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- W2897611441 abstract "Characterizations of debris and hole diameter in CO2 laser percussion drilling of alumina ceramic (4.4 mm thick) under various processing parameters were investigated. The main energetic parameters, including laser peak power, pulse frequency, pulse duty cycle, and piercing time, were selected as independent variables to be studied. The process qualities were evaluated in terms of the characteristics of debris, hole entrance and exit diameter. Based on the experimental results, it was found that laser peak power affected vaporization rate; pulse duty cycle influenced melt rate; pulse frequency affected valid heating efficiency in base material; and piercing time influenced drilled depth before beam break-through. On the process qualities (debris, entrance and exit diameter), laser peak power and duty cycle had significant effects, pulse frequency had a lower effect, while piercing time had the lowest effect. Comparatively, peak power had a higher effect than duty cycle on the formation of debris. Furthermore, higher pulse frequency could induce more symmetrical and smaller debris especially when the laser incidence angle was not zero and hence the melt ejected along a particular direction.Characterizations of debris and hole diameter in CO2 laser percussion drilling of alumina ceramic (4.4 mm thick) under various processing parameters were investigated. The main energetic parameters, including laser peak power, pulse frequency, pulse duty cycle, and piercing time, were selected as independent variables to be studied. The process qualities were evaluated in terms of the characteristics of debris, hole entrance and exit diameter. Based on the experimental results, it was found that laser peak power affected vaporization rate; pulse duty cycle influenced melt rate; pulse frequency affected valid heating efficiency in base material; and piercing time influenced drilled depth before beam break-through. On the process qualities (debris, entrance and exit diameter), laser peak power and duty cycle had significant effects, pulse frequency had a lower effect, while piercing time had the lowest effect. Comparatively, peak power had a higher effect than duty cycle on the formation of debris. Furtherm..." @default.
- W2897611441 created "2018-10-26" @default.
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- W2897611441 date "2009-01-01" @default.
- W2897611441 modified "2023-09-26" @default.
- W2897611441 title "Study on the characteristics of debris and hole diameter in laser drilling of thick alumina ceramics" @default.
- W2897611441 doi "https://doi.org/10.2351/1.5061636" @default.
- W2897611441 hasPublicationYear "2009" @default.
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