Preparation of bio-ceramic composite coatings on Ti6Al4V titanium alloy by gas-detonation spraying

Baizhan, Daryn; Rakhadilov, B.K.; Zhurerova, L.G.; Torebek, Kyztore

doi:10.31489/2022ph1/89-98

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…Coatings on the basis of titanium (Ti) were applied on a substrate VT1-0 by means of the detonation complex CCDS2000 (Computer Controlled Detonation Spraying, manufactured by LLC INOX, Novosibirsk, Russia) in the Research Center "Surface Engineering and Tribology" of Sarsen Amanzholov EKU. Detonation set consists of a detonation gun, powder dispensers, a gauge panel, a control unit, a cooling system, and a system of manipulation with both the gun and the part [21]. A schematic diagram of the detonation spraying process is shown in Figure 1.…”

Section: Spraying Methods and Characteristicsmentioning

confidence: 99%

Synthesis and Formation Mechanism of Metal Oxide Compounds

et al. 2022

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In this work, the influence of the technological parameters of the detonation method on the formation of metal oxide compounds on the basis of titanium was investigated. The aim of the work was to investigate the method of the effective control of the phase composition and microstructure of titanium-based coatings during detonation spraying. The main parameters that varied in detonation spraying were the volume of filling the detonation barrel with explosive mixture and the oxygen/fuel ratio. The mechanism of formation of the gradient structure of coatings based on metal oxide compounds depending on the technological parameters of detonation spraying was considered. The structural-phase states and tribological properties of detonation coatings were investigated by the following methods: X-ray phase analysis (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX-mapping), profilometry, and the test for wear-resistance according to the “ball-disk” scheme. It is shown that the phase composition of coatings may significantly change relative to the initial titanium powder during the detonation spraying due to the interaction of particles of powders with components of the gas atmosphere. Varying the spraying parameters may control the chemical reaction and provide conditions for the synthesis of the desired phases in the coatings (titanium oxide TiO2 and Ti2O3).

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Section: Spraying Methods and Characteristicsmentioning

confidence: 99%

Synthesis and Formation Mechanism of Metal Oxide Compounds

et al. 2022

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“…During detonation combustion of a mixture of gases, propane and oxygen, the powder particles are affected by elevated temperatures, pressures and acceleration. The calculated temperature in the channel reaches 3000 K and the pressure is 5 MPa [22,23]. At the beginning of the process, the gas powder cloud reaches a velocity of 1500 m/s, and then slightly melted powder particles are moved to the substrate at a velocity of up to 1000 m/s.…”

Section: Methodsmentioning

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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Preparation of bio-ceramic composite coatings on Ti6Al4V titanium alloy by gas-detonation spraying

Cited by 2 publications

References 33 publications

Synthesis and Formation Mechanism of Metal Oxide Compounds

Synthesis and Formation Mechanism of Metal Oxide Compounds

Obtaining functional-gradient Ti-HA coatings by detonation spraying

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