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. 2016 Mar 31;11(3):e0152566. doi: 10.1371/journal.pone.0152566

Table 2. Surface free energy parameters for uncoated and TiC coated titanium disks.

γtot [mJ/m2] γd [mJ/m2] γp [mJ/m2] γ+ [mJ/m2] γ- [mJ/m2]
Uncoated sample 51.54 43.02 8.52 1.44 12.56
TiC coated sample 44.83 44.7 0.13 0 11.94

γtot = surface total free energy; γd = dispersed component; γp = polar component; γ+ = acid fraction; γ- = basic fraction.