Characterization and determination of elastic property of high-density nanocrystalline gold prepared by gas-deposition method

Abstract

Nanocrystalline (n-) Au specimens with the density of 19400 ± 200 kg/m3 were prepared by the gas deposition method. Since rearrangement of n-Au particles on the specimen surfaces takes place just after landing, the grain boundary energy of (0.3 ± 0.15)J/m2 is comparable with 0.45 J/m2 reported for the bulk polycrystalline (p-) Au, and the concentration of vacancy type defects is about 15 × 10-4 in the as deposited state decreasing with the grain growth. The Young modulus observed at 10 K is almost the same to that estimated under the condition that stresses applied to the constituent crystallites are equal among all the crystallites while strains are variable.