Please use this identifier to cite or link to this item:
Title: Effect of atomic ordering on hydrogen dissociation on Ni₃Fe surfaces
Authors: Cheng, X. Y.
Chung, Yip-Wah
Zhao, Bo
Hong, B.
Liu, C. T.
Subjects: Desorption
Iron alloys
Nickel alloys
Surface chemistry
Issue Date: 16-Mar-2009
Publisher: American Institute of Physics
Source: Applied physics letters, 16 Mar. 2009, v. 94, no. 11, 111902, p. 1-3.
Abstract: The dissociation of molecular to atomic hydrogen on clean surfaces of Ni₃Fe with either an ordered or disordered structure has been directly investigated by thermal desorption studies. Results show that when exposed to an ordered Ni₃Fe surface, molecular hydrogen dissociates to produce atomic hydrogen, which desorbs from the surface around 350 K. On the other hand, hydrogen does not dissociate on a disordered Ni₃Fe surface. These results indicate that atomic ordering has a marked effect on surface chemical reactivity. Furthermore, our study provides a mechanistic basis to explain the hydrogen-induced embrittlement in ordered Ni₃Fe but not in disordered Ni₃Fe.
Rights: © 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in X.Y. Cheng et al., Appl. Phys. Lett. 94, 111902 (2009) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.3089575
ISSN: 0003-6951 (print)
1077-3118 (online)
Appears in Collections:ME Journal/Magazine Articles

Files in This Item:
File Description SizeFormat 
ApplPhysLett_94_111902.pdf346.19 kBAdobe PDFView/Open

All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.