Molecular dynamics simulations of the temperature effect in the hardness on Cr and CrN films

Amaya-Roncancio, S.; Arias-Mateus, D. F.; Gómez-Hermida, Mónica María; Rojas, Juan; Restrepo-Parra, E.

doi:10.1016/j.apsusc.2012.01.009

Cited by 25 publications

(7 citation statements)

References 19 publications

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“…Accordingly, it can be concluded that as the temperature increases the elastic modulus and hardness of the sample decrease. This is consistent with previous work 40,41 that states with the increase of the temperature, the hardness, and elastic modulus decrease.…”

Section: Discussionsupporting

confidence: 94%

Nanoindentation on the bio-inspired high-performance nature composite by molecular dynamics method

Masir

Darvizeh

Zajkani

2019

Advanced Composites Letters

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The determination of mechanical properties at the nanoscale is of such importance today that researchers pay special attention to it. Discovering the mechanical properties of biological composite structures in the nanoscale is much interesting today. Top neck mollusk shells are among biomaterial nanocomposites that their layered structures are composed of organic and inorganic materials. Since the nanoindentation process is known as an efficient method to determine mechanical properties like elastic modulus and hardness in small scale, therefore, due to some limitations of considering all peripheral parameters, particular simulations of temperature effect in the atomic scale are considerable. The present article provides a molecular dynamics approach for modeling the nanoindentation mechanism with three types of pyramidal, cubic, and spherical indenters at different temperatures of 173, 273, 300, and 373°K. Based on load-indentation depth diagrams and Oliver–Pharr equations, research findings indicate that the temperature has weakened the power between the biological atoms; this leads to reduced mechanical properties. An increase in temperature causes a reduction in elastic modulus and hardness. There was correspondence between the results obtained from the spherical indenter and experimental data. This study can be regarded as a novel benchmark study for further research studies which tend to consider structural responses of the various bio-inspired nanocomposites.

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Section: Discussionsupporting

confidence: 94%

Nanoindentation on the bio-inspired high-performance nature composite by molecular dynamics method

Masir

Darvizeh

Zajkani

2019

Advanced Composites Letters

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“…There is little difference of Ph curves among 300 K, 700 K, and 1000 K. However, there is a trend among the forces at different higher temperatures, which is 300 K > 700 K > 1000 K . In other words, all of the P-h curves agree with the previous reports [27,28] that the hardness decreases with the temperature increasing.…”

Section: Indentation Force-depth Curvessupporting

confidence: 91%

Molecular Dynamics Simulation of Nanoindentation of Cu/Au Thin Films at Different Temperatures

Huang

et al. 2016

Journal of Nanomaterials

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Two methods, deposition method and ideal modeling based on lattice constant, are used to prepare three modulation periods’ (1.8 nm Cu/3.6 nm Au, 2.7 nm Cu/2.7 nm Au, and 3.6 nm Cu/1.8 nm Au) thin films for nanoindentation at different temperatures. The results show that the temperature will weaken the hardness of thin films. The deposition method and the formation of coherent interface will result in a lot of defects in thin films. These defects can reduce the residual stress in the thin films which is caused by the external force. The proposed system will provide potential benefits in designing the microstructures for thin films.

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“…Therefore, a thin Cr film is pre-deposited on the surface of CoCrNiSi 0.3 MEA as a buffer layer. The thickness of the Cr buffer layer is 0.9 μm, and its hardness is reported to be about 8.05 GPa [ 32 ]. The sputtering parameters of the Cr buffer layer were set at a working pressure of 0.8 Pa, a bias voltage of −35 V, an Argon input flow rate of 45 sccm, an applied DC power of 100 W, and a sputtering time of 15 min.…”

Section: Methodsmentioning

confidence: 99%

Improvement of Corrosion and Wear Resistance of CoCrNiSi0.3 Medium-Entropy Alloy by Sputtering CrN Film

et al. 2023

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In this study, Co, Cr, and Ni were selected as the equal-atomic medium entropy alloy (MEA) systems, and Si was added to form CoCrNiSi0.3 MEA. In order to further improve its wear and corrosion properties, CrN film was sputtered on the surface. In addition, to enhance the adhesion between the soft CoCrNiSi0.3 substrate and the super-hard CrN film, a Cr buffer layer was pre-sputtered on the CoCrNiSi0.3 substrate. The experimental results show that the CrN film exhibits a columnar grain structure, and the film growth rate is about 2.022 μm/h. With the increase of sputtering time, the increase in CrN film thickness, and the refinement of columnar grains, the wear and corrosion resistance improves. Among all CoCrNiSi0.3 MEAs without and with CrN films prepared in this study, the CoCrNiSi0.3 MEA with 3 h-sputtered CrN film has the lowest wear rate of 2.249 × 10−5 mm3·m−1·N−1, and the best corrosion resistance of Icorr 19.37 μA·cm–2 and Rp 705.85 Ω·cm2.

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Molecular dynamics simulations of the temperature effect in the hardness on Cr and CrN films

Cited by 25 publications

References 19 publications

Nanoindentation on the bio-inspired high-performance nature composite by molecular dynamics method

Nanoindentation on the bio-inspired high-performance nature composite by molecular dynamics method

Molecular Dynamics Simulation of Nanoindentation of Cu/Au Thin Films at Different Temperatures

Improvement of Corrosion and Wear Resistance of CoCrNiSi0.3 Medium-Entropy Alloy by Sputtering CrN Film

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