Ultrashort pulse laser interaction with anodic metal oxide layers in electrolyte contact
- The removal and accelerated corrosion monitoring of metal coating systems is of general interest in materials science
and engineering technology. The femtosecond and nanosecond laser ablation and delamination at 800 nm and 532 nm,
respectively, of anodic oxide layers on aluminium alloys in electrolyte contact were investigated. Laser-induced
modifications of the oxide layer resulted in an ionic contact between electrolyte and metal, which produced a current
transient and thus allowed the in-situ electrochemical monitoring of the modification. Oxide coatings with different
optical properties, almost transparent and opaque, were examined. The transparent anodic oxides showed contrasting
ablation mechanisms in the nanosecond and femtosecond pulse duration regime: nanosecond pulses caused spallation,
whereas femtosecond treatment led to ablation. Current signals measured in the transparent film were consistent with
light absorption below the metal-oxide interface and with film spallation.The removal and accelerated corrosion monitoring of metal coating systems is of general interest in materials science
and engineering technology. The femtosecond and nanosecond laser ablation and delamination at 800 nm and 532 nm,
respectively, of anodic oxide layers on aluminium alloys in electrolyte contact were investigated. Laser-induced
modifications of the oxide layer resulted in an ionic contact between electrolyte and metal, which produced a current
transient and thus allowed the in-situ electrochemical monitoring of the modification. Oxide coatings with different
optical properties, almost transparent and opaque, were examined. The transparent anodic oxides showed contrasting
ablation mechanisms in the nanosecond and femtosecond pulse duration regime: nanosecond pulses caused spallation,
whereas femtosecond treatment led to ablation. Current signals measured in the transparent film were consistent with
light absorption below the metal-oxide interface and with film spallation. Irradiation of the opaque coating yielded ionic
current transients within the so-called shock-affected-zone of the oxide layer. This investigation provided insight into the
role of the penetration depth of light and the heat-affected zone, the extent of the shock-affected zone, and the defect
formation in the coating and at the solid-solid interface between metal and oxide.…
Autor*innen: | Wolfgang Kautek, Grazia Daminelli-Widany, Jörg KrügerORCiD |
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Persönliche Herausgeber*innen: | M. Meunier |
Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Graue Literatur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Physics and chemistry of advanced laser materials processing |
Jahr der Erstveröffentlichung: | 2002 |
Herausgeber (Institution): | European Materials Research Society |
Verlag: | Elsevier |
Verlagsort: | Amsterdam |
Jahrgang/Band: | 208/209.2003,1 |
Ausgabe/Heft: | 1 |
Erste Seite: | 1(?) |
Veranstaltung: | Symposium D - European Materials Research Society |
Veranstaltungsort: | Strasbourg, France |
Beginndatum der Veranstaltung: | 2002-06-18 |
Enddatum der Veranstaltung: | 2002-06-21 |
URL: | http://www.emrs-strasbourg.com/files/pdf/2002_SPRING/02_Prog_Dv2.pdf |
Bemerkung: | Serientitel: Applied surface science – Series title: Applied surface science |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Nein |