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Synthesis and mechanical properties of co-deposited W nanoparticle and ZrCuAg metallic glass thin film composites

Huszar, E and Sharma, A and Székely, L and Raghavan, R and Putz, B and Edwards, TEJ and Spolenak, R and Michler, J and Pethö, L (2023) Synthesis and mechanical properties of co-deposited W nanoparticle and ZrCuAg metallic glass thin film composites. In: Thin Solid Films, 773 .

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Official URL: https://doi.org/10.1016/j.tsf.2023.139822


The combination of conventional physical vapor deposition and a gas aggregation nanoparticle source enabled the study of model systems of unique material combinations and dimensions. Zr50Cu45Ag5 thin film metallic glasses with varying contents of single-crystalline 5 nm tungsten nanoparticles were synthesized using this technique. This approach provides precise control over nanoparticle shape, size, distribution, and concentration. The films were later annealed at 150 °C, 250 °C, 350 °C, and 450 °C. At room temperature inclusion of 0.01 vol tungsten nanoparticles caused a 15 increase in the nanoindentation hardness of a thin film metallic glass, while having no significant effect on pop-in length or frequency, as seen in the loading curves. Even more remarkably, at 450 °C a control film containing no nanoparticles experienced significant segregation and subsequent crystallization, whereas this effect was repressed in the tungsten nanoparticle composite thin film metallic glass. Unobstructed by nanoparticles, at high temperatures zirconium diffused to the surface of the film, forming a crystalline layer of up to 80 nm. In contrast, this layer is kept to below 30 nm when the nanoparticles are present. The stabilization of the microstructure is also clear from indentation results, while the hardness of the reference sample changes significantly due to the undesired crystallization, the hardness of the composite remains constant.

Item Type: Journal Article
Publication: Thin Solid Films
Publisher: Elsevier B.V.
Additional Information: The copyright for this article belongs to te Authors.
Keywords: Copper alloys; Glass; Hardness; Metallic glass; Nanocomposite films; Nanoparticles; Physical vapor deposition; Silver alloys; Synthesis (chemical); Ternary alloys; Thin films; Zircaloy, Gas aggregation; Gas condensation; Metallic glass thin films; Modelling systems; Nano indentation; Nanoparticle source; Physical vapour deposition; Terminated gas condensation; Thin film composites; Thin film metallic glass, Nanoindentation
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 01 Jun 2023 08:55
Last Modified: 01 Jun 2023 08:55
URI: https://eprints.iisc.ac.in/id/eprint/81549

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