A Study of the Influence of Thermal Treatment on Hydroxyapatite Coating

Mamaeva, A.; Kenzhegulov, Aidar; Panichkin, A.V.

doi:10.1134/s2070205118030115

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…As can be seen from the friction results without lubrication, the TiAlCN-2 coating has the lowest and most stable CoF compared to the other coatings, indicating that this coating has low friction resistance [ [29][30][31][32]]. In addition, low CoF can be associated with the formation of debris in the wear track, which leads to the subsequent formation of a lubricating transition layer, mainly due to an increase in carbon sp 2 [33].…”

Section: Research Discussionmentioning

confidence: 99%

Microstructure and tribological study of TiAlCN and TiTaCN coatings

Bakhytuly¹,

Kenzhegulov²,

Nurtanto³

et al. 2023

KIMS/CUMR/MShKP

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The low coefficients of friction and wear rates of transition metal carbonitride make them excellent candidates for friction and wear applications. Coatings based on titanium carbonitride alloyed with Ta and Al were deposited using reactive magnetron sputtering on the surface of titanium VT1-0 and steel AISI 304. The effect of alloying titanium carbonitrides with Ta and Al and acetylene flow during deposition on the structure, composition, and tribological properties of the coating was studied. TiAlCN and TiTаCN coatings were deposited in various acetylene flows along with stable argon and nitrogen flows. Scanning electron microscopy, optical microscopy, X-ray phase analysis, and sliding wear test (ball-on-disk method) in two media were used to study the resulting coatings. The average coefficient of friction of the coating under friction without lubrication varied in the range of 0.13-0.85 and under friction with lubrication in the range of 0.0015-0.081. From the point of view of wear rate, it is shown that the most wear-resistant coating under friction conditions with and without lubrication is TiAlCN-2. The resulting coatings can be useful as protection for machine parts or tools that are subject to friction and wear.

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Section: Research Discussionmentioning

confidence: 99%

Microstructure and tribological study of TiAlCN and TiTaCN coatings

Bakhytuly¹,

Kenzhegulov²,

Nurtanto³

et al. 2023

KIMS/CUMR/MShKP

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“…In stomatology, functional-gradient materials are used in dental crowns to imitate the connection of enamel and dentin of natural teeth and to avoid peeling and delamination between the layers [3,4]. Various techniques such as PVD, CVD, and powder metallurgy have been used to produce functional-gradient materials [5][6][7][8]. In addition, functional-gradient materials have also been produced by gas-thermal spraying [9,10].…”

Section: Introductionmentioning

confidence: 99%

Obtaining functional-gradient Ti-HA coatings by detonation spraying

Sagdoldina¹,

Baizhan²,

Kambarov³

et al. 2022

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Functional-gradient titanium/hydroxyapatite (TiHA) coatings were obtained using detonation spraying technology to improve the structure and mechanical properties. To obtain functional-gradient coatings, pulsed energy sources are best suited, namely, detonation spraying, in which the energy of the explosion of gas mixtures is used as a source of pulsed action. By controlling the modes of detonation spraying, it is possible to vary the temperature and rate of coating deposition; accordingly, it is possible to obtain a certain structuralphase structure of the coatings. The structural-phase state and tribological properties of TiHA detonation coatings were investigated by modern materials science methods: X-ray phase analysis (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX-mapping), profilometry and ball-disk wear-resistance test. The results showed that the coatings had a continuously gradient elemental composition across the cross-section of the coatings with no boundary between the elemental layers of the coatings. The amount of Ti gradually decreased and the amount of hydroxyapatite gradually increased in the direction from the substrate to the surface of the coatings, which allows to expand the possibilities of using TiHA-coatings for bone implants. Since the surface layer is composed of HA, the resulting functional-gradient coating demonstrates excellent biocompatibility and the ability to create new bone tissue. The excellent mechanical strength of the functionally graded coatings is ensured by the Ti phase.

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