A5015007893- Nanoporous metals and alloys
- Anodic Oxide Films and Nanostructures
- Electrodeposition and Electroless Coatings
- Microstructure and mechanical properties
- Supercapacitor Materials and Fabrication
- Electrocatalysts for Energy Conversion
Chinese Academy of Sciences
2019-2024
Materials often fail prematurely or catastrophically under load while containing voids, posing a challenge to materials manufacturing. We found that metal (gold) spherical voids with fraction of up 10% does not fracture in tension when the are shrunk submicron nanometer scale. Instead, dispersed nanovoids increase strength and ductility material simultaneously reducing its weight. Apart from suppressed stress strain concentration, such structure provides enormous surface area promotes...
Surface triple junctions (STJs), i.e., the termination lines of grain boundaries at solid surface, are common line defects in polycrystalline materials. Compared with planar such as and surfaces, STJ usually overlooked a material's strengthening although abundant atoms may reside STJs many nanomaterials. In this study, by situ compression coarse-grained nanocrystalline nanoporous gold samples an electrochemical environment, effect on strength was successfully decoupled from grain-boundary...