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Physical chemistry of the femtosecond and nanosecond laser-material-interaction with SiC and a SiC-TiC-TiB2 composite ceramic compound

  • The interaction of nanosecond laser pulses in the ultraviolet wavelength range and femtosecond laser pulses in the near-infrared region with the direct semiconductor SiC and the composite compound SiC-TiC-TiB2 was investigated in respect to resulting physicochemical processes. Surface analytical techniques, such as XPS, µ-Raman, and EDX were used to identify the chemical changes between untreated and laser-treated areas. Single-pulse irradiation led to material modifications in the condensed state in most instances. Multi-pulse results differed depending on the pulse duration. In the nanosecond case, melting of the surface and redeposited material (debris) were observed. With femtosecond pulses instead, only negligible melting and few debris could be detected. Additionally, periodic structures (ripples) appeared, with parallel orientation and in most cases two different periodicities for a particular material. Laser ablation of all the studied compound materials exhibited preferentialThe interaction of nanosecond laser pulses in the ultraviolet wavelength range and femtosecond laser pulses in the near-infrared region with the direct semiconductor SiC and the composite compound SiC-TiC-TiB2 was investigated in respect to resulting physicochemical processes. Surface analytical techniques, such as XPS, µ-Raman, and EDX were used to identify the chemical changes between untreated and laser-treated areas. Single-pulse irradiation led to material modifications in the condensed state in most instances. Multi-pulse results differed depending on the pulse duration. In the nanosecond case, melting of the surface and redeposited material (debris) were observed. With femtosecond pulses instead, only negligible melting and few debris could be detected. Additionally, periodic structures (ripples) appeared, with parallel orientation and in most cases two different periodicities for a particular material. Laser ablation of all the studied compound materials exhibited preferential ablation of the lighter component elements. Crystal structure changes of the irradiated surface were observed as a consequence of laser-induced melting and resolidification. An oxidation process interfered with all this processes so that unstoichiometric oxides were formed.zeige mehrzeige weniger

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Metadaten
Autor*innen:Wolfgang Kautek, Pascale Rudolph, Klaus-Werner Brzezinka, Rolf WäscheORCiD
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
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