Citation

SIEW, W and TOU, T and WONG, K (2005) Shadowgraphy of pulsed CO laser ablation of polymers. Applied Surface Science, 248 (1-4). pp. 281-285. ISSN 01694332

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Abstract

Heavy plume expansions in air, helium and argon produced by pulsed CO2 laser ablations of poly(methyl methacrylate) (PMMA) and polyimide (PI) were imaged by shadowgraphy. The PMMA was melted at 1-2 mm depth beneath the surface followed by an outward expulsion of heavy plumes. A shock front was formed which detached from the first plume after several microseconds. A second, mushroom-shaped plume and a narrow ejection were also observed. In contrast, the mushroorn-shaped plume structure was absent in PI ablation, but it was in the form of a single blob, which collapsed back to the target. (c) 2005 Elsevier B.V. All rights reserved.

Item Type:	Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	12 Sep 2011 02:47
Last Modified:	12 Sep 2011 02:47
URII:	http://shdl.mmu.edu.my/id/eprint/2201

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