High density of genuine growth twins in electrodeposited aluminum

Abstract

We demonstrate the synthesis of highly twinned Al using electrodeposition and propose a model for the continuous twin nucleation.

Effect of growth twins on strength and microstructural evolution of nanocrystalline aluminum

“…We found that the twinned NC Al sample has a higher strength than the non-twinned NC Al sample as it has a higher yield point. These results are consistent with the higher hardness measured experimentally (more than 900 MPa for twinned Al and 600 MPa for non-twinned Al) [23]. Furthermore, although in the later stage of shear deformation the stress between non-twinned and twinned NC Al sample became comparable, twinned sample showed an obviously larger stress in the earlier stage of deformation.…”

The influence of the fluid nature on femtosecond laser ablation properties of a SiO2/Si target and synthesis of ultrafine-grained Si nanoparticles

“…In the present case of laser ablation, both twin formation processes can take place since growth under non-equilibrium conditions or thermal stresses on particles that are expected to occur, favor twin formation. 77,78 One can assume that by increasing F the rate of thermal stresses on crystalline structures increases and nanoparticles with different phases containing various crystallographic defects can be formed as a result of formation of a supercritical temperature liquid, high pressure-temperature cavitation bubble and post-irradiation of already synthesized nanoparticles.…”

A Concentrated AlCl3–Diglyme Electrolyte for Hard and Corrosion-Resistant Aluminum Electrodeposits

“…Compared to the aforementioned Al deposits obtained from AlCl 3 –[EMIm]Cl ILs, , the nanohardness of Al deposits has been significantly improved for the concentrated AlCl 3 –G2 electrolyte. In addition, as for the bulk Al with a crystallite size of 1.2–1.5 μm produced through severe plastic deformation, the nanohardness and elastic modulus are approximately 0.85 and 72 GPa, respectively .…”

“…Moreover, both the nanohardness and elastic modulus are available from the nanoindentation tests. For instance, in the AlCl 3 –1-ethyl-3-methylimidazolium chloride ([EMIm]­Cl) IL baths, the Al deposits with a crystallite size of 1 and 2 μm have been obtained. , They correspond to a nanohardness of 0.9 and 0.71 GPa, respectively. Meanwhile, the corresponding elastic modulus is 65.2 and 44.9 GPa, respectively.…”