We report in this article, the Dysprosium doping effects on microstructure and mechanical properties of nanoporous metallic gold, synthesized by electrochemical dealloying of Ag₇₀Au₃₀ and Ag₇₀Au₂₉Dy₁ alloys. It is shown that these dealloyed nanoporous metallic materials exhibit the mean ligament diameter in a length scale of 5–10 nm. The variation of ligament diameter in pure and Dysprosium doped nanoporous Au with annealing temperature influences their mechanical properties. Higher microhardness value has been obtained around 10 nm ligament diameter on both pure and Dysprosium doped nanoporous gold. The maximum values of Vickers hardness H_V obtained from the analysis of indentation diagonals with applied load are close to the H_V value reported for bulk gold. Since the nanoporous metallic materials behave in a way like compressible sponge materials, we used the well-known density scaling equation for the determination of ligament yield strength of pure and Dysprosium doped nanoporous gold with ligament diameter. The results obtained have been finally compared with literature reports.

我们在本文中报道了镝掺杂对通过 Ag ₇₀ Au ₃₀和 Ag ₇₀ Au ₂₉ Dy ₁合金电化学脱合金合成的纳米多孔金属金的微观结构和机械性能的影响。结果表明，这些脱合金纳米多孔金属材料的平均韧带直径在 5-10 nm 的长度范围内。纯纳米多孔金和镝掺杂纳米多孔金的韧带直径随退火温度的变化影响其机械性能。在纯纳米孔金和镝掺杂纳米孔金上，在韧带直径约 10 nm 时获得了较高的显微硬度值。通过对施加载荷的压痕对角线进行分析获得的维氏硬度 H _V的最大值接近于针对散装金报告的H _V值。由于纳米多孔金属材料的行为类似于可压缩海绵材料，因此我们使用众所周知的密度缩放方程来确定具有韧带直径的纯和镝掺杂纳米多孔金的韧带屈服强度。最后将所得结果与文献报道进行了比较。