Development of a Model of Crack Propagation in Multilayer Hard Coatings under Conditions of Stochastic Force Impact

Vereschaka, Alexey; Grigoriev, Sergey N.; Чигарев, А. В.; Milovich, Filipp; Sitnikov, Nikolay; Andreev, Nikolay; Sotova, Catherine; Bublikov, Jury

doi:10.3390/ma14020260

Cited by 12 publications

(5 citation statements)

References 56 publications

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“…The low values of this ratio for the ternary CrTiN and quaternary coatings could be explained with the Ti content in their composition. Thus titanium increases their hardness, but also makes them brittle and lowers their resistance to crack formation [43]. The Cr to Ti ratio in these structures could also influence the crack formation mechanisms [44].…”

Section: Resultsmentioning

confidence: 99%

Elastic-Plastic Properties of hard Cr-Based Nitride Coatings Deposited at Temperatures Below 200°C

Chitanov,

Zlatareva,

Kolaklieva

et al. 2023

Tribol. Ind.

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Sets of Cr-based hard coatings were prepared via reactive closed field unbalanced magnetron sputtering (CFUBMS). Substrate temperature was kept in range of 150 to 200 ⁰C during deposition. Nanohardness (H) and effective modulus of elasticity (E * ) of the coatings were examined, using depth-sensing indentation method. In order to present the mechanical properties and predict the tribological behaviour of the prepared coatings ratios H/E* (elasticity index), H 3 /E *2 (resistance to plastic deformation) and 1/(HE *2 ) (resistance to crack formation) were calculated and analysed. The results from the combined examination of the research ratios showed that they could be used for classification of the expected wear-resistant properties of Cr-based hard coatings deposited at temperature below 200 ℃.

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Section: Resultsmentioning

confidence: 99%

Elastic-Plastic Properties of hard Cr-Based Nitride Coatings Deposited at Temperatures Below 200°C

Chitanov,

Zlatareva,

Kolaklieva

et al. 2023

Tribol. Ind.

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“…In turn, the number of bonds is determined by the area of actual contact between the coating and the substrate (titanium alloy), which decreases in the presence of numerous grooves and irregularities. In addition, the irregular formation of coatings in depressions and protrusions can serve as crack nucleators and preferential locations for coating destruction [86].…”

Section: Discussionmentioning

confidence: 99%

Influence of Cr-Al-Si-N and DLC-Si Thin Coatings on Wear Resistance of Titanium Alloy Samples with Different Surface Conditions

Volosova,

Lyakhovetsky,

Mitrofanov

et al. 2023

Coatings

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The influence of Cr-Al-Si-N, DLC-Si, and Cr-Al-Si-N/DLC-Si thin coatings deposited on titanium alloy (Ti-Al-Zr-Sn-Nb system) samples with different surface reliefs on wear resistance under abrasion and fretting conditions was investigated. The influence of coatings on the initial microrelief after finishing milling and lapping with micro-grained abrasive was studied by profilometry. The Martens hardness (H) and the elastic modulus (E) were determined through nanoindentation. The H/E ratio was 0.08, 0.09, and 0.13, respectively. The adhesion bond strength and H/E ratio relationship was revealed using a scratch testing analysis. Volumetric wear after 20 min of abrasive exposure was reduced by 11, 25, and 31 times for Cr-Al-Si-N, DLC-Si, and Cr-Al-Si-N/DLC-Si coatings compared to uncoated ones after milling and by 15, 32, and 35 times after lapping. Volumetric wear under fretting conditions was reduced by 1.8 and 4 times for Cr-Al-Si-N coating after milling and lapping. It was reduced by tens of times for DLC-Si coating and by hundreds of times for Cr-Al-Si-N/DLC-Si coating. The Cr-Al-Si-N/DLC-Si coating (a thickness of 3.1 ± 0.15/2.0 ± 0.1 µm) is characterized by the best combination of hardness (24 ± 1 GPa), elastic modulus (185 ± 8 GPa), and friction coefficient (0.04–0.05 after milling and 0.1 after lapping) and ensures maximum wear resistance under a wide range of loads. The novelty of the work is that those coatings were not practically under study concerning the deposition on the titanium alloy regarding typical mechanical loads such as abrasive and fretting wear but are of interest to the aviation and aerospace industry.

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“…Vacuum arc coating (cathodic arc deposition; physical coating deposition (PVD)) [292,299,[312][313][314][315][316][317] The formation of coatings is carried out in vacuum. It is used for the deposition of metal, ceramic, and composite coatings on substrates made of various materials (including low-heat-resistant (up to 200 • C)).…”

Section: Physical Techniquesmentioning

confidence: 99%

Dental Implants: Modern Materials and Methods of Their Surface Modification

Sotova,

Yanushevich,

Kriheli

et al. 2023

Materials

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The development of dental implantology is based on the detailed study of the interaction of implants with the surrounding tissues and methods of osteogenesis stimulation around implants, which has been confirmed by the increasing number of scientific publications presenting the results of studies related to both the influence of the chemical composition of dental implant material as well as the method of its surface modification on the key operational characteristics of implants. The main materials for dental implant manufacturing are Ti and its alloys, stainless steels, Zr alloys (including ceramics based on ZrO2), and Ta and its alloys, as well as other materials (ceramics based on Al2O3, Si3N4, etc.). The review presents alloy systems recommended for use in clinical practice and describes their physical–mechanical and biochemical properties. However, when getting into the body, the implants are subjected to various kinds of mechanical influences, which are aggravated by the action of an aggressive biological environment (electrolyte with a lot of Cl− and H+); it can lead to the loss of osteointegration and to the appearance of the symptoms of the general intoxication of the organism because of the metal ions released from the implant surface into the biological tissues of the organism. Since the osteointegration and biocompatibility of implants depend primarily on the properties of their surface layer (it is the implant surface that makes contact with the tissues of the body), the surface modification of dental implants plays an important role, and all methods of surface modification can be divided into mechanical, physical, chemical, and biochemical methods (according to the main effect on the surface). This review discusses several techniques for modifying dental implant surfaces and provides evidence for their usefulness.

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Development of a Model of Crack Propagation in Multilayer Hard Coatings under Conditions of Stochastic Force Impact

Cited by 12 publications

References 56 publications

Elastic-Plastic Properties of hard Cr-Based Nitride Coatings Deposited at Temperatures Below 200°C

Elastic-Plastic Properties of hard Cr-Based Nitride Coatings Deposited at Temperatures Below 200°C

Influence of Cr-Al-Si-N and DLC-Si Thin Coatings on Wear Resistance of Titanium Alloy Samples with Different Surface Conditions

Dental Implants: Modern Materials and Methods of Their Surface Modification

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