|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Exploring the Spectrum of Mechanical Properties and Structural States in Metallic Glasses via Physical Vapor Deposition
||Daniel Magagnosc, Gang Feng, Le Ye, Xuemei Cheng, Daniel Gianola
|On-Site Speaker (Planned)
Whereas the structural state of metallic glasses is controlled to a limited extent by varying the cooling rate, physical vapor deposition of organic and metallic glasses has been shown produce a wider range of structures. However, the isochemical bounds of mechanical behavior have yet to be elucidated. Here, sputter deposition from a Pd77.5Cu6Si16.5 alloy target while varying the substrate temperature is employed to isochemically control the structural state and mechanical response. Increasing the deposition temperature from 333 K to 461 K results in a 33.5% increase in hardness to 9.69 GPa in amorphous films. Further increasing the temperature leads to a decrease in hardness. Changes in hardness are mirrored by systematic changes in deformation behavior with the most distinct shear bands observed alongside the greatest hardness. The variation in mechanical response, encoded at the time of deposition, indicates wide variations in glass structural state and improved control over structural state.
||Planned: Supplemental Proceedings volume