Nanomechanical surface properties of co-sputtered thin film polymorphic metallic glasses based on Ti-Fe-Cu, Zr-Fe-Al, and Zr-W-Cu

Onyeagba, C.R.; Valashani, M.; Wang, Hongxia; Brown, Cameron; Yarlagadda, Prasad K.D.V.; Tesfamichael, Tuquabo

doi:10.1016/j.surfin.2023.103090

Surfaces and Interfaces

2023

DOI: 10.1016/j.surfin.2023.103090

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Nanomechanical surface properties of co-sputtered thin film polymorphic metallic glasses based on Ti-Fe-Cu, Zr-Fe-Al, and Zr-W-Cu

C.R. Onyeagba

M. Valashani

Hongxia Wang

et al.

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Cited by 3 publications

References 67 publications

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Emissivity and Optical Properties of Thin‐Film Metallic Glass in the Thermal Infrared Region

Lai,

Hsiao,

Wang

et al. 2023

Advanced Optical Materials

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This study displays the emissivities and optical properties of thin‐film metallic glasses in the thermal infrared (IR) region. It is found that the amorphous structure of the metallic glass hinders the movement of electrons, leading to unique optical properties in the thermal IR region. Measurements of the optical constants of NiNb thin‐film metallic glasses reveal that a high processing pressure and sputtering power yield high optical conductivity and a low damping constant. Adjusting the parameters of the sputtering processes allows the fabrication of thin‐film metallic glasses with a range of damping constants and also the change in the reflectance and emissivity. Applying optical thin film theory, the emissivity of thin‐film metallic glass in the thermal IR region can be modulated. The measured emissivity of the thin‐film metallic glass (45.35%) is significantly enhanced when compared with that of a Si substrate or metal film. Furthermore, the cooling ability of the optimal metallic glass is much higher than that of Si and metal films. These findings reveal that metallic glass films can display thermal radiative properties superior to those of metals and semiconductors, making them promising materials for use in electronic devices with excellent mechanical characteristics and heat dissipation properties.

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Emissivity and Optical Properties of Thin‐Film Metallic Glass in the Thermal Infrared Region

Lai,

Hsiao,

Wang

et al. 2023

Advanced Optical Materials

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Polymorphous nanostructured metallic glass coatings for corrosion protection of medical grade Ti substrate

Onyeagba,

Will,

Barclay

et al. 2024

Intermetallics

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Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

Gao,

He,

Rathan

et al. 2023

Mater. Res. Express

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Over recent years, metallic glass thin films (MGTFs) have found extensive applications in advanced micro-engineering systems. Consequently, there is a need to thoroughly assess the nanomechanical and tribological behaviors of MGTFs to optimize the design of efficient components. In this study, we employed the nanoindentation technique in various modes to investigate the elastic heterogeneity, tribological response, and mechanical properties of CuZr amorphous films. Before conducting the mechanical tests, annealing treatments at 500 K and 600 K were performed to create samples with different stored energies. The thermal history analysis revealed that the annealing process reduced the stored energy in the microstructure. Furthermore, the pre-annealing treatment resulted in increased hardness and Young's modulus of the thin films. Additionally, higher annealing temperatures significantly improved the wear resistance of the MGTFs. Observing the serration dynamics in the scratching test, we noticed that the annealing treatment induced larger shear bands on the wear track side. Moreover, the increase in annealing temperature led to a reduction in elastic heterogeneity, which was consistent with the enthalpy relaxation values in the samples. This suggests that the annealing temperature enhanced the densely packed atomic structure, leading to the stabilization of the thin films.

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Nanomechanical surface properties of co-sputtered thin film polymorphic metallic glasses based on Ti-Fe-Cu, Zr-Fe-Al, and Zr-W-Cu

Cited by 3 publications

References 67 publications

Emissivity and Optical Properties of Thin‐Film Metallic Glass in the Thermal Infrared Region

Emissivity and Optical Properties of Thin‐Film Metallic Glass in the Thermal Infrared Region

Polymorphous nanostructured metallic glass coatings for corrosion protection of medical grade Ti substrate

Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

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