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Abstract: Ti-rich Ti45Zr5Cu45Ni5 bulk metallic glass with critical diameter reaching 3mm and supercooled liquid region of 42K was prepared by copper mold casting. The glass transition temperature and onset temperature of crystallization are 673K and 715K, respectively. The glassy Ti–Zr–Cu–Ni alloy is passive in 3mass% NaCl, 1N HCl and 1N H2SO4 solutions, although pitting corrosion occurred by anodic polarization at higher potential in the Cl−-containing solutions. Corrosion rates of the glassy Ti45Zr5Cu45Ni5 alloy are of the order of 10−3 mm/year in the NaCl and H2SO4 solutions and about 1×10−2 mm/year in the HCl acid. [Copyright &y& Elsevier]

Abstract: The effect of B to P concentration ratio on the glass-forming ability (GFA) and soft-magnetic properties of [(Fe0.5Ni0.5)0.78B0.22−x P x ]97Nb3 (x =0.01, 0.03, 0.05, 0.07 and 0.09) glassy alloys was investigated. By adjusting the concentration ratio of B to P, GFA and soft-magnetic properties are effectively improved. Bulk glassy alloys (BGAs) with diameters up to 1.5mm were synthesized in the composition range of x =0.03–0.07. In addition to high GFA, the FeNi-based glassy alloys exhibit excellent soft-magnetic properties, i.e., rather low H c of 0.7–0.95A/m, high μ e of 17,200–24,300 and high saturation magnetization of 0.63–0.82T. The [(Fe0.5Ni0.5)0.78B0.17P0.05]97Nb3 BGA exhibits high hardness of 890kg/mm2. The improvement of GFA and soft-magnetic properties are derived from the enhanced atomic bonding nature and phase competing process in conjugation with precipitation of (Fe, Ni)23B6 phase with complex structure. [Copyright &y& Elsevier]