Estudo do compósito aço/ceramico AISI-316L/Sr1,8Y0,2CrReO6 produzido através da metalurgia do pó

Abstract

This work studies the sintering of a steel/ceramic composite with stainless steel AISI 316L and Sr1.8Y0.2CrReO6 double perovskite (316L/SYCRO) by powder metallurgy. The goal was to produce a material that could be used in additive manufacture with structurally impact, corrosion and magnetic properties. AISI 316L stainless steel is a corrosion resistant material, but not magnetic. Sr1.8Y0.2CrReO6 (SYCRO) ceramic shows magnetic propriety until ~360 ºC (~640 K). 90% of 316L powder was mixed with 10% of SYCRO powder. The mixture was homogenized in a ball milling at low temperature (~77 K). The obtained powder was compacted in cylindrical forms, sealed in a evacuated quartzo tube and submitted to termal treatment for sintering. As a comparative standard, samples of 316L powder were sintered as the similar way of 316L/SYCRO samples. The sintered samples were evaluated by Scanning Electron Microscopy (SEM), X-ray Powder Diffraction (XRD), X-ray Computed Microtomography, Magnetic Susceptibility and Mechanical Compression test. The 316L/SYCRO composite showed a similar magnetism of SYCRO ceramic and a diferente mechanical behavior of sintered 316L sample. Taken into account this work it was demonstrated that it is possible to produce steel/ceramic composites with controllable contents.