Figure 5. Summary of compressive strength results
In comparison to the compressive strengths, the sprayed ”S” and the extruded ”E” samples characterize significantly high values. It is assumed that the particle acceleration minimizes the defects. The samples with ”X” are loaded in the direction of feed, which means that the front sides of the layers are subjected to pressure. It can be assumed that the layer geometry has less influence since the layers support each other against buckling. It is assumed that the layer geometry has an influence on the two sample batches ”Z” and ”Y”. The cross-section of the extrudate is not rectangular with sharp edges, but rounded, so that defects accumulate.
A comparison of the bending tensile strengths of the individual batches shows figure 6.