Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1480476 | Journal of Non-Crystalline Solids | 2015 | 5 Pages |
•Electroless plating is used to deposit Ni-P films on Zr-based bulk metallic glasses with different pH values and thicknesses.•The special structure exhibits plasticity to 10.6 %, and it is without obvious sacrifice of the yielding strength.•The amorphous Ni-P films provide high radial confinement stress, which leads to the formation of multiple shear bands.
In this study Electroless plating is used to deposit amorphous Ni-P films on the surface of the Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit.1) bulk metallic glasses (BMGs) with different pH values and film thicknesses. The special amorphous/amorphous structure exhibited large plasticity. The plastic strain is 10.6% for the coated pillars with a coating thickness of 86.5 μm, which is 5.9 times of 1.8% of the bare Vit.1 pillars. The amorphous Ni-P films provide high radial confinement stress, which leads to more homogeneous formation of a high density of smaller shear bands at the Ni-P/Vit.1 interface. The technique provides an effective way to enhance the plasticity without obvious sacrifice of the yielding strength for BMGs at room temperature.