An ultra-fast laser with central wavelength at 1064？nm and 10？ps pulse duration？was used to tightly focus laser radiation？with a microscope objective inside the volume of nucleated Lithium Aluminosilicate (LAS) glass-ceramic. The nonlinear absorption？of the LAS glass-ceramic was measured？for different laser parameters and a thermal simulation was performed to determine the temperature field inside the laser-modified area. After laser processing,？the samples were crystallized in a furnace and the effect of the laser-induced modifications on the microstructure was analyzed with SEM. The SEM analysis shows an increase in the length and size of whisker-shaped？β-spodumene crystals in the laser-modified area. By increasing the dimension of these whisker-shaped crystals, the flexural strength of LAS can be improved locally.？First？four-point bending flexural tests were performed to examine the influence on the mechanical properties.
Mauclair, C., Memillod-Bolndin, A., Huot, N., Audouard, E. and Stoian, R. (2008) Ultrafast Laser Writing of Homogenous Longitudinal Waveguides in Glasses Using Dynamic Wavefront Correction. Optics Express, 16, 5481-5492.
Qiu, J., Miura, K. and Hirao, K. (1998) Three-Dimensional Optical Memory Using Glasses as a Recording Medium through a Multi-Photon Absorption Process. Japanese Journal of Applied Physics, 37, 2263-2266.
Masuda, M., Sugioka, K., Cheng, Y., Aoki, N., Kawachi, M., Shihoyama K., Toyoda, K., Helvajian, H. and Midorikawa, K. (2003) 3-D Microstructuring inside Photosensitive Glass by Femtosecond Laser Excitation. Applied Physics A, 76, 857-860.
Laczka, M., Laczka, K., Cholewa-Kowalska, K., Kounga, A.B. and Appert, C. (2013) Mechanical Properties of a Lithium Disilicate Strengthened Lithium Aluminosilicate Glass-Ceramic. Journal of the American Ceramic Society, 97, 1-4.
Miyamoto, I., Cvecek, K. and Schmidt, M. (2011) Evaluation of Nonlinear Absorptivity in Internal Modification of Bulk Glass by Ultrashort Laser Pulses. Optics Express, 19, 10714-10727. https://doi.org/10.1364/OE.19.010714
Miyamoto, I., Cvecek, K., Okamoto, Y., Schmidt, M. and Helvajian, H. (2011) Characteristics of Laser Absorption and Welding in FOTURAN Glass by Ultrashort Laser Pulses. Optics Express, 19, 22961-22973. https://doi.org/10.1364/OE.19.022961
Sakaue, K., Yoneyama, S., Kikuta, H. and Takashi, M. (2008) Evaluating Crack Tip Stress Field in a Thin Glass Plate under Thermal Load. Engineering Fracture Mechanics, 75, 1015-1026. https://doi.org/10.1016/j.engfracmech.2007.04.025