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1.
The action of a laser on an aluminium target
Višnja Henč-Bartolič, Tonica Bončina, Suzana Jakovljević, Davor Pipić, Franc Zupanič, 2008, original scientific article

Abstract: A nitrogen laser beam (337 nm, 6 ns (FWHM), (3.2 [plus minus] 0.2) mJ) was focused with a quartz lens (f = 100 mm) onto an aluminium target in air at normal pressure. The laser irradiation and plasma explosion caused a modification to the Al surface and the deposition of a thin film (droplets) onto a glassy carbon plate. The irradiated target and the deposited material were studied with a scanning electron microscope (SEM) and a focused-ion-beam (FIB) device. A crater surrounded by a rim was produced on the spot of maximum irradiation on the aluminium target. The crater, very deep in comparison to its width and thickness, was presumably caused by the Kelvin-Helmholtz and the Rayleigh-Taylor instabilities. The temperatures of the electron and the massive particles were explained.
Keywords: aluminium, laser ablation, thin film deposition, instabilities, temperatures
Published: 23.03.2017; Views: 608; Downloads: 69
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2.
Površina zlitine Cu-Sn-Zn-Pb po obsevanju z ultravijoličnim dušikovim laserjem
Franc Zupanič, Tonica Bončina, Davor Pipić, Višnja Henč-Bartolič, 2007, original scientific article

Abstract: Površino zlitine Cu-Sn-Zn-Pb smo obsevali z laserskimi impulzi dušikovega laserja (valovna dolžina 337 nm). Pri tem sta se spremenila tako topografija površine kot tudi mikrostruktura pod njo. Ker je s klasičnimi metalografskimi metodami zelo težko primerno pripraviti obsevano površino za mikroskopsko opazovanje, smo kot temeljno orodje za metalografsko preiskavo uporabili fokusirani ionski curek (FIB), kajti FIB lahko odstranjuje material na specifičnih mestih v mikro- in nanoobmočju in odkrije mikrostrukturo brez prejšnje metalografske priprave. To nam je omogočilo, da smo raziskali vpliv obsevanja z laserjem na spremembo oblike površine, ugotovili profil kraterjev ter mikrostrukturne spremembe v območju toplotnega vpliva.
Keywords: laserska ablacija, bakrova zlitina, fokusiran ionski curek, mikrostruktura, topografija površine
Published: 10.07.2015; Views: 805; Downloads: 88
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