Glass Formation, Chemical Properties and Surface Analysis of Cu-Based Bulk Metallic Glasses

Abstract

This paper reviews the influence of alloying elements Mo, Nb, Ta and Ni on glass formation and corrosion resistance of Cu-based bulk metallic glasses (BMGs). In order to obtain basic knowledge for application to the industry, corrosion resistance of the Cu–Hf–Ti–(Mo, Nb, Ta, Ni) and Cu–Zr–Ag–Al–(Nb) bulk glassy alloy systems in various solutions are reported in this work. Moreover, X-ray photoelectron spectroscopy (XPS) analysis is performed to clarify the surface-related chemical characteristics of the alloy before and after immersion in the solutions; this has lead to a better understanding of the correlation between the surface composition and the corrosion resistance.

Tunable Cu2O Nanocrystals Fabricated by Free Dealloying of Amorphous Ribbons

“…Firstly, this route is simpler with no need for extraction of craft from solutions, which is often used in traditional method. Secondly, considering uniform compositions and many good properties [23], amorphous alloys are selected for first time as carriers of Cu 2 O particles. Thus, the dilute HCl-dealloyed ribbon can still possess good ductility which cannot be obtained from crystal materials.…”

Bulk metallic glassy surface native oxide: Its atomic structure, growth rate and electrical properties

“…And, of course, needless to mention that surface oxide often determines corrosion resistance of the sample. Earlier XPS studies estimated thickness of the native surface oxide thin film on CuAZr-based BMGs at about 3 nm [42]. However, detailed structural information is not available so far.…”

Electrochemical and Corrosion Behavior of Metallic Glasses

“…Nb addition to other Cu-based BMGs including (Cu 0.36 Zr 0.48 Ag 0.08 Al 0.08 ) 95 Nb 5 ) [121], (Cu 0.6 Zr 0.3 Ti 0.1 ) 100−x Nb x (x = 0-5 at %) [120,122], and (Cu 0.6 Hf 0.25 Ti 0.15 ) 98 Nb 2 [123] showed the same beneficial effect in terms of corrosion resistance in HCl, NaCl, H 2 SO 4 , HNO 3 , and NaOH electrolytes, with the enrichment of Zr, Ti, and Nb and lowering of Cu content in the passive film [121]. Simultaneous addition of Ni and Nb has been reported to be very effective in reducing pitting susceptibility and improvement of pitting corrosion resistance for Cu-Zr-Ti and Cu-Hf-Ti BMGs in different solutions [124][125][126][127].…”

“…Cu-based BMGs have been reported to be susceptible to pitting corrosion in chloride-containing solutions, while their corrosion resistance in H 2 SO 4 and HNO 3 was reported to be relatively better [122,123,125,133,136]. The influence of Cl − concentration on the corrosion behavior of Cu-based metallic glasses has been widely reported.…”