期刊
OPTICS AND LASERS IN ENGINEERING
卷 124, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2019.105811
关键词
High repetition rate; Micro-hole drilling; Metals; Picosecond ultra-short pulse laser
类别
资金
- Key Project of Equipment Pre-research Field Fund in China [61409230310]
- Fund of State Key Laboratory for Manufacturing Systems Engineering [sklms2019003]
- National Key Research and Development Program of China [2018YFB1703202]
High repetition rate can produce high laser ablation efficiency. However, there is the issue of shortened pulses interval in the case of high repetition rate. Moreover, both the ejecting time of the ablated materials and the cooling time of the substrate material have been decreased, due to the high repetition rate. These all make some significant influences on micro-hole drilling using ultra-short pulse laser. In this paper, the effect of the repetition rate, on the dimension and morphology of micro- shallow and deep holes, has been systematically studied in metals ablated by picosecond ultra-short pulse laser. The relationship between the repetition rate and micro-hole dimensions, such as diameter and depth, is described. Most importantly, the effect of the repetition rate on micro-hole surface and side-wall morphology is presented for the first time. The possible influencing mechanisms are discussed.
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