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Surface morphology and fracture strength analysis of nanosecond ablated alumina

Ribas Gomes, D., Hallmann, S., Daniel, C., Fredel, M. C. & Janssen, R., 1-Mar-2015, In : Journal of the Ceramic Society of Japan. 123, 1435, p. 160-166 7 p.

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  • Surface morphology and fracture strength analysis

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DOI

Although the research on laser ablation advances steadily, mainly on ultra-short pulses (in the order of pico- and femtoseconds), research on the low-cost and low-power-consuming nanosecond regime (>100 ns) is relatively scarce. This process is still difficult to predict, due to the many simultaneous and interacting physical processes that take place in a relatively short time. This study provides an experimental analysis for a ytterbium pulsed fibre-laser on Al2O3, by evaluating surface morphology and fracture strength for two sets of parameters. A very well-defined difference in removal rate and resulting surface topographies was observed, suggesting a threshold point between distinct ablation mechanisms. Laser machining also caused a clear increase on the Weibull modulus, while reducing the characteristic stress.
Original languageEnglish
Pages (from-to)160-166
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume123
Issue number1435
Publication statusPublished - 1-Mar-2015
Externally publishedYes

    Keywords

  • LASER-ABLATION, PROCESS PARAMETERS, CERAMICS, TOUGHNESS, PULSES, MODEL

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