what

MELTING of VANADIUM with E. Polturak and V. Sorkin

  1. FURTHER QUESTIONS: Kanigel et al - relatively small samples with specific potential. Does this apply more widely? What happens near surfaces, how do the layers mix????
  2. SURFACE MELTING: This is hinted at by absence of superheating of solids. The melting of the solid, which is kept at a homogeneous temperature, always begins at its free surface. The formation of thin liquid surface layer, which is observed experimentally, eliminates the barrier for nucleation of the liquid phase. Some claim this phenomenon resembles wetting of the solid by its own melt.
  3. CONCLUSIONS: Surface premelting WAS MOST pronounced for the loosest packed Va(111) surface. At melting, the Born criterion led to a linear relation between the surface defect formation energy (which for the 111 surface was close to the value predicted by EP from experimental and bulk measurements) and Tm. [BACK][NEXT]

vanadium

vanadium

vanadium

The adatoms at T=1200 K The adatoms at T=1800 K The adatoms at T=2200 K