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1 April 2019 Laser micro-processing of ceramic glasses by ultra-short laser pulses
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The microstructure of a lithium aluminosilicate (LAS) glass ceramic has been modified by ultra-short pulsed laser radiation during the crystallization process. Laser pulses with 10 ps pulse duration, 1064 nm wavelength and a repetition rate of 50 kHz have been focused inside LAS glass ceramic using a microscope objective with a NA of 0.4. Before laser treatment the LAS glass ceramic was already transformed to a primary crystallization stage by using a heat treatment at 540°C and 660°C. Caused by nonlinear absorption processes energy is transferred from the photons to the lattice and leads to local melting. The fast cooling of the melted volume due to heat conduction enables the formation of an amorphous phase. After a second heat treatment at 830°C the laser irradiated area shows a different microstructure compared to the untreated area. Influences of the modified microstructure on mechanical and optical properties have been studied. Potential applications of this process are proposed.
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Florian Senn, Ronald Holtz, Sonja-Michaela Gross-Barsnick, and Uwe Reisgen "Laser micro-processing of ceramic glasses by ultra-short laser pulses", Proc. SPIE 10905, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXIV, 109050W (1 April 2019);

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