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Surface development of an aluminum brazing sheet during heating studied by XPEEM and XPS

Rullik, L LU ; Bertram, F LU ; Niu, Y R LU ; Evertsson, J LU ; Stenqvist, T; Zakharov, A A LU ; Mikkelsen, A LU and Lundgren, E LU (2016) In Materials Research Express 3(10).
Abstract
X-ray photoelectron emission microscopy (XPEEM) was used in combination with other microscopic and spectroscopic techniques to follow the surface development of an aluminum brazing sheet during heating. The studied aluminum alloy sheet is a composite material designed for vacuum brazing. Its surface is covered with a native aluminum oxide film. Changes in the chemical state of the alloying elements and the composition of the surface layer were detected during heating to the melting temperature. It was found that Mg segregates to the surface upon heating, and the measurements indicate the formation of magnesium aluminate. During the heating the aluminum oxide as well as the silicon is observed to disappear from the surface. Our measurements... (More)
X-ray photoelectron emission microscopy (XPEEM) was used in combination with other microscopic and spectroscopic techniques to follow the surface development of an aluminum brazing sheet during heating. The studied aluminum alloy sheet is a composite material designed for vacuum brazing. Its surface is covered with a native aluminum oxide film. Changes in the chemical state of the alloying elements and the composition of the surface layer were detected during heating to the melting temperature. It was found that Mg segregates to the surface upon heating, and the measurements indicate the formation of magnesium aluminate. During the heating the aluminum oxide as well as the silicon is observed to disappear from the surface. Our measurements is in agreement with previous studies observing a break-up of the oxide and the outflow of the braze cladding onto the surface, a process assisted by the Mg segregation and reaction with surface oxygen. This study also demonstrates how XPEEM can be utilized to study complex industrial materials. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Materials Research Express
volume
3
issue
10
external identifiers
  • scopus:84994430662
  • wos:000402900300001
DOI
10.1088/2053-1591/3/10/106506
language
English
LU publication?
yes
id
e46f50ed-c4a4-4208-990f-18d83af61988
date added to LUP
2016-11-19 22:05:24
date last changed
2017-09-18 11:30:50
@article{e46f50ed-c4a4-4208-990f-18d83af61988,
  abstract     = {X-ray photoelectron emission microscopy (XPEEM) was used in combination with other microscopic and spectroscopic techniques to follow the surface development of an aluminum brazing sheet during heating. The studied aluminum alloy sheet is a composite material designed for vacuum brazing. Its surface is covered with a native aluminum oxide film. Changes in the chemical state of the alloying elements and the composition of the surface layer were detected during heating to the melting temperature. It was found that Mg segregates to the surface upon heating, and the measurements indicate the formation of magnesium aluminate. During the heating the aluminum oxide as well as the silicon is observed to disappear from the surface. Our measurements is in agreement with previous studies observing a break-up of the oxide and the outflow of the braze cladding onto the surface, a process assisted by the Mg segregation and reaction with surface oxygen. This study also demonstrates how XPEEM can be utilized to study complex industrial materials.},
  articleno    = {106506},
  author       = {Rullik, L and Bertram, F and Niu, Y R and Evertsson, J and Stenqvist, T and Zakharov, A A and Mikkelsen, A and Lundgren, E},
  language     = {eng},
  number       = {10},
  series       = {Materials Research Express},
  title        = {Surface development of an aluminum brazing sheet during heating studied by XPEEM and XPS},
  url          = {http://dx.doi.org/10.1088/2053-1591/3/10/106506},
  volume       = {3},
  year         = {2016},
}