High velocity erosion of CVD diamond coatings by diamond particles

Wheeler, D.W.; Wood, R.J.K.

doi:10.1016/j.diamond.2018.02.007

Cited by 7 publications

(5 citation statements)

References 42 publications

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Section: Erosion Mechanism Of the Coatingmentioning

confidence: 59%

“…Under repeated erosion by sand, the cracks continue to expand and connect, eventually leading to coating detachment. Wheeler et al [7] reported similar results in the case of diamond coatings deposited by chemical vapor evaporation. To understand the influence of the peeling off behavior of the coatings on the erosion resistance, the sectional morphology of the coating erosion zone was observed by SEM.…”

Section: Erosion Mechanism Of the Coatingmentioning

confidence: 59%

“…Titanium alloys are used in the aviation industry because of their low density, high specific strength, and corrosion resistance; however, the damage problem of sand erosion is prominent on titanium alloy blades [5]. In initial studies, transition metal nitrides exhibited great application potential in solid particle erosion resistance [2,[6][7][8]. In recent studies, single-layer nitride coatings with high hardness were commonly used to resist solid particle erosion [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Erosion Resistance and Damage Mechanism of TiN/ZrN Nanoscale Multilayer Coating

Chen

Geng

et al. 2019

Coatings

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Ceramic coating is an effective method for improving the erosion resistance of a material, particularly for titanium alloys. In this study, a TiN/ZrN (ceramic/ceramic) nanoscale multilayer coating is designed and prepared on the Ti6Al4V titanium alloy surface by the physical vapor deposition (PVD) process. The cross-sectional microstructure and phase composition are measured using SEM and XRD, respectively. The hardness, elastic modulus, and adhesion of the coating are measured by the nano-indentation and scratch method. The erosion test is conducted at a 45° angle with 100 m/s velocity using self-developed erosion equipment. The erosion resistance mechanisms of both the substrate and the coating are revealed more intuitively through a single sand particle impact test. The results show that the erosion resistance rate of the coating is 15.5 times higher than that of the titanium alloy substrate. The damage mechanisms of material removal of the coating include crack deflection, crack branching, and succeeding interaction between them when suffering an impacting load. These cracks are started from the droplets and the stress concentrations on the coating surface during the preparation of coating. They are the primary reasons for the decrease in the erosion resistance of the coating. This research is important for the optimization of the erosion-resistant coating structure.

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Section: Erosion Mechanism Of the Coatingmentioning

confidence: 59%

Section: Erosion Mechanism Of the Coatingmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

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Erosion Resistance and Damage Mechanism of TiN/ZrN Nanoscale Multilayer Coating

Chen

Geng

et al. 2019

Coatings

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“…The behaviors of the DLC films under impact are different from the observations of macroscale brittle coatings such as diamond and ceramics which have the erosion mechanisms dominated by the lateral and radial cracks when the hardness of the particle is higher than that of these coatings. [13,24,25] The differences should come from that these materials show different energy dissipation approaches. The brittle coatings show an efficient way to release the impact energy by forming cracks.…”

Section: Resultsmentioning

confidence: 99%

“…Wheeler et al reported that the diamond coatings show radial and lateral cracks under the impact of diamond particles and the coating removal is caused by the intersection of such cracks. [13] Grogler et al demonstrated that the diamond coatings exhibit exceptional resistance to erosions compared with TiN and TiAlN coatings. [14] It has been proved that the erosion rate of materials is directly related with their mechanical strengths.…”

Section: Introductionmentioning

confidence: 99%

Particle‐Induced Erosional Behaviors of Diamond‐Like Carbon Films

Fan

Bai

2021

Physica Rapid Research Ltrs

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Particle‐induced erosion is an important form of materials wear. The erosion mechanism lacks good understanding due to the limitation of experimental techniques to characterize the fast impact process between particle and materials. Herein, the particle‐induced erosion of diamond‐like carbon (DLC) films is investigated using molecular dynamics simulations. It is found that the impact process shows an evident fluctuation. The impact energy is mainly absorbed during the first fluctuation period, and the fluctuations in other periods are dominated by elastic deformations. The energy absorbed in the first period shows a linear relation with the maximum material loss, and such relation indicates that there exists a threshold vertical impact velocity to initiate the loss of DLC films, which is due to the initiation of their plastic deformation. The maximum impact force shows a linear dependence on the impact velocity, attributed to the structural changes of DLC films. Moreover, the DLC films show large volume loss with both impact angles of 90° and 45°, indicating that these films exhibit both brittle and ductile impact behaviors due to their specific structural changes. These results can help to uncover the erosional behaviors of DLC films and elucidate the particle‐induced erosion mechanisms at the nanoscale.

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