The Significant Impact of Carbon Nanotubes on the Electrochemical Reactivity of Mg-Bearing Metallic Glasses with High Compressive Strength

Abstract

Here, we elucidate the significant impact of carbon nanotubes (CNTs) on the electrochemical behavior of Mg-based amorphous composite materials that were reinforced with CNTs while using pressure die casting. The addition of 3 vol % CNTs led to an increase in the compressive strength of Mg-based amorphous material from 812 MPa to 1007 MPa, and the fracture strain from 1.91% to 2.67% in the composite. Interestingly, the addition of CNTs significantly contributed to the enhancement of corrosion resistance of Mg-based glass by ~30%. The superior mechanical properties are primarily related to the fact that the addition of CNTs hindered the growth of shear bands (cracks), while the high corrosion resistance is related to inferior wettability and the bridging effect between adherent corrosive oxide film and the matrix that provided enhanced corrosion resistance.

Characterization and strengthening mechanism of CNT/TiB2 particulates added AZ91D composites

“…It is observed that the inclusion of CNTs increases resistance to corrosion by lowering the current density and improving potential [55]. Among the secondary addition to magnesium composites, CNTS are, without hesitation, an excellent choice [56]. CNTs possess poor water wettability and sturdy corrosion resistance; galvanic corrosion is observed between the magnesium matrix and CNTs [57].…”

Vibration monitoring for composite structures using buckypaper sensors arrayed by flexible printed circuit

“…Under pressure, the average distance between CNTs is reduced, which reduces the tunneling resistance. [33]Therefore, during the vibration fatigue cycle, as the vibration magnitude increases, the laminate's bending strain continues to increase, and the amplitude of the ΔR/R 0 of the BP sensor also increases significantly. When the damage accumulates and causes microcracks in the substrate of laminate, it will cause CNTs contact fracture, increasing the ΔR/R 0 of BP sensors and cannot return to its original state.…”