Synthesis of Ni-based bulk metallic glasses for penetrating materials

The Ni-based bulk metallic glasses (BMGs(Ni₃₉Zr ₁₆Ti₁₃Nb₇Si₃Sn₂)) modified by Al, Hf and W have been synthesized for a specific application of penetrating materials. When Al was replaced with Zr of the Ni ₅₉Zr₁₆Ti₁₃Nb₇Si₃Sn ₂ BMG, a large glass forming ability was observed, enabling to fabricate 7 mm cylindrical amorphous specimen. Also, when Hf or W was replaced with Ni of the Ni₃₉Zr₁₆Ti₁₃Nb ₇Si₃ Sn₂ BMG, the 7 mm amorphous BMG specimen was obtained. For the Al modified BMG (Ni₅₉Zr₁₅Ti ₁₃Nb₇Si₃Sn₂Al₁). a high strength of ∼2.6 GPa with -10% plastic strain was observed. It appears that the Hf modified BMG showed an excellent candidate for the application of penetrating materials among the examined BMGs.