Influencing the Crystallization of Glass-Ceramics by Ultrashort Pulsed Laser Irradiation after Nucleation

• 作者: Florian Senn Ronald Holtz Sonja-Michaela Gross-Barsnick Uwe Reisgen
• 来源期刊: 玻璃与陶瓷期刊(英文)
• 学科: 医学
• 关键词: GLASS-CERAMICS Microstructure Nonlinear ABSORPTION PICOSECOND Laser
• 年，卷（期）: 2018,（1）
• 页码范围: 1-11
• 页数: 11页
• 分类号: R73

摘要

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.