Effect of Zr-content on the oxidation and phase transformation of Zr-base amorphous alloys in air

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

35 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1089-1096
Journal / PublicationIntermetallics
Volume12
Issue number10-11 SPEC. ISS.
Publication statusPublished - Oct 2004
Externally publishedYes

Abstract

The oxidation and phase transformation of three Zr-base amorphous alloys, Zr-20Cu-12Ni-10Al-5Ti (Zr53), Zr-30Cu-10Al-5Ni (Zr55), and Zr-15Cu-10Al-10Ni (Zr65), were studied over the temperature range of 300-500 °C in dry air. Oxidation kinetics of these alloys generally followed a parabolic rate law at T>350°C, but linear kinetics was obeyed at 300-350 °C. It was found that Zr65 was the most oxidation-resistant alloy among the three alloys studied. Scales formed on the alloys during oxidation consisted of mainly tetragonal- and monoclinic-ZrO2 (t- and m-ZrO2), and minor CuO and NiO (only detected in Zr53). The amount of m-ZrO2 formed strongly depends upon the alloy composition, exposure time, and temperature. TEM results showed that a significant amount of nano-grained Zr2Cu polycrystals formed beneath the amorphous oxide-scale in Zr53, indicating phase transformation has taken place. By contrast, Zr55 and Zr65 amorphous substrates transformed into Zr2Cu and ZrAl after oxidation. © 2004 Elsevier Ltd. All rights reserved.

Research Area(s)

  • B. Glasses, metallic, B. Oxidation, B. Phase transformation

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Effect of Zr-content on the oxidation and phase transformation of Zr-base amorphous alloys in air. / Hsieh, H. H.; Kai, W.; Huang, R. T.; Pan, M. X.; Nieh, T. G.

In: Intermetallics, Vol. 12, No. 10-11 SPEC. ISS., 10.2004, p. 1089-1096.

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