Effects of thermal annealing of thin Au film on Fe40Ni38Mo4B18

S. K. Sharma; V. Zaporojtchenko; J. Zekonyte; S. Deki; F. Faupel

doi:10.1016/S0921-5093(02)00838-9

Effects of thermal annealing of thin Au film on Fe₄₀Ni₃₈Mo₄B₁₈

S. K. Sharma, V. Zaporojtchenko, J. Zekonyte, S. Deki, F. Faupel^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Thin films (∼20 nm) of Au were vapour-deposited at room temperature on melt-spun amorphous ribbon specimens of the alloy Fe₄₀ Ni₃₈ Mo₄B₁₈ . The specimens were subsequently annealed at 823 and 873 K in a flowing nitrogen atmosphere and in low vacuum conditions (∼10^-1-10^-3 mbar) in order to observe any dispersion of Au in the alloy matrix. The depth profiles of Au from annealed specimens were obtained by XPS and showed depth distribution of Au up to several hundred nanometres in the alloy in sharp contrast to those obtained from specimens annealed in ultra-high vacuum. An analysis of the XPS peaks of the alloy constituents suggests strong surface segregation of the matrix elements and the growth of an oxide film on the surface during thermal annealing. It is suggested that the driving force for Au dispersion in the alloy is provided by the reactivity of matrix elements with oxygen present in the annealing media.

Original language	English
Pages (from-to)	316-324
Number of pages	9
Journal	Materials Science and Engineering A
Volume	351
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5093(02)00838-9
Publication status	Published - 25 Jun 2003

Keywords

Amorphous alloys
Dispersion
Oxidation
Surface segregation
Thermal annealing
XPS

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10.1016/S0921-5093(02)00838-9

Cite this

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title = "Effects of thermal annealing of thin Au film on Fe40Ni38Mo4B18",

abstract = "Thin films (∼20 nm) of Au were vapour-deposited at room temperature on melt-spun amorphous ribbon specimens of the alloy Fe40 Ni38 Mo4B18 . The specimens were subsequently annealed at 823 and 873 K in a flowing nitrogen atmosphere and in low vacuum conditions (∼10-1-10-3 mbar) in order to observe any dispersion of Au in the alloy matrix. The depth profiles of Au from annealed specimens were obtained by XPS and showed depth distribution of Au up to several hundred nanometres in the alloy in sharp contrast to those obtained from specimens annealed in ultra-high vacuum. An analysis of the XPS peaks of the alloy constituents suggests strong surface segregation of the matrix elements and the growth of an oxide film on the surface during thermal annealing. It is suggested that the driving force for Au dispersion in the alloy is provided by the reactivity of matrix elements with oxygen present in the annealing media.",

keywords = "Amorphous alloys, Dispersion, Oxidation, Surface segregation, Thermal annealing, XPS",

author = "Sharma, {S. K.} and V. Zaporojtchenko and J. Zekonyte and S. Deki and F. Faupel",

year = "2003",

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TY - JOUR

T1 - Effects of thermal annealing of thin Au film on Fe40Ni38Mo4B18

AU - Sharma, S. K.

AU - Zaporojtchenko, V.

AU - Zekonyte, J.

AU - Deki, S.

AU - Faupel, F.

PY - 2003/6/25

Y1 - 2003/6/25

N2 - Thin films (∼20 nm) of Au were vapour-deposited at room temperature on melt-spun amorphous ribbon specimens of the alloy Fe40 Ni38 Mo4B18 . The specimens were subsequently annealed at 823 and 873 K in a flowing nitrogen atmosphere and in low vacuum conditions (∼10-1-10-3 mbar) in order to observe any dispersion of Au in the alloy matrix. The depth profiles of Au from annealed specimens were obtained by XPS and showed depth distribution of Au up to several hundred nanometres in the alloy in sharp contrast to those obtained from specimens annealed in ultra-high vacuum. An analysis of the XPS peaks of the alloy constituents suggests strong surface segregation of the matrix elements and the growth of an oxide film on the surface during thermal annealing. It is suggested that the driving force for Au dispersion in the alloy is provided by the reactivity of matrix elements with oxygen present in the annealing media.

AB - Thin films (∼20 nm) of Au were vapour-deposited at room temperature on melt-spun amorphous ribbon specimens of the alloy Fe40 Ni38 Mo4B18 . The specimens were subsequently annealed at 823 and 873 K in a flowing nitrogen atmosphere and in low vacuum conditions (∼10-1-10-3 mbar) in order to observe any dispersion of Au in the alloy matrix. The depth profiles of Au from annealed specimens were obtained by XPS and showed depth distribution of Au up to several hundred nanometres in the alloy in sharp contrast to those obtained from specimens annealed in ultra-high vacuum. An analysis of the XPS peaks of the alloy constituents suggests strong surface segregation of the matrix elements and the growth of an oxide film on the surface during thermal annealing. It is suggested that the driving force for Au dispersion in the alloy is provided by the reactivity of matrix elements with oxygen present in the annealing media.

KW - Amorphous alloys

KW - Dispersion

KW - Oxidation

KW - Surface segregation

KW - Thermal annealing

KW - XPS

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