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Vickers hardness measured on the top (A) and bottom (B) of the samples. Box plots are shown with median in solid line, whiskers represent maximum/minimum values, and solid dots represent 5th/95th percentiles. Statistically significant difference: t = p < 0.05 vs. TEC, s = p < 0.05 vs. SDR, f = p < 0.05 vs. FBF. No statistically significant differences were found between the top and bottom (n = 50).
