Molecular Dynamics Studies of Cold Welding of FCC Metallic Nanowires

Pei Hsing Huang; Yi Fan Wu

doi:10.4028/www.scientific.net/AMR.875-877.1367

Paper Titles

The Effect of Grain Size and Cobalt Content on the Wear of Ultrafine Cemented Carbide Tools
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CO₂ Laser Induced Blind-Via for Direct Electroplating
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Nanotechnology of Grained Multyligand Luminescent Materials for SSL, SC and X-Ray Sensors
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Composite Polymer Joining by Laser Combined Hybrid Laser Process
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Molecular Dynamics Studies of Cold Welding of FCC Metallic Nanowires
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Effect of Mineralizer Concentration on ZnO Crystals Synthesized by Hydrothermal Method
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A Method of Improving Accuracy of Lapping Main Cylinder of Brake-Pump
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High-Frequency Electromagnetic Waves for Diesel Soot Oxidation Strategy
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Growth and Morphology of SbSe Based Island Films
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 875-877Molecular Dynamics Studies of Cold Welding of FCC...

Molecular Dynamics Studies of Cold Welding of FCC Metallic Nanowires

Abstract:

The atomistic-scale cold welding processes for metallic nanowires (NWs) are studied using embedded-atom molecular dynamics (MD) simulations. The mechanical behavior and structural evolution of the FCC metallic nanowires, including Au, Ag, and Cu materials, that experienced a mechanical stretching break and solid-phase pressure welding process, were investigated. The welding temperatures (T_w) ranging from 100 to 900 K were systemically investigated on the effects of welding strength. The ratio of welding strength, R_ws, defined as the ratio between the welding strength and the original yield strength of NWs, was employed to identify the welding quality. Simulation results show that the R_ws of Au NWs is better than those of Ag and Cu welded at room temperature; however, for welding at high temperatures (600~900 K) the R_ws value of Ag NWs is the best. The R_ws values of Au NWs using cold welding show less variance than with high temperature welding, reflecting that the application of cold-welding on the Au NWs is highly feasible. The R_wsvalues for NWs with small diameters are generally higher than those with large diameters. The breaking places of the tensile test for the post-welded NWs didnt occur at the welding region, indicating that the broken wires can be robustly reconnected through solid-phase mechanically-assisted welding methods.