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Full-Text Articles in Materials Science and Engineering
In Situ High Temperature Tem Tensile Testing Of Pseudo Single Crystalline Si For Photovoltaic Applications, Arthur Lantreibecq, Etienne Pihan, Jean Francois Monchoux, Marc Legros
In Situ High Temperature Tem Tensile Testing Of Pseudo Single Crystalline Si For Photovoltaic Applications, Arthur Lantreibecq, Etienne Pihan, Jean Francois Monchoux, Marc Legros
Nanomechanical Testing in Materials Research and Development V
Single crystalline Silicon has the highest efficiency to convert sunlight into electricity. Its production is however costly. On the other hand, cheap polycrystalline Si cells can be produced, with a 10% lower PV conversion efficiency. A promising technique, dubbed "mono-like" Si consists in growing pseudo-single crystalline Si ingots from a tile of single crystalline seeds aligned at the bottom of the crucible. At the present time, this technique is confronted to the high density of defects that multiply during solidification, fueled by the thermal gradients generated in the furnace. Some of these defects have small impact on the electrical properties …
Dislocation Dipoles And The Nucleation Of Cracks In Silicon Nanopillars, J. Rabier, F. Abed El Nabi, J. Godet, S. Brochard, L. Pizzagalli
Dislocation Dipoles And The Nucleation Of Cracks In Silicon Nanopillars, J. Rabier, F. Abed El Nabi, J. Godet, S. Brochard, L. Pizzagalli
Nanomechanical Testing in Materials Research and Development V
To understand the brittle to ductile transtion at small scale in silicon nanopillars, plastic deformation of silicon nanopillars was investigated by atomistic simulations. Perfect dislocations were found to be nucleated from surfaces and nano cavities were evidenced resulting from dislocation dipoles annihilation. The formation of such cavities is consistent with previous atomistic calculations showing that the annihilation of dislocation vacancy dipole of perfect shuffle dislocations is associated to the formation of vacancy clusters in silicon and diamond [1]. In nanopillars such cavities contribute to the nucleation of cracks [2]. This mechanism of crack nucleation is relevant to single slip deformation …
Mechanical Response Of Face-Centered Cubic Metallic Nanospheres Under Uniaxial Compression, Selim Haj Salah, Celine Gerard, Laurent Pizzagalli
Mechanical Response Of Face-Centered Cubic Metallic Nanospheres Under Uniaxial Compression, Selim Haj Salah, Celine Gerard, Laurent Pizzagalli
Nanomechanical Testing in Materials Research and Development V
The mechanical response of metallic nanoparticles has recently attracted a lot of interest due to their specific properties compared to their bulk counterpart, which allow for novel applications in various fields, e.g., composite materials, nanomanufacturing/nano-electromechanical systems. We have employed Molecular Dynamic simulations to study the mechanical behavior of face-centered cubic metallic nanoparticles. Uniaxial compression of monocrystalline nanosphere is investigated using the EAM potentials developed by Mishin et al. [1] [2]. The resulting behaviors vary with nanoparticle size, crystallographic orientation, and temperature. This work shows that the elastic modulus of metallic nanoparticles is higher than that of the bulk material. Three …