Sinterização de cerâmica a base de alumina com o auxilio do laser contínuo de co2

Abstract

The objective of this study is to establish a methodology for continuous laser sintering using the CO2 for the processing of alumina-based ceramics. Therefore, we prepared specimens of both pure alumina ceramics, as well as concentration 5%, 10%, 15% silica in its composition to control the contraction of the material, vickers hardness tests performed and analysis in the SEM and EDS, to analyze the results and evaluate the quality of sintering. Samples sintered using CO2 laser presented results of hardness similar sintering conventional, in a time of 2 past 1 minute each at a temperature of laser ranging from 1500 ° C - 1700 ° C, also observed that the silica got a lock on contraction of the material and that the sample had no little change using dimensional laser similar to the ones made of ceramic high-temperature furnace. Thus concluded a methodology where the ceramic sintering presents the results of hardness and contraction similar to the sintering sintered in conventional furnaces, sintering time but with very low compared to conventional methodology sintering.