A centimeter-size Zr₄₀Hf₁₀Ti₄Y₁Al₁₀Cu₂₅Ni₇Co₂Fe₁ bulk metallic glass with high mixing entropy designed by multi-substitution

In this paper, a Zr₄₀Hf₁₀Ti₄Y₁Al₁₀Cu₂₅Ni₇Co₂Fe₁ (at.%) bulk metallic glass (BMG) with high mixing entropy was synthesized. Designed by (Hf, Ti, Y) multi-substitution for Zr and (Ni, Co, Fe) for Cu in Zr₅₅Al₁₀Cu₃₅ BMG with low mixing entropy, this new BMG exhibits significant improvement in glass forming ability (GFA) and good plasticity among TiZrCuNi-containing BMGs with high mixing entropy. In addition, thermal properties, crystallization behaviors and mechanical properties of Zr₄₀Hf₁₀Ti₄Y₁Al₁₀Cu₂₅Ni₇Co₂Fe₁ BMG are discussed in detail. Successful formation of Zr₄₀Hf₁₀Ti₄Y₁Al₁₀Cu₂₅Ni₇Co₂Fe₁ BMG with high mixing entropy provides a novel approach in search for new high entropy alloys with non-equal atomic ratios.