Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact

Fang, Zhenghan; Chen, Jiao; He, Weifeng; Yang, Zhiming; Yuan, Zhanwei; Geng, Mingrui; He, Guangyu

doi:10.3390/coatings9110765

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…Erosion pits can be observed around the erode center in Figure 14A,C. The high‐magnification SEM image of the craters reveals that many circular cracks are distributed around the craters, as shown in Figure 14B,D, in line with the results reported in the literature 29,30 . These circular cracks are caused by the high ring tensile stress formed when the particles impacted the coating surface.…”

Section: Resultssupporting

confidence: 86%

Improvement of anti‐erosion performance of TiN coatings through using a filtration cathode vacuum arc deposition method

Wang

Chen

et al. 2022

J Am Ceram Soc

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Sand erosion is a major factor that shortens the service life of aircraft in desert regions. The anti-erosion performance of titanium alloys may be improved using TiN coatings. However, few studies have employed Ti sputtering on Ti transition layers to improve the erosion resistance of the coatings. Herein, TiN coatings with a sputtering layer between the Ti transition layer and the TiN layer were deposited on a Ti-6Al-4V alloy by filtered cathodic vacuum arc deposition. For comparison, another group of TiN coatings without a Ti sputtering layer but processed using the same deposition parameters were prepared. The effects of the nanoscale sputtering layer on the microstructure, mechanical properties, and anti-erosion performance of the coatings were investigated using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and nanoindentation. The results show that the introduction of a Ti sputtering layer promoted the growth of TiN grains, leading to the formation of finer and denser TiN columnar grains. The preferred orientation of the coatings with the sputtering layer is (111) plane, whereas that of the coatings without the sputtering layer is (200) plane. The TiN coatings containing a sputtering layer exhibit higher hardness, elastic modulus, and H 3 /E 2 ratio, which enhances the anti-erosion performance of the coatings. The coatings with a sputtering layer exhibited better erosion resistance (erosion rate reduced by 75%) than the coatings without a sputtering layer. The underlying mechanism to understand the effect of the sputtering layer on the erosion resistance was discussed based on variations in the microstructure and mechanical properties of the coatings with and without the Ti sputtering layer. Ti sputtering layer was finally proved to be an effective method to improve the erosion resistance of TiN coatings.

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Section: Resultssupporting

confidence: 86%

Improvement of anti‐erosion performance of TiN coatings through using a filtration cathode vacuum arc deposition method

Wang

Chen

et al. 2022

J Am Ceram Soc

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“…Multilayer coatings can be divided into ceramicmetallic coatings, e.g., TiN/Ti coatings, or ceramic-ceramic coatings, e.g., CrN/CrCN coatings. Ceramic-metallic coatings have usually lower hardness and Young's modulus than ceramic-ceramic Similarly to cavitation erosion investigations, erosion rate of the coatings depends on many factors that are related to coating properties (hardness, elastic modulus, ratio of hardness to elastic modulus, total coating thickness, number and thickness of layers in multilayer coating, residual stress), substrate properties and test conditions (type and size of solid particles as well as angle and velocity of impacts) [82,[110][111][112][113].…”

Section: Resistance Of Pvd Coatings To Solid Particle Erosionmentioning

confidence: 99%

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Krella

2020

Coatings

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Due to the increasing maintenance costs of hydraulic machines related to the damages caused by cavitation erosion and/or erosion of solid particles, as well as in tribological connections, surface protection of these components is very important. Up to now, numerous investigations of resistance of coatings, mainly nitride coatings, such as CrN, TiN, TiCN, (Ti,Cr)N coatings and multilayer TiN/Ti, ZrN/CrN and TN/(Ti,Al)N coatings, produced by physical vapor deposition (PVD) method using different techniques of deposition, such as magnetron sputtering, arc evaporation or ion plating, to cavitation erosion, solid particle erosion and wear have been made. The results of these investigations, degradation processes and main test devices used are presented in this paper. An effect of deposition of mono- and multi-layer PVD coatings on duration of incubation period, cumulative weight loss and erosion rate, as well as on wear rate and coefficient of friction in tribological tests is discussed. It is shown that PVD coating does not always provide extended incubation time and/or improved resistance to mentioned types of damage. The influence of structure, hardness, residence to plastic deformation and stresses in the coatings on erosion and wear resistance is discussed. In the case of cavitation erosion and solid particle erosion, a limit value of the ratio of hardness (H) to Young’s modulus (E) exists at which the best resistance is gained. In the case of tribological tests, the higher the H/E ratio and the lower the coefficient of friction, the lower the wear rate, but there are also many exceptions.

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“…To evaluate the toughness and explore the effect of modulation ratio on the crack resistance of the gradient bias TiN/Ti coatings, single solid particle impact tests were conducted using an air gun experimental system. The system accelerates the ball-shaped particles to impact the coatings at set erosion velocities and angles, and the details of the equipment are provided in a previous study [18]. The particles used in the tests were GCR15 spherical particles of approximately 0.8 mm diameter.…”

Section: Methodsmentioning

confidence: 99%

Crack resistance enhancement of gradient bias TiN/Ti multilayer coating by Ti sputtering

Fang

Chen

et al. 2021

Surface Engineering

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In this study, monolayer TiN and multilayer TiN/Ti coatings involving different modulation ratios were deposited on Ti-6Al-4V substrate. Ti interlayers in the multilayer TiN/Ti coatings were prepared under gradient negative bias of -800, -600, and -400 V, with corresponding durations of 2, 2, and 1 min. Mechanical properties and crack' s resistance of the coatings were explored. Damage morphology of coating cross-section was characterized by the focused ion beam (FIB) method. Finite element modelling was used to analyse the stress field. Multilayer TiN/Ti coatings show better impact resistance than monolayer TiN coating. Tensile stress decrease with the increase of interfaces. Gradient bias Ti interlayers restrain crack propagation by cracks deflection and branch. Erosion resistance was evaluated by sand erosion test. Crack propagation and connection account for the coatings failure: the deeper the crack propagation, the higher the erosion rate.

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Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact

Cited by 13 publications

References 31 publications

Improvement of anti‐erosion performance of TiN coatings through using a filtration cathode vacuum arc deposition method

Improvement of anti‐erosion performance of TiN coatings through using a filtration cathode vacuum arc deposition method

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Crack resistance enhancement of gradient bias TiN/Ti multilayer coating by Ti sputtering

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