Material development of non-ferromagnetic element by diffusion analyses for CoCrPt post-annealed perpendicular media

Itagaki, N.; Saito, Shin; Takahashi, Minoru

doi:10.1109/intmag.2005.1464229

Cited by 2 publications

(1 citation statement)

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“…In this study, we select three β stabilizers, that is, Ta, Hf, and Zr, as the Ti alloying elements in order to develop new β Ti alloys for metallic stent materials. All of the three alloying elements are non-ferromagnetic metals31, which is of great importance for stent applications.…”

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confidence: 99%

Novel Ti-Ta-Hf-Zr alloys with promising mechanical properties for prospective stent applications

Lin

Ozan

et al. 2016

Sci Rep

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Titanium alloys are receiving increasing research interest for the development of metallic stent materials due to their excellent biocompatibility, corrosion resistance, non-magnetism and radiopacity. In this study, a new series of Ti-Ta-Hf-Zr (TTHZ) alloys including Ti-37Ta-26Hf-13Zr, Ti-40Ta-22Hf-11.7Zr and Ti-45Ta-18.4Hf-10Zr (wt.%) were designed using the d-electron theory combined with electron to atom ratio (e/a) and molybdenum equivalence (Moeq) approaches. The microstructure of the TTHZ alloys were investigated using optical microscopy, XRD, SEM and TEM and the mechanical properties were tested using a Vickers micro-indenter, compression and tensile testing machines. The cytocompatibility of the alloys was assessed using osteoblast-like cells in vitro. The as-cast TTHZ alloys consisted of primarily β and ω nanoparticles and their tensile strength, yield strength, Young’s modulus and elastic admissible strain were measured as being between 1000.7–1172.8 MPa, 1000.7–1132.2 MPa, 71.7–79.1 GPa and 1.32–1.58%, respectively. The compressive yield strength of the as-cast alloys ranged from 1137.0 to 1158.0 MPa. The TTHZ alloys exhibited excellent cytocompatibility as indicated by their high cell viability ratios, which were close to that of CP-Ti. The TTHZ alloys can be anticipated to be promising metallic stent materials by virtue of the unique combination of extraordinarily high elastic admissible strain, high mechanical strength and excellent biocompatibility.

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confidence: 99%