TY - THES

T1 - Structural, electrical and mechanical properties of AgAuSi thin film metallic glasses on polymer substrates

AU - Weniger, Lisa-Marie

N1 - embargoed until null

PY - 2021

Y1 - 2021

N2 - In this thesis, the structural, electrical and mechanical properties of AgxAu85-xSi15 thin film metallic glasses (TFMGs) on polymer substrates were investigated. The films were fabricated by magnetron sputter deposition from three elemental targets, which allowed to systematically vary the composition and film thickness. In contrast to crystalline metals, where the electrical resistivity increases with decreasing film thickness, AgAuSi TFMGs were found to have a decreasing electrical resistance with decreasing film thickness. Additionally, ultrathin TFMGs with a thickness of 12 nm exhibited superior mechanical properties that were linked to the suppression of shear bands, where no material damage occurred after straining the films up to 10%. In cyclic bending tests, AgAuSi TFMGs outperformed crystalline metals due to their high elastic straining limit. The combination of these remarkable properties makes AgAuSi TFMGs possible candidates for future materials in flexible electronics.

AB - In this thesis, the structural, electrical and mechanical properties of AgxAu85-xSi15 thin film metallic glasses (TFMGs) on polymer substrates were investigated. The films were fabricated by magnetron sputter deposition from three elemental targets, which allowed to systematically vary the composition and film thickness. In contrast to crystalline metals, where the electrical resistivity increases with decreasing film thickness, AgAuSi TFMGs were found to have a decreasing electrical resistance with decreasing film thickness. Additionally, ultrathin TFMGs with a thickness of 12 nm exhibited superior mechanical properties that were linked to the suppression of shear bands, where no material damage occurred after straining the films up to 10%. In cyclic bending tests, AgAuSi TFMGs outperformed crystalline metals due to their high elastic straining limit. The combination of these remarkable properties makes AgAuSi TFMGs possible candidates for future materials in flexible electronics.

KW - Metallische Gläser

KW - Dünnschichten

KW - AgAuSi

KW - Magnetronsputterverfahren

KW - elektrische Eigenschaften

KW - strukturelle Eigenschaften

KW - mechanische Eigenschaften

KW - metallic glasses

KW - thin films

KW - magnetron sputter deposition

KW - AgAuSi

KW - electrical properties

KW - structural properties

KW - mechanical properties

M3 - Master's Thesis

ER -