Effects of Film Thickness of ALD-Deposited Al2O3, ZrO2 and HfO2 Nano-Layers on the Corrosion Resistance of Ti(N,O)-Coated Stainless Steel

Dinu, Mihaela; Wang, Kaiying; Mouele, Emile Salomon Massima; Parau, Anca Constantina; Vlădescu, Alina; Liu, Xinhua; Braic, V.; Petrik, Leslie; Braic, M.

doi:10.3390/ma16052007

Cited by 5 publications

(4 citation statements)

References 67 publications

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“…Frontiers in Nanotechnology frontiersin.org application of many other nanomaterials such as selective nanofiber (Totito et al, 2023) composite membranes, photocatalysts (Mouele et al, 2023), thin films (Rossouw et al, 2022;Dinu et al, 2023) and nanoparticles (Pereao et al, 2017;Böke et al, 2023). The nanobiology-focused researchers work on several different fields.…”

Section: University Of the Western Capementioning

confidence: 99%

Nanoscience teaching and research program in South Africa

Lindsay,

Nel

2024

Front. Nanotechnol.

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Since 2012, the National Nanoscience Teaching and Training Platform (NNPTTP), funded by the South African Department of Science and Innovation (DSI), has been responsible for overseeing Africa’s first-ever master’s in nanoscience program. For over a decade, the NNPTTP has seen the cooperation of four partner universities across South Africa, namely, the University of Johannesburg (UJ), University of the Free State (UFS), University of the Western Cape (UWC), and Nelson Mandela University (NMU), culminating in over 250 graduates trained in either nanophysics, nanochemistry, or nanobiology. Originally established to train professionals for a nanotechnology-based industry, both in South Africa and internationally, the program and platform has evolved into a testament to scientific collaboration. This paper discusses the program’s framework, successes and challenges, related research, and future plans.

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Section: University Of the Western Capementioning

confidence: 99%

Nanoscience teaching and research program in South Africa

Lindsay,

Nel

2024

Front. Nanotechnol.

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“…The functional surface treatment of metal foils has been widely employed to improve the properties of metal foils, such as anti-oxidation [ 1 , 2 ], corrosion resistance [ 3 , 4 ], and electric resistivity [ 5 , 6 ]. However, their complex structures pose a significant challenge in measuring the electrical resistivity of these advanced conductive metal foils.…”

Section: Introductionmentioning

confidence: 99%

Electrical Resistivity Measurements of Surface-Coated Copper Foils

Ni,

Yan,

Liu

et al. 2024

Materials

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Due to the direct contact between the probe and sample, the contact of the four-probe method is important for the structural integrity of the sample and the accuracy of electrical resistivity measurements, especially for surface-coated metal foils with multilayered structures. Here, we analyzed the accuracy and stability of four-probe method probing on different sides of copper (Cu) foils covered with graphene (Gr). Theoretical simulations showed similar potential distributions on the probe tip when probing on the Cu and Gr sides. The resistivity of the Gr/Cu foil was 2.31 ± 0.02 μΩ·cm when measured by probing on the Cu side, and 2.30 ± 0.10 μΩ·cm when measured by probing on the Gr side. The major difference in the mean deviation is attributed to surface damage. In addition, the method of probing on the Cu side was sensitive to the resistivity changes of Gr induced by polymers with a dielectric constant range of 2~12, which is consistent with the calculations based on the random phase approximation theory. Our results demonstrated that the probing position on the metal side in the four-probe method can effectively protect the structural integrity of the functional surface-coated layer and maintain the high sensitivity of the measurement, providing guidance for the resistivity measurements of other similarly heterogeneous materials.

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“…However, HfO 2 provides better long-term protection [11,12]. Dinu [13] investigated the corrosion susceptibility of Ti(N,O)-coated stainless steel in a saline, acidic, and oxidizing environment. An additional coating of 10 nm of hafnium oxide increased corrosion robustness of stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Structural, Optical, Corrosion, and Mechanical Properties of HfO2 Thin Films Deposited Using Pulsed DC Magnetron Sputtering

et al. 2023

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Various properties of HfO2, such as hardness, corrosion, or electrical resistance, depend on the method and the conditions of deposition. In this work, a thorough comparison of scarcely investigated mechanical properties of HfO2 thin films deposited with different conditions of reactive magnetron sputtering process is presented. Four thin films were sputtered in processes that varied in plasma ignition method (continuous or sequential) and target–substrate distance. The structural characteristics of the HfO2 thin films were examined using Raman spectroscopy and X-ray diffraction measurements. Furthermore, the optoelectronic properties were determined based on transmittance and current–voltage characteristics. The mechanical properties of the HfO2 thin films were determined using nanoindentation and scratch test. In turn, the corrosion properties were determined by analyzing the voltametric curves. The transparent HfO2 thin films deposited in the continuous process are characterized by better corrosion resistance than the same layer formed in the sequential process, regardless of the target–substrate distance (8 cm or 12 cm). Furthermore, these samples are also characterized by the highest value of Young’s modulus and scratch resistance. The combination of good corrosion and scratch resistance could contribute to the new application of HfO2 as a corrosion protective material.

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Effects of Film Thickness of ALD-Deposited Al2O3, ZrO2 and HfO2 Nano-Layers on the Corrosion Resistance of Ti(N,O)-Coated Stainless Steel

Cited by 5 publications

References 67 publications

Nanoscience teaching and research program in South Africa

Nanoscience teaching and research program in South Africa

Electrical Resistivity Measurements of Surface-Coated Copper Foils

Characterization of Structural, Optical, Corrosion, and Mechanical Properties of HfO2 Thin Films Deposited Using Pulsed DC Magnetron Sputtering

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