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.