Insights on the Role of Copper Addition in the Corrosion and Mechanical Properties of Binary Zr-Cu Metallic Glass Coatings

Abstract

Abstract:The effect of copper addition on the corrosion resistance and mechanical properties of binary Zr 100-x Cu x (x = 30, 50, 80, 90 at.%) glassy coatings was investigated by means of electrochemical measurements, scanning electron microscopy (SEM), energy dispersive analysis spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and nano-indentation techniques. The corrosion resistance in 0.01 M deaerated H 2 SO 4 solution and the mechanical properties of the Zr-Cu glassy coatings depend considerably upon the copper content in the glassy matrix. The top surfaces of the Zr-Cu coatings with lower Cu content were covered by a compact protective ZrO 2 passive film. The competition between the oxidation of Zr atoms (ZrO 2 film formation) and the oxidation-dissolution of Cu atoms assumed the most important role in the electrochemical behavior of the Zr-Cu glassy coatings. The generation of ZrO 2 on the surface benefited the formation of passive film; and the corrosion resistance of the metallic glass coatings depended on the coverage degree of ZrO 2 passive film. The evolution of free volume affected both the mechanical and corrosion behaviors of the Zr-Cu glassy coatings.

On the Potential of Bulk Metallic Glasses for Dental Implantology: Case Study on Ti40Zr10Cu36Pd14

“…This passive layer appears highly protective and dense, as reflected by the high polarization resistance of Ti 40 Zr 10 Cu 36 Pd 14 metallic glass (2.0 MΩ/cm 2 ) compared to the reference Ti-6Al-4V alloy (0.5 MΩ/cm 2 ). However, a very low content of copper oxide Cu 2 O was detected by XPS at the passive layer surface (Figure 7), which corroborates recent results on binary PVD Zr-Cu coatings [48]. Cu is a detrimental alloying element known to decrease drastically the corrosion resistance of metallic alloys and metallic glasses [49,50,51].…”

Fabrication, Corrosion, and Mechanical Properties of Magnetron Sputtered Cu–Zr–Al Metallic Glass Thin Film

“…The Ecorr and Icorr of 304 stainless steel are −323 mV and 1.05 μA·cm −2 in comparison with the coated Cu-Zr-Al thin film metallic glass samples. The Ecorr of 72 W sample (31.3 mV) is higher and its Icorr (0.79 μA·cm −2 ) is lower than that in 304 stainless steel and Cu-Zr metallic glass coating [41], which indicates the improved corrosion resistance. The Icorr of 84 and 96 W samples are 4.98 and 7.98 μA·cm −2 with corresponding Ecorr values of −3.79 and −117 mV, respectively.…”

“…The measured diagrams represent two broad peaks at Q 1 = 22.5 nm −1 and Q 2 = 30.0 nm −1 . It has been reported that the amorphous hump of Cu-Zr binary amorphous alloy shifted to higher Q value by increasing the Cu content [31,41,42], while an amorphous hump with a lower Q was observed in Cu-Zr amorphous alloy with a higher Zr content [43]. The two broad peaks with different Q values indicate the presence of two Cu-rich and Zr-rich amorphous phases.…”

Antimicrobial properties of Cu-based bulk metallic glass composites after surface modification

“…E. coli K12) and a culture broth (i.e. LB broth), due the influence of these parameters in the corrosion and subsequent release of Cu ions [44][45][46][47][48]. Lines of constant antimicrobial activity or percentage reduction (isolines) can be either horizontal or change as contact time increases.…”