Molecular Dynamic Simulation of Metal and Ceramic Nanopowder Compaction Process and Investigation on Effective Factors

Please enable javascript in your browser.

Babaei, Mahnoosh | 2013

707 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45519 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Khoei, Amir Reza
Abstract:
In present research forming process of nanopowders, which is a part of powder metallurgy was investigated by molecular dynamics method. Powder metallurgy is a relatively new method for production of industrial parts by pouring powder into die and compaction to desired density. One can reach parts with higher quality and strength by decreasing size of powder’s particles and entering the nano scale. Particle with smaller size have higher specific surface and due more intensity to react. Classic methods for investigation of this process don’t cover the atomic scale effects, so using newer procedures such as molecular dynamics is highly recommended. In present research, at first compaction of nickel and titania particles’ were modeled and outputs were compared to experimental data available. After reaching rather good agreement in results, effect of different factors such as loading speed, temperature, number, size and configuration of particles were investigated using copper and nickel powders. Classic molecular dynamic software named as LAMMPS was used for all the simulations
Keywords:
Compression ; Nanopowder ; Molecular Dynamics ; Metals ; Ceramic ; Powder Compaction Process ; Forming Techniques

No TOC