| Abstract Scope |
The porous material composed of nanoparticles (NPs) covered by ceramic coatings can be used in various applications as the materials for energy absorption, damping, and generation, as well as optical and light-weight multifunctional aerospace materials. The goal of the present work is to reveal the fundamental mechanisms of load transfer and fragmentation in hybrid NPs considered as building blocks of porous nanocomposites. For this purpose, the molecular dynamics compression and tension simulations of NPs composed of Si cores and SiC shells are performed. The shells represent coatings of individual nanoparticles, which can partially overlap and increase the mechanical integrity and durability of the material composed of such hybrid NPs. The effects of shell thickness, degree of shell overlap, NP size, temperature, shell polytype on the key mechanical properties of the NPs, such as elastic modulus, fracture stress, and toughness, are determined and compared with computational results obtained for single-material NPs. |