Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
INFLUENCE OF PROCESSING PARAMETERS ON THE LASER MICROMACHINING AND TEXTURING OF 3Y-TZP COMPACTS DOPED WITH GRAPHITE
Submission Author:
Pedro Griebeler Oliveira , SC , Brazil
Co-Authors:
Pedro Griebeler Oliveira
Presenter: Pedro Griebeler Oliveira
doi://10.26678/ABCM.COBEM2021.COB2021-1859
Abstract
Ceramic materials are interesting for certain applications due to its properties, such as: low thermal conductivity, excellent wear resistance and chemical stability. Zirconia (3Y-TZP), for instance, stands as an example of high strength ceramic that has been extensively used as a material in dental and hip implants due to its outstanding mechanical properties, biocompatibility and aesthetics. However, mechanical and physical properties like thermal resistance, high hardness and brittleness, makes ceramics, such as 3Y-TZP difficult to shape and to work using conventional cutting tools, especially on its sintered form. In this sense, non-conventional machining processes, such as laser beam machining (LBM), are being tested on these materials. The aim of this work, was to optimize the process of laser micro-machining on green zirconia (3Y-TZP) by adding graphite powders on different contents (0,5%, %, 5% wt%) aiming at improving optical and thermal properties (higher light absorption and thermal conductivity). Different laser parameters were tested (laser speed, power, pulse duration) in order to study how the laser-matter interactions affect the characteristics of the laser machined/textured surfaces. Specimens were analyzed using Scanning Electron Microscopy (SEM) and White Light Interferometry (WLI),
Keywords
Zirconia, laser-machining, graphite inclusions
