Mechanical properties of 2D materials: A review on molecular dynamics based nanoindentation simulations

Patra, Lokanath; Pandey, Ravindra

doi:10.1016/j.mtcomm.2022.103623

Cited by 20 publications

(13 citation statements)

References 116 publications

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“…When these two positions overlap, the coating with poor forming quality in that area will be damaged. Figure 5 is a schematic diagram of the theoretical structure of the microscratch experiment [18]; cohesive or adhesion failure of hard ceramic coatings may occur under the linearly increasing pressure load of the diamond stylus. Figure 6 shows the SEM and signal diagram of the coating scratch.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Figure 6 shows the SEM and signal diagram of the coating scratch. The compressive stress damaged the surface of the coating, but there was no separation or complete separation from the substrate due to Figure 5 is a schematic diagram of the theoretical structure of the microscratch experiment [18]; cohesive or adhesion failure of hard ceramic coatings may occur under the linearly increasing pressure load of the diamond stylus. Figure 6 shows the SEM and signal diagram of the coating scratch.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Combined with the signal diagram, we found the critical pressure load of the coating microscratch test was 7.13 ± 1.03 N, and the fundamental adhesion force was 25.14 ± 2.21 MPa. Figure 5 is a schematic diagram of the theoretical structure of the microscratch experiment [18]; cohesive or adhesion failure of hard ceramic coatings may occur under the linearly increasing pressure load of the diamond stylus. Figure 6 shows the SEM and signal diagram of the coating scratch.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Properties of Ceramic Coating on Heating Surface of Waste Incineration Boiler Prepared by Slurry Method

Wei

Liang

2022

Materials

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In order to alleviate the problem of high-temperature fly ash corrosion and slag on the heating surface of a high-parameter waste incinerator, a ceramic coating material that can be prepared in situ on the heating surface by the slurry method was studied. The ceramic coating can be formed by sintering at a lower temperature of 750 °C. Its surface and profile are very dense, and the porosity is less than 1%. The mechanical properties test results show that the ceramic coating can withstand 60 cycles of water-cooled thermal shock at 700 °C, and the bonding strength is 25.14 ± 2.21 MPa. It will not fall off in a large area when subjected to pressure load, and it has a certain degree of processable plasticity. High-temperature wettability experiments show that the ceramic coating has lower liquid-bridge force, smaller adhesion area, and shorter fouling cycle for molten corrosive fouling, and potential self-cleaning properties. Its practical mechanical properties make the coating valuable for production applications and meet expectations, and excellent antifouling properties to reduce average fouling thermal resistance and corrosion.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

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Properties of Ceramic Coating on Heating Surface of Waste Incineration Boiler Prepared by Slurry Method

Wei

Liang

2022

Materials

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“…In this work, a new STM sample holder has been developed for subjecting 2D crystals to controllable strain and gating. Its working principle is based on the nanoindentation method 2 , 38 (Fig. 1 ).…”

Section: Introductionmentioning

confidence: 99%

“…Our method exploited the advantages and simplicity of well-established nanoindentation methods, which have been successfully applied in a number of previous studies on 2D materials 2 , 37 , 38 , 40 , 41 . The advantages of our method include: (a) Using a piezoelectric actuator, the indentor height can be controlled with a precision of <1 nm.…”

Section: Introductionmentioning

confidence: 99%

In-situ atomic level observation of the strain response of graphene lattice

Juo

Shin

Stiepany

et al. 2023

Sci Rep

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Strain is inevitable in two-dimensional (2D) materials, regardless of whether the film is suspended or supported. However, the direct measurement of strain response at the atomic scale is challenging due to the difficulties of maintaining both flexibility and mechanical stability at low temperature under UHV conditions. In this work, we have implemented a compact nanoindentation system with a size of $$\sim $$ ∼ 160 mm$$^2$$ 2 $$\times $$ × 5.2 mm in a scanning tunneling microscope (STM) sample holder, which enables the reversible control of strain and gate electric field. A combination of gearbox and piezoelectric actuator allowed us to modulate the depth of the indentation continuously with nanometer precision. The 2D materials were transferred onto the polyimide film. Pd clamp was used to enhance the strain transfer from the polyimide from to the 2D layers. Using this unique technique, strain response of graphene lattice were observed at atomic precision. In the relaxed graphene, strain is induced mainly by local curvature. However, in the strained graphene with tented structure, the lattice parameters become more sensitive to the indentor height change and stretching strain is increased additionally. Moreover, the gate controllability is confirmed by measuring the dependence of the STM tip height on gate voltage.

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Emerging Multifunctionality in 2D Ferroelectrics: A Theoretical Review of the Interplay With Magnetics, Valleytronics, Mechanics, and Optics

Zhang,

Guo,

Zhu

et al. 2024

Adv Funct Materials

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Abstract2D ferroelectric materials present promising applications in information storage, sensor technology, and optoelectronics through their coupling with magnetics/valleytronics, mechanics, and optics, respectively. The integration of 2D ferroelectrics with magnetism enhances data storage density in memory devices by enabling electric‐field‐controlled magnetic states. Ferroelectric‐valley coupling holds promise for high‐speed, low‐energy electronics by leveraging the electrical control of valley polarization. Ferroelectric‐strain coupling results in various polar topologies, with potential applications in high‐density data storage technologies and sensor devices. Moreover, the coupling between ferroelectrics and optics facilitates the development of nonlinear photonics based on ferroelectric materials. This review summarizes the latest theoretical progress in the coupling mechanisms, including the Dzyaloshinskii‐Moriya‐interaction‐induced magnetoelectric coupling, symmetry‐linked ferroelectric‐valley coupling, ferroelectric‐strain‐coupling‐generated polar topologies, and second‐harmonic generation through ferroelectric‐light interactions. The current challenges and future opportunities in harnessing the coupling in 2D ferroelectric materials for multifunctional applications are provided.

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Mechanical properties of 2D materials: A review on molecular dynamics based nanoindentation simulations

Cited by 20 publications

References 116 publications

Properties of Ceramic Coating on Heating Surface of Waste Incineration Boiler Prepared by Slurry Method

Properties of Ceramic Coating on Heating Surface of Waste Incineration Boiler Prepared by Slurry Method

In-situ atomic level observation of the strain response of graphene lattice

Emerging Multifunctionality in 2D Ferroelectrics: A Theoretical Review of the Interplay With Magnetics, Valleytronics, Mechanics, and Optics

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