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Proceedings Paper

Exploring the explosive ablation regime of metals in nanosecond micromachining
Author(s): Jennifer M. Fishburn; Richard P. Mildren; Daniel Kapitan; Michael J. Withford; Daniel J. W. Brown; James A. Piper
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Paper Abstract

We present results of single shot ablation experiments for a variety of metal samples (In, Al, Cu, Mo, W, Ti) using visible, nanosecond lasers at fluences up to approximately 104 J cm-2. At low fluences, usually less than 102 J cm-2, small amounts of material were removed and removal was approximately uniform across the ablation crater. As the fluence increased above approximately 102 J cm-2, substantially more material was removed and a conical pit developed in the center of the ablation crater. The appearance of these conical pits is consistent with material removed by phase explosion mechanisms. In this paper, this ablation phenomenon will be investigated by presenting the crater morphology as a function of fluence. Consequences for micromachining with visible, high repetition rate, nanosecond lasers will be discussed.

Paper Details

Date Published: 1 February 2000
PDF: 8 pages
Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); doi: 10.1117/12.376996
Show Author Affiliations
Jennifer M. Fishburn, Macquarie Univ. (Australia)
Richard P. Mildren, Macquarie Univ. (Australia)
Daniel Kapitan, Oxford Univ. (United Kingdom)
Michael J. Withford, Macquarie Univ. (Australia)
Daniel J. W. Brown, Macquarie Univ. (Australia)
James A. Piper, Macquarie Univ. (Australia)

Published in SPIE Proceedings Vol. 3885:
High-Power Laser Ablation II
Claude R. Phipps; Masayuki Niino, Editor(s)

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