Caracterização de materiais compósitos a base de aço inox e alumina.

Abstract

The constant need for components and parts to have special characteristics makes it necessary to search for the capacity to meet these demands in the properties of the composite materials. The use of ceramics as a coating for household tools, cutting tools for high speed machining and the production of auto parts shows the great potential of this material for the most varied applications, as well as the stainless steel, which has a well-known use in the most varied industrial fields. The characteristics generated from the combination of ceramic and stainless steel in an ingot formed by these materials was the object of this study. While ceramics present high hardness and wear resistance characteristics and stainless steel has ductility and good mechanical conformation, both materials present resistance to oxidant, saline and even corrosive environments. This study aimed at characterizing the properties generated by the interaction of ceramics and stainless steel in an ingot formed by these two materials in a sintering process making parts with the properties of ceramics and stainless steel. In order to reach these goals, a matrix was developed for the compacting of the alumina powders Al 2O3 and stainless steel at pressures of about 300MPa forming ingots with specific dimensions and masses and varied proportions of the constituents having been sintered at different temperatures that resulted in ceramic/steel PASTILHAS and making it possible micrograph studies and grain boundary aspects by using optical microscopy techniques. The hardness of the phases was obtained by using the Vickers microhardness tests and therefore, determining the efficiency of the applied methodologies. As a consequence, the interaction between the constituents and the effective routine necessary to obtain the materials or components made with these elements combined.