Varying kinetic stability, icosahedral ordering, and mechanical properties of a model Zr-Cu-Al metallic glass by sputtering

Ultrastable glasses: new perspectives for an old problem

“…As an example, Luo et al achieved a variation of onset temperature with respect to T g ( T on /T g ) of 7.1% over one order of magnitude change of growth rate between 1 and 10 nm/min, while in the case of the organic semiconductor TPD, Kearns et al reached a lower T on /T g of 3% over more than two orders of magnitude variation in growth rate, from 0.3 to 70 nm/s [61]. This difference could be related to the fragility of the glass-forming systems [62]. A recent work by Muley et al [62] investigated the stability, mechanical properties and structure of vapor-deposited glasses of Zr 65 Cu 27.5 Al 7.5 with the same composition as those reported previously by Yu et al [51].…”

“…This difference could be related to the fragility of the glass-forming systems [62]. A recent work by Muley et al [62] investigated the stability, mechanical properties and structure of vapor-deposited glasses of Zr 65 Cu 27.5 Al 7.5 with the same composition as those reported previously by Yu et al [51]. While the general features of both studies are similar, the most stable glasses of Muley's work were achieved at different conditions and with a different degree of stability compared to Yu's work.…”

“…Dziuba et al [53] related the enhanced mechanical properties of a Cu 50 Zr 50 ultrastable glass to a low position in the potential energy landscape. Following this trend, Muley et al [62] used a relation already established [65] to relate deformation energy and fictive temperature to quantify the improvement in thermodynamic stability of their vapor deposited glasses. Nevertheless, some vapor deposited metallic glasses show the opposite behavior, an improvement of the mechanical properties together with an apparent decrease of thermodynamic stability [51].…”

Temperature Effects on the Structure and Mechanical Properties of Vapor Deposited A-Sio2

“…For any application, it is generally desirable to have films with higher elastic modulus and hardness in order to provide mechanical integrity and to ensure durability. In the case of organic and metallic glasses, PVD process parameters like deposition rate and substrate temperature have been tuned to yield denser films with high elastic modulus and hardness [16,17]. However, there is still a lack of a systematic understanding of the influence of PVD process parameters on the structure and mechanical properties of a-SiO2 films.…”

Using 4D STEM to Probe Mesoscale Order in Molecular Glass Films Prepared by Physical Vapor Deposition

“…Physical vapor deposition (PVD) can synthesize stable glassy phases of many materials, − but for organic molecules, PVD can prepare a more unusual material: glasses in which the molecules show overall orientational ordering . This anisotropy in structure causes anisotropy in optical, mechanical, and electronic properties, making the films potentially useful for organic electronics .…”