Ni- and Cu-free Ti-based metallic glasses with potential biomedical application. (August 2015)

• Record Type: Journal Article
• Authors: Guo, Y.; Bataev, I.; Georgarakis, K.; Jorge, A.M.; Nogueira, R.P.; Pons, M.; Yavari, A.R.
• Is Part Of: Intermetallics. Volume 63(2015:Aug.)
• Page Start: 86
• Page End: 96
• Publication Date: 2015-08
• Subjects: A. Metallic glasses -- B. Glass forming ability -- B. Corrosion -- D. Microstructure -- G. Biomedical; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2015.04.004
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: In the present work Ti–Fe–Si and Ti–Fe–Si–X (X = Zr, Pd, Ge) glassy alloys are discussed as potential biomedical materials. Depending on composition and experimental conditions these alloys possess glassy, quasicrystalline or crystalline structure. The glassy state and crystallization behavior of the melt spun ribbons were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), differential scanning calorimetry (DSC) and the Hank's solution was used as simulated body fluid for corrosion tests. Ternary Ti–Fe–Si alloys near the Ti65 Fe30 Si5 eutectic point were prone to form quasicrystals if the cooling rate was not high enough to retain amorphous structure. The compositions on the steeper side of the eutectic point could be vitrified. The results indicate that small additions of Zr can have a positive effect on glass formation, while additions of Ge, Pd may have a detrimental effect by promoting crystallization. Ti–Fe–Si and Ti–Fe–Si–Zr alloys exhibited high corrosion properties, superior to that of pure Ti and most of Ti-based glassy alloys reported in the literature. Being free of Ni and Cu this group of alloys may be considered for possible biomedical application. Highlights: Ti–Fe–Si and Ti–Fe–Si–X (X = Zr, Pd, Ge) glassy alloys were synthesized. Glassy, quasicrystalline or crystalline structures were observed. Minor additions of Zr had a positive effect on glass formation. New glassy alloys exhibited high corrosion properties, superior to that of pure Ti.