“…They observed an improvement in corrosion resistance with increased B content. Similar electrochemical corrosion results were achieved during immersion in Ringer’s solution 22 – 24 . The good anticorrosive properties of such alloys were also resulted from the addition of gold as an alloying element 42 or as nanoparticles located in an applied coating 43 , 44 .…”
Section: Resultssupporting
confidence: 78%
“…The lowest values of corrosion current density in Ringer’s solution were observed for alloys with 1 and 2 at.% addition of Au 22 – 24 . Figure 4 Changes of open-circuit potential with time ( a ) and polarization curves ( b ) of CaMgZnYbBAu alloys in a form of plates in Ringer’s solution at 37 °C 22 – 24 . …”
Section: Resultsmentioning
confidence: 92%
“…The resorbable CaMgZnYbBAu alloys in a form of plates had an amorphous structure (Ca 32 Mg 12 Zn 38 Yb 18, Ca 32 Mg 12 Zn 38 Yb 16 B 2 ), an amorphous structure with some crystalline phases, such as CaZn, MgZn (Ca 32 Mg 12 Zn 38 Yb 17 B 1 , Ca 32 Mg 12 Zn 38 Yb 15 B 3 ) and an amorphous structure with CaZn, MgZn and CaZn 2 crystalline phases (Ca 32 Mg 12 Zn 38 Yb 16 B 1 Au, Ca 32 Mg 12 Zn 38 Yb 14 B 2 Au 2 ). All identified phases were embedded in the amorphous structure 22 – 24 . The structure studies of the alloys were completed by the surface topography analysis.…”
Section: Resultsmentioning
confidence: 99%
“… Changes of open-circuit potential with time ( a ) and polarization curves ( b ) of CaMgZnYbBAu alloys in a form of plates in Ringer’s solution at 37 °C 22 – 24 . …”
Section: Resultsmentioning
confidence: 99%
“…The resorbable CaMgZnYbBAu alloys in a form of plates had an amorphous structure (Ca . All identified phases were embedded in the amorphous structure [22][23][24] . The structure studies of the alloys were completed by the surface topography analysis.…”
Calcium-based alloys can be promising candidates for use as biodegradable implants because of attractive properties as mechanical, corrosive, and biocompatible. In the work, the biocompatibility authors discussed the results of the Ca32Mg12Zn38Yb18−xBx (x = 0, 1, 2, 3 at.%) and Ca32Mg12Zn38Yb18−2xBxAux (x = 1, 2 at.%) alloys. The tests were performed using a MTT assay. The corrosion behavior of such Ca-based alloys in PWE fluid at 37 °C was studied and compared with the results in Ringer’s solution from previous works. Electrochemical tests were presented by open circuit potential and potentiodynamic curves. Different concentrations of boron and gold in the alloys caused changes in the corrosion results. The best corrosion resistance in PWE solution was observed for the Ca-based alloy with 2 at.% Au due to the lowest value of the corrosion current density (jcorr), equal to 10.6 µA·cm−2. A slightly higher value of jcorr was obtained for the Ca32Mg12Zn38Yb15B3 alloy with the lowest roughness values. The results of the cytotoxicity tests also showed that the alloy with 3 at.% boron was characterized by the highest cell viability. The investigation results discussed in the work allow us to suggest that the presented calcium alloys with 3 at.% of B, and 2 at.% of Au addition may be promising materials for the use in implantology.
“…They observed an improvement in corrosion resistance with increased B content. Similar electrochemical corrosion results were achieved during immersion in Ringer’s solution 22 – 24 . The good anticorrosive properties of such alloys were also resulted from the addition of gold as an alloying element 42 or as nanoparticles located in an applied coating 43 , 44 .…”
Section: Resultssupporting
confidence: 78%
“…The lowest values of corrosion current density in Ringer’s solution were observed for alloys with 1 and 2 at.% addition of Au 22 – 24 . Figure 4 Changes of open-circuit potential with time ( a ) and polarization curves ( b ) of CaMgZnYbBAu alloys in a form of plates in Ringer’s solution at 37 °C 22 – 24 . …”
Section: Resultsmentioning
confidence: 92%
“…The resorbable CaMgZnYbBAu alloys in a form of plates had an amorphous structure (Ca 32 Mg 12 Zn 38 Yb 18, Ca 32 Mg 12 Zn 38 Yb 16 B 2 ), an amorphous structure with some crystalline phases, such as CaZn, MgZn (Ca 32 Mg 12 Zn 38 Yb 17 B 1 , Ca 32 Mg 12 Zn 38 Yb 15 B 3 ) and an amorphous structure with CaZn, MgZn and CaZn 2 crystalline phases (Ca 32 Mg 12 Zn 38 Yb 16 B 1 Au, Ca 32 Mg 12 Zn 38 Yb 14 B 2 Au 2 ). All identified phases were embedded in the amorphous structure 22 – 24 . The structure studies of the alloys were completed by the surface topography analysis.…”
Section: Resultsmentioning
confidence: 99%
“… Changes of open-circuit potential with time ( a ) and polarization curves ( b ) of CaMgZnYbBAu alloys in a form of plates in Ringer’s solution at 37 °C 22 – 24 . …”
Section: Resultsmentioning
confidence: 99%
“…The resorbable CaMgZnYbBAu alloys in a form of plates had an amorphous structure (Ca . All identified phases were embedded in the amorphous structure [22][23][24] . The structure studies of the alloys were completed by the surface topography analysis.…”
Calcium-based alloys can be promising candidates for use as biodegradable implants because of attractive properties as mechanical, corrosive, and biocompatible. In the work, the biocompatibility authors discussed the results of the Ca32Mg12Zn38Yb18−xBx (x = 0, 1, 2, 3 at.%) and Ca32Mg12Zn38Yb18−2xBxAux (x = 1, 2 at.%) alloys. The tests were performed using a MTT assay. The corrosion behavior of such Ca-based alloys in PWE fluid at 37 °C was studied and compared with the results in Ringer’s solution from previous works. Electrochemical tests were presented by open circuit potential and potentiodynamic curves. Different concentrations of boron and gold in the alloys caused changes in the corrosion results. The best corrosion resistance in PWE solution was observed for the Ca-based alloy with 2 at.% Au due to the lowest value of the corrosion current density (jcorr), equal to 10.6 µA·cm−2. A slightly higher value of jcorr was obtained for the Ca32Mg12Zn38Yb15B3 alloy with the lowest roughness values. The results of the cytotoxicity tests also showed that the alloy with 3 at.% boron was characterized by the highest cell viability. The investigation results discussed in the work allow us to suggest that the presented calcium alloys with 3 at.% of B, and 2 at.% of Au addition may be promising materials for the use in implantology.
High entropy amorphous alloys (HEAAs) are materials that have received much attention in recent years. They exhibit many unique properties; however, research on their composition design method has not been deep enough. In this paper, we summarized some effective composition design strategies for HEAAs. By adjusting the atomic ratio from quinary bulk metallic glasses, Ti20Zr20Cu20Ni20Be20 HEAA with a high fracture strength of 2315 MPa was designed. By similar element addition/substitution, a series of Ti–(Zr, Hf, Nb)–Cu–Ni–Be HEAAs was developed. They possess good glass-forming ability with a maximum critical diameter of 30 mm. Combining elements from those ternary/quaternary bulk metallic glasses has also proved to be an effective method for designing new HEAAs. The effect of high entropy on the property of the alloy, possible composition design methods, and potential applications were also discussed. This paper may provide helpful inspiration for future development of HEAAs.
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