کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5369902 1388465 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Steady-state mechanism for polymer ablation by a free-running Er:YAG laser
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Steady-state mechanism for polymer ablation by a free-running Er:YAG laser
چکیده انگلیسی

A free-running Er:YAG laser is used to ablate polyethylene glycol and the ablation yield is studied as a function of molecular weight (1000-10,000 g/mol) and laser fluence (8-25 J/cm2). A steady-state ablation mechanism is proposed which includes recoil-induced expulsion as the primary contributor to the ablation yield. It is also proposed that the formation of a molten layer is a necessary part of the ablation mechanism because the calculated tensile strengths for the solid polymer are too large to permit fracture of the target due to the laser-induced stress transient. The ablation yield is found to depend in a sigmoidal fashion upon laser fluence, thus implying a variable ablation enthalpy. Finally, the current results are compared with that obtained previously with a free electron laser.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 5, 30 December 2006, Pages 2386-2392
نویسندگان
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