Centimeter-Sized Ti-Based Quaternary Bulk Metallic Glass Prepared By Water Quenching

Till now, the developed centimeter-sized Ti-based bulk metallic glasses (BMGs) always consist of at least five elements. We report that Ti41Zr25Be28Fe6 quaternary glassy alloy can be made up to 10 mm in diameter by water quenching, while only phi 8 mm fully glassy rod can be obtained by copper mould suction casting. This alloy possesses fewer constituent elements, wider supercooled liquid region and higher specific strength than other developed centimeter-sized Ti-based BMGs and has wide prospect for practical application. Our results also indicate that for Ti41Zr25Be28Fe6 alloy which possesses relatively strong glass-forming ability, reducing the heterogeneous impurities in the melt is more effective to obtain fully glassy samples than increasing the cooling rate merely.