Corrosion Behavior of Ti-Based In Situ Dendrite-Reinforced Metallic Glass Matrix Composites in Various Solutions

Abstract

The electrochemical corrosion behaviors of Ti 40 Zr 24 V 12 Cu 5 Be 19 in situ dendrite-reinforced metallic glass matrix composites (MGMCs) were investigated by potentiodynamic polarization experiments and electrochemical impedance spectroscopy in acidic, salty, and alkaline solutions. Ti 40 Zr 24 V 12 Cu 5 Be 19 in situ dendrite-reinforced MGMCs have an impressive corrosion resistance in strong acidic environment, while their performance was not so great in strong alkaline environment. Further immersion test in same solutions revealed similar chemical corrosion behaviors. XRD and SEM examinations were conducted to check the structure and surface modification of the material during the corrosion process. EDS test indicated that the amorphous matrices, which show excellent corrosion resistance, have a considerable composition variation from its crystalline dendrites counterpart.

Electrochemical and Friction Characteristics of Metallic Glass Composites at the Microstructural Length-scales

“…7d. Similar corrosion susceptibility was reported for a Ti-based metallic glass composite tested in different electrolytes 32,33 . The composition of the amorphous matrix was found to be Zr 46.8 Ti 12.6 Nb 6.5 Cu 20.8 Ni 13.2 and that of the crystalline dendrite was Zr 72.4 Ti 9.4 Nb 13.8 Cu 2.4 Ni 2.0 .…”

Metallic glass matrix composites

“…The investigation of the wear rate indicates that the graphite-/ ZrC-reinforced bulk metallic glass composites display an even lower wear rate than the 100Cr6-bearing steel [477] . In our research group, the corrosion behavior of in-situ dendrite / metallic glass matrix composites has been investigated very recently [490][491][492].…”

The Corrosion Behavior of Ti-Based Metallic Glass Matrix Composites in the H2SO4 Solution

“…For the rod-shaped samples made by the suction-casting process, cooling rates could vary drastically along the radial direction, resulting in the different microstructure of the crystalline and amorphous phases. And our previous work suggests that certain elements dissolution preference is bound to occur owing to the phase inhomogeneous nature of these composites [17]. Therefore, it is of considerable interests to study how the corrosion behavior of these composites varying with their sizes.…”

“…Therefore, it is of considerable interests to study how the corrosion behavior of these composites varying with their sizes. In this study, we choose the Ti 46 Zr 20 V 12 Cu 5 Be 17 MGMCs with different diameters from Φ2 to Φ6 mm and conducted both the electrochemical and chemical corrosion tests on these samples. The electrochemical corrosion properties have been investigated by means of potentiodynamic, potentiostatic, and electrochemical impedance spectroscopy (EIS).…”