Role of atomic layer deposited solid lubricants in the sliding wear reduction of carbon–carbon composites at room and higher temperatures

Mohseni, H.; Scharf, Thomas

doi:10.1016/j.wear.2015.01.061

Cited by 11 publications

(4 citation statements)

References 30 publications

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“…Earlier studies related to friction and wear of ALD coatings include, e.g., ZnO, WS 2 , and Zn x Ti y O z with mainly Si 3 N 4 used as counterpart. [22][23][24][25][26] It is also claimed 27,28 that the ALD Al 2 O 3 coating deposited at 50 C does not form a tribolayer during sliding contact resulting in a low friction coefficient.…”

Section: Introductionmentioning

confidence: 99%

Tribological properties of thin films made by atomic layer deposition sliding against silicon

Kilpi

Ylivaara

Vaajoki

et al. 2017

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Interfacial phenomena, such as adhesion, friction, and wear, can dominate the performance and reliability of microelectromechanical (MEMS) devices. Here, thin films made by atomic layer deposition (ALD) were tested for their tribological properties. Tribological tests were carried out with silicon counterpart sliding against ALD thin films in order to simulate the contacts occurring in the MEMS devices. The counterpart was sliding in a linear reciprocating motion against the ALD films with the total sliding distances of 5 and 20 m. Al 2 O 3 and TiO 2 coatings with different deposition temperatures were investigated in addition to Al 2 O 3-TiO 2-nanolaminate, TiN, NbN, TiAlCN, a-C:H [diamondlike carbon (DLC)] coatings, and uncoated Si. The formation of the tribolayer in the contact area was the dominating phenomenon for friction and wear performance. Hardness, elastic modulus, and crystallinity of the materials were also investigated. The nitride coatings had the most favorable friction and wear performance of the ALD coatings, yet lower friction coefficient was measured with DLC a-C:H coating. These results help us to take steps toward improved coating solutions in, e.g., MEMS applications.

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Section: Introductionmentioning

confidence: 99%

Tribological properties of thin films made by atomic layer deposition sliding against silicon

Kilpi

Ylivaara

Vaajoki

et al. 2017

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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“…The 8Cr4Mo4V alloy, due to its outstanding mechanical properties and thermal stability, is currently widely used as the main bearings materials of aeroengines 8 . The macroscopic failure modes of aeroengine bearings typically include fatigue [9][10][11][12] , creep 13 , and wear [14][15][16] . Fatigue failure is caused by the formation and propagation of microcracks within the material under stress 12,17,18 .…”

Section: Introductionmentioning

confidence: 99%

Multi-scale analysis method for crack damage in 8Cr4Mo4V alloys

Cao,

Ma,

Gong

et al. 2024

Preprint

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8Cr4Mo4V, as an ideal choice for aeroengines bearing materials, involves multi-scale damage mechanisms of the fatigue crack failures. Herein, we propose a multi-scale analysis method to analyze the crack initiation and propagation damage mechanisms of 8Cr4Mo4V alloy. We find that different crystal orientations produce distinctly different damage mechanisms. The second phase doping also has different strengthening effects on the matrix following bypass and cut-through mechanisms. Meanwhile, the study of the polycrystalline model verified the micro-scale inverse Hall-Petch relation, where material strength decreases with grain refinement. Phase transitions caused by dislocations lead to stress concentration at specific grain boundaries, becoming the main inducer for the nucleation of initial voids. To address micro-to-macroscale-crossing issues, we constructed a large-scale mesoscopic molecular dynamics simulation and proposed an analytical formula to predict the relationship between average grain size and yield stress. Finally, we combine macroscopic experiments, crystallographic analyses, and atomic-scale characterization, verifying the combined action of dislocations and stacking faults leads to the failure of the material.

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“…There is no prior research on the use of 2D TMOs for solid lubrication. The main reasons include the difficulty in their scalable synthesis, as well as potential issues for lubrication such as high hardness and low adhesion [23,24]. Based on their atomically thin morphology and highly tunable composition and properties, it is hypothesized that such 2D TMOs and their composites can be excellent candidates for high-performance solid lubricants [25,26].…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional iron oxide/graphene-based nanocomposites as high-performance solid lubricants

Kasbe,

Yang,

Bosch

et al. 2024

2D Mater.

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Beyond conventional 2D layered materials such as graphene and transition metal dichalcogenides, 2D metal oxides have also received much interest in recent years. They have unique electronic (such as 2D TiO2 and MoO2), catalytic (such as 2D CeO2 and MnO2), and magnetic properties (such as 2D Fe2O3) compared with bulk metal oxides due to their atomically thin structures. Certain types of 2D metal oxides also have the potential to be a new type of high-performance solid lubricants due to the tunable interlayer interaction and possibility for 2D heterostructure formation, but this remains largely unexplored. In this work, we developed a scalable microwave-assisted solid-state synthesis of 2D Fe2O3 and their nanocomposites with reduced graphene oxide (rGO). The 2D Fe2O3/rGO nanocomposites were systematically characterized by electron microscopies and spectroscopies, and their utilization as solid lubricants was studied by pin-on-disk tribometer on both silicon and steel substrates. The results show that due to the easy sliding between 2D Fe2O3 and rGO nanosheets and their unique magnetic-induced assembled morphology, low coefficient of friction (COF) can be achieved for both steel-silicon and steel-steel interfaces. Superlubricity (COF ∼ 0.007) can be achieved for the 2D Fe2O3/rGO nanocomposite with a GO primer layer on a steel substrate. This work provides new insights into the development of functional 2D nanocomposites and expands their applications to solid lubrication and beyond.

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Role of atomic layer deposited solid lubricants in the sliding wear reduction of carbon–carbon composites at room and higher temperatures

Cited by 11 publications

References 30 publications

Tribological properties of thin films made by atomic layer deposition sliding against silicon

Tribological properties of thin films made by atomic layer deposition sliding against silicon

Multi-scale analysis method for crack damage in 8Cr4Mo4V alloys

Two-dimensional iron oxide/graphene-based nanocomposites as high-performance solid lubricants

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