Figure 3. SEM images of the three Cr3C2-25NiCr powders. (a) Nano, (b) Micro, (c) NM. EDS analysis of the NM powder shows Zr and Al contaminants (d).
It is possible to differentiate the NiCr from carbide particles through EDS mapping, although there is no variation in particle morphology, even with different compositions, as can be explained from the SEM analysis. Figure 4 shows EDS mapping of the Micro powder, highlighting a Ni rich metallic particle with the same morphology of the Cr3C2.