Both thermoplastic formability and electrical conductivity of Al–Ni–Y metallic glass with 12 different compositions have been investigated in the present study with an aim to apply as a functional material, i.e. as a binder of Ag powders in Ag paste for silicon solar cell. The thermoplastic formability is basically influenced by thermal stability and fragility of supercooled liquid which can be reflected by the temperature range for the supercooled liquid region (ΔTx) and the difference in specific heat between the frozen glass state and the supercooled liquid state (ΔCp). The measured ΔTx and ΔCp values show a strong composition dependence. However, the composition showing the highest ΔTx and ΔCp does not correspond to the composition with the highest amount of Ni and Y. It is considered that higher ΔTx and ΔCp may be related to enhancement of icosahedral SRO near Tg during cooling. On the other hand, electrical resistivity varies with the change of Al contents as well as with the change of the volume fraction of each phase after crystallization. The composition range with the optimum combination of thermoplastic formability and electrical conductivity in Al–Ni–Y system located inside the composition triangle whose vertices compositions are Al87Ni3Y10, Al85Ni5Y10, and Al86Ni5Y9.
Bibliographical notePublisher Copyright:
© 2018, The Korean Institute of Metals and Materials.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry