Nanomaterials Through Powder Metallurgy: Production, Processing, and Potential Applications Toward Energy and Environment

Employing classical isothermal molecular dynamics, we simulated coalescence of mesoscopic Au nanodroplets, containing from several thousands to several hundred thousands of atoms, and sintering of mesoscopic solid Au nanoparticles. For our atomistic simulations, we used the embedded atom method. The employed open access program large-scale atomic/molecular massively parallel simulator makes it possible to realize parallel graphical processing unit calculations. We have made a conclusion that the regularities and mechanisms of the nanodroplet coalescence (temperature is higher than the nanoparticle melting temperature) and of the solid nanoparticle sintering differ from each other. We have also concluded that the nanodroplet coalescence may be interpreted as a hydrodynamic phenomenon at the nanoscale whereas sintering of solid nanoparticles is a much more complex phenomenon related to different mechanisms, including collective rearrangements of atoms, the surface diffusion, and other types of diffusion. At the same time, collective rearrangements of atoms relate not only to the solid nanoparticle sintering but also to the nanodroplet coalescence. In general, our molecular dynamics results on sintering of Au nanoparticles consisting of 10 000–30 000 atoms agree with the Ferrando–Minnai kinetic trapping concept that was earlier confirmed in molecular dynamics experiments on Au nanoclusters consisting of about 100 atoms.

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Fabrication and Applications of Advanced and Innovative Nano-Composite Materials

Khobragade

2024

Advances in Chemical and Materials Engineering

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Materials with minimum one phase in the nanometer range (1-100 nm) are considered nanocomposites. Nanocomposites are very promising material for a huge diversity of applications in various fields due to their excellent mechanical, electrical, and machining properties. These materials possess enhanced and exceptional properties compared with other conventional materials, which make the application of nanocomposites in many potential areas. Much research has been done to promote and improve the properties and characteristics of nanocomposites using various manufacturing methods. This chapter represents the overview of enhanced features and matrix materials used in nanocomposites with their important aspects. The various fabrication techniques are discussed in this chapter, along with their applications and current and future aspects. This will ensure upcoming researchers to find revolutionary nanocomposites with advanced applications.

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Nanomaterials Through Powder Metallurgy: Production, Processing, and Potential Applications Toward Energy and Environment

Cited by 3 publications

References 93 publications

Second-order bulk modulus with thermal expansivity for nanomaterials

Second-order bulk modulus with thermal expansivity for nanomaterials

When mechanisms of coalescence and sintering at the nanoscale fundamentally differ: Molecular dynamics study

Fabrication and Applications of Advanced and Innovative Nano-Composite Materials

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