Abstract:
The present work aims to study the structural behavior of the metal matrixes 25%Fe-50%Cu-25%NbH obtained by hot pressing due to different sintering temperatures. The metallic powders were mixed and then hot-pressed, with the following sintering parameters: 35MPa, 3min and 750°C/850°C/950°C. The sintered materials were analyzed by SEM and EDS to evaluate the microstructure resulting from the process of sintering metal matrix and the effectiveness of the sintering between Fe, Cu and NbH elements. The results showed Fe, Cu and Nb phases and a heterogeneous distribution, with no occurrence of segregation in the material. As the sintering temperature increased, a higher interaction between the Fe, Cu and Nb elements was observed, especially in the grain boundaries through in-line EDS microanalysis. The SEM technique is advantageous for morphological, topographic and observation of regions with different chemical compositions due to the atomic weight. In microanalysis by EDS, the results are semiquantitative and semiqualitative and may indicate the presence of stoichiometry related to the presence of a possible phase (microanalysis point) that can be confirmed with X-ray diffraction analysis.