Estudo da deposição a plasma utilizando nova configuração de gaiola catódica: avaliada através da deposição de filme fino de MOS2 em Aço AISI 1020

Abstract

The use of solid lubricating films is a great option for controlling wear and friction under certain operating conditions, in addition to not harming the environment Thus, this work aims to carry out a study on plasma deposition with cathodic cage of MoS2 thin films on AISI 1020 steel substrates. From an adaptation of the cathode cage called cathode cylinders, the samples were treated in cathodic and floating potential with temperatures of 300 °C, 350 °C and 400 °C, all with an atmosphere rich in argon, to study their deposition in the two configurations of potential. After the treatments, the samples were submitted to chemical analyzes by X-ray diffraction (XRD) and Raman spectroscopy, in addition to the calotest tribological test. It was possible to quantify the coating thickness using scanning electron microscopy (SEM). In general, the results indicated success in the deposition of molybdenum disulfide in all samples treated at floating potential, and in the formation of sulfide compounds at cathode potential. It was also possible to qualify the film by observing the vibration bands after deconvolution of Raman spectroscopy, since it indicated the presence of peaks referring to MoS2 and its compounds. Finally, there was a significant reduction in wear through the cap test.