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Sealing performance of thin amorphous carbon films formed by ion beam assisted deposition at low temperature for protection of aluminium against aggressive media : the influence of the ion energy

Ringleben, Jens von ; Sundermann, Christoph ; Matsutani, Toshihin ; Kiuchi, Masati ; Ensinger, Wolfgang :
Sealing performance of thin amorphous carbon films formed by ion beam assisted deposition at low temperature for protection of aluminium against aggressive media : the influence of the ion energy.
In: Thin solid films, 482 (1-2) pp. 115-119.
[Artikel], (2005)

Kurzbeschreibung (Abstract)

Thin films of amorphous carbon (a-C) are well known for their low intrinsic microporosity. Being stable against aqueous media, they can be used for sealing metals against aggressive wet environment. Such a metal is aluminum. Its main advantage is its low weight at a comparatively high strength. Its disadvantages are its poor tribological features and its susceptibility to pitting corrosion. a-C films are very suitable for handling this problem. However, for some of the aluminium alloys the coating process temperature has to be kept low (<150 °C) in order to avoid detrimental structural changes. Such low process temperatures can be maintained when ion beam techniques are applied. Ion beam assisted deposition (IBAD) has been used to deposit a-C films on aluminium by electron beam evaporation of graphite under concurrent argon ion beam irradiation at room temperature. The sealing properties and microporosity of the films in chloride-containing water were examined by electrochemical polarization techniques. The results show that a-C films can effectively improve the corrosion performance when appropriate deposition process conditions are used. An increase in film thickness and in ion energy leads to a reduction in corrosion.

Typ des Eintrags: Artikel
Erschienen: 2005
Autor(en): Ringleben, Jens von ; Sundermann, Christoph ; Matsutani, Toshihin ; Kiuchi, Masati ; Ensinger, Wolfgang
Titel: Sealing performance of thin amorphous carbon films formed by ion beam assisted deposition at low temperature for protection of aluminium against aggressive media : the influence of the ion energy
Sprache: Englisch
Kurzbeschreibung (Abstract):

Thin films of amorphous carbon (a-C) are well known for their low intrinsic microporosity. Being stable against aqueous media, they can be used for sealing metals against aggressive wet environment. Such a metal is aluminum. Its main advantage is its low weight at a comparatively high strength. Its disadvantages are its poor tribological features and its susceptibility to pitting corrosion. a-C films are very suitable for handling this problem. However, for some of the aluminium alloys the coating process temperature has to be kept low (<150 °C) in order to avoid detrimental structural changes. Such low process temperatures can be maintained when ion beam techniques are applied. Ion beam assisted deposition (IBAD) has been used to deposit a-C films on aluminium by electron beam evaporation of graphite under concurrent argon ion beam irradiation at room temperature. The sealing properties and microporosity of the films in chloride-containing water were examined by electrochemical polarization techniques. The results show that a-C films can effectively improve the corrosion performance when appropriate deposition process conditions are used. An increase in film thickness and in ion energy leads to a reduction in corrosion.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Thin solid films
Band: 482
(Heft-)Nummer: 1-2
Verlag: Elsevier
Freie Schlagworte: Ion beam assisted deposition. Carbon coating, Amorphous carbon, Aluminum, Corrosion protection, Pitting corrosion
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Materialanalytik
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 20 Nov 2008 08:22
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