Effect of Si Contents on the Properties of Ti15Mo7ZrxSi Alloys

Abstract

The main purpose of this research is to evaluate the mechanical characteristics and biocompatibility of two novel titanium alloys, Ti15Mo7ZrxSi (x = 0, 0.5, 0.75, 1). These samples had already undergone grinding, polishing, cutting, and chipping. Electrochemical, metallographic, three-point bending, and microhardness studies were conducted on the studied materials to determine their corrosion behavior, microstructure, Young’s modulus, and hardness. The first investigations revealed that both samples had biphasic and dendritic structures, elastic moduli that were between the highest and minimum values achieved by around 20 GPa, and favorable behavior when in contact with physiological fluids at ambient temperature. Ti15Mo7Zr0.5Si and Ti15Mo7Zr0.75Si, the research samples, had greater corrosion potentials, reduced corrosion rates, and therefore higher corrosion resistance, as well as modulus of elasticity values that were comparable to and closer to those of human bone. The results of this investigation indicate that both alloys exhibit favorable corrosion behavior, great biocompatibility, Young’s modulus results lower than those of conventional alloys used in biomedical implants, and hardness values higher than commercially pure titanium.

Electrochemical Behaviour of an Au-Ge Alloy in an Artificial Saliva and Sweat Solution

“…On the other hand, the increase in the immersion time (from one hour to 7 days) caused a significant shift in the open-circuit potential towards the anodic direction (Table 1). The increases in the OCP values in the function of the immersion time and absence of potential drops associated with surface activation suggest that the natural corrosion products formed on the Au-Ge alloy surface are kinetically resistant to chemical dissolution [14,20], and can improve the Au-Ge alloy corrosion protection ability in an artificial sweat solution. From Figure 1, it is evident that the open-circuit potential in all the investigated periods was very stable, and, during the given measurement (60 min), did not change significantly.…”