Study of the interplay of vaporisation, melt displacement and melt ejection mechanisms under single and multiple pulse irradiation

J. M. Fishburn, M. J. Withford, D. W. Coutts, J. A. Piper

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

We report the use of a combination of profilometry, high speed imaging and recoil measurements using a ballistic pendulum to calculate the amount of material removed due to mechanisms of vaporisation, melt displacement and melt ejection when ablating aluminium with a visible nanosecond laser. Single laser pulses are shown to induce material removal predominantly by the mechanism of melt displacement at fluences <2 J.cm-2, melt displacement and vapourisation at fluences between 2 and 7 J.cm-2, and melt ejection with smaller contributions due to melt displacement and vaporisation at fluences >7 J.cm-2. Studies of the effects of multiple laser pulses, as a function of spot size and pulse rate demonstrate the additional influence of the geometric constraints of the ablation crater and cumulative heating on laser ablation.

Original languageEnglish
Title of host publicationPICALO 2006 - 2nd Pacific International Conference on Applications of Laser and Optics, Conference Proceedings
EditorsMilan Brandt, Erol Harvey
Place of PublicationOrlando, FL
PublisherLaser Institute of America
Pages277-280
Number of pages4
ISBN (Print)0912035846, 9780912035840
Publication statusPublished - 2006
EventPICALO 2006 - 2nd Pacific International Conference on Applications of Laser and Optics - Melbourne, VIC, Australia
Duration: 3 Apr 20065 Apr 2006

Other

OtherPICALO 2006 - 2nd Pacific International Conference on Applications of Laser and Optics
CountryAustralia
CityMelbourne, VIC
Period3/04/065/04/06

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