Effects of Sr on the glass-forming ability and corrosion behaviour of Mg–Zn–Ca–Cu bulk metallic glass

Abstract

Mg-based bulk metallic glass (BMG) is a biodegradable metal with significant potential advantages as an implant material. To investigate the effect of Sr addition on the glass-forming ability (GFA) and its effect on the mechanical properties and corrosion behaviours of Mg-Zn-Ca-Cu BMG, a series of Mg 66-x Zn 29.5 Ca 4 Cu 0.5 Sr x (x = 0, 0.3, 0.6, and 0.9 at.-%) were synthesised and investigated in this study. Microstructural characterisation, GFA and corrosion resistance measurements were carried out by XRD, DSC, SEM, immersion and electrochemical corrosion tests. The results showed that the addition of Sr improved the GFA and mechanical properties and enhanced and adjustable corrosion performance. In addition, the mechanical and corrosion property analyses showed that the Mg 65.7 Zn 29.5 Ca 4 Cu 0.5 Sr 0.3 alloy exhibited the best mechanical properties and bio-corrosion resistance.

Corrosion resistance improvement in 6Cr13 martensitic stainless steel via quenching‐tempering and partitioning

“…The resistance of CPE can be expressed by the following equation [ 24 ] : $$$Z=\frac{1}{{Y}_{0}{(j\omega )}^{n}},$$$where Y 0 is the frequency independent, j is the imaginary number, ω is the radial frequency and n is the dispersion coefficient related to the surface homogeneity of solid electrodes. According to the work of other researchers, [ 25,26 ] the value of Y 0 can be regarded as the characterization parameter of the passivation film thickness of MSS. From the results of the R ct and Y 0 , the value of R ct becomes increased with the T&P treatment temperature increase from 200 to 400°C and the value of Y 0 decreased, simultaneously.…”