Abstract
The surface energies of solid molybdenum, niobium, tantalum, and tungsten at 1500 °C have been determined using the multi-phase equilibration technique. The values obtained were 2050, 2550, 2680 and 2830 erg/cm 2, respectively. The grain boundary energy/surface energy ratios for the four metals varied from 0.28 to 0.38 with an average of 0.32.
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