol. 586, No. SUPPL. 1, 15.02.2014, p. S24-S30.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review