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Physical vapor deposited (PVD) WB2 thin films crystallize in the α-AlB2-prototype structure rather than in their thermodynamically stable ω-W2B5-z-prototype structure. Contrary to the majority of α-AlB2-type transition metal diborides (TMB2), α-WB2 exhibits a more ductile character. Combining density functional theory and sophisticated experiments, we show that the stability of α-WB2 thin films is...
Standard cell culture tests according to ISO 10993 have only limited value for the biocompatibility screening of degradable biomaterials such as Mg alloys. The correlation between in vitro and in vivo results is poor. Standard cytotoxicity tests mimic the clinical situation to only a limited extent, since in vivo proteins and macromolecules in the blood and interstitial liquid will influence the corrosion...
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