Effect of Pulsed-Plasma Treatment on the Structural-Phase Composition and Tribological Properties of Detonation Coatings Based on Ti–Si–C

Rakhadilov, Bauyrzhan; Буйткенов, Д.Б.; Idrisheva, Zhanat; Zhamanbayeva, Manira; Pazylbek, S.; Baizhan, Daryn

doi:10.3390/coatings11070795

Cited by 13 publications

(12 citation statements)

References 20 publications

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“…Thus, the high temperature of the plasma discharges leads to the melting of oxides around the discharge channels, followed by rapid cooling with the electrolyte. Then, a rapid change in temper ature causes the appearance of microcracks [15]. Although the average size of micropores in the sample (P) was smaller, and the percentage of porosity was higher compared to the sample (H).…”

Section: Resultsmentioning

confidence: 98%

Research of regimes of applying coats by the method of plasma electrolytic oxidation on Ti-6Al-4V

Rakhadilov¹,

Baizhan²,

Sagdoldina³

et al. 2022

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In this work, ceramic coatings were formed on Ti6Al4V titanium alloy using a technique of plasma electrolytic oxidation. Plasma electrolytic oxidation was carried out in electrolytes with different chemical compositions and the effect of the electrolyte on the macro-and microstructure, pore size, phase composition and wear resistance of coatings was estimated. Three types of electrolytes based on sodium compounds were used, including phosphate, hydroxide, and silicate. The composition of the electrolyte affects the intensity and size of microcharges and the volume of gas release of various electrolytes. The plasma electrolytic oxidation processes were carried out at a fixed voltage (270 V) for 5 minutes. The results showed that the coating was mainly composed of rutile- and anatase TiO2 , but a homogeneous structure with lower porosity and a large number of crystalline anatase phases was obtained in the coating prepared in the silicate-based electrolyte. The diffractogram electrolytes did not reveal the peaks of the crystalline phases associated with the PO4 3— and SiO3 2— anions. This means that these anions included only oxygen in the coatings. The morphology and phase composition of the samples were studied using a scanning electron microscope and an X-ray diffractometer, respectively. Wear resistance was evaluated by the “ball-disc” method on the TRB3 tribometer. The wear resistance of various coatings formed on Ti6Al4V titanium alloys showed completely different wear resistance. The lowest coefficient of friction (µ = 0.3) was demonstrated by the coating obtained based on phosphate. This may be due to a large number of crystal phases of rutile. The sample prepared in a hydroxide-based electrolyte showed a high wear coefficient (µ=0.52). This effect can be obtained by eliminating surface defects (microcracks and micropores).

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Section: Resultsmentioning

confidence: 98%

Research of regimes of applying coats by the method of plasma electrolytic oxidation on Ti-6Al-4V

Rakhadilov¹,

Baizhan²,

Sagdoldina³

et al. 2022

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“…In addition, a possible reason for the decrease in the CoF at −70 V may be an increase in hardness. According to [29,30], a decrease in the friction coefficient correlates with surface hardening. explained by the formation of third bodies in the contact and the subsequent formation of a lubricating transition layer, which is mainly due to the increased carbon sp 2 [27,28].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, a possible reason for the decrease in the CoF at −70 V may be an increase in hardness. According to [29,30], a decrease in the friction coefficient correlates with surface hardening. Tribological tests showed reduced wear in TiCN coatings obtained with substrate bias compared to without voltage coatings.…”

Section: Resultsmentioning

confidence: 99%

Effect of Magnetron Sputtering Deposition Conditions on the Mechanical and Tribological Properties of Wear-Resistant Titanium Carbonitride Coatings

et al. 2022

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In the present work, the titanium carbonitride coatings were deposited by the reactive magnetron sputtering method at different substrate bias: 0, −70 V, and −100 V. The effect of the substrate bias on the structure, composition, and mechanical and tribological properties of titanium carbonitride coatings was studied. Scanning electron microscopy, nanoindentation, sliding wear test (ball-on-disk method), X-ray phase, and elemental analysis methods were used to evaluate the tribological properties and microstructure of the thin coatings. The dependencies obtained resulted in the determination of the most preferred mode of deposition by magnetron sputtering at a negative substrate bias in an atmosphere of argon–acetylene–nitrogen.

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“…This can lead to undesirable overheating or melting of particles and a significant increase in substrate temperature, which is the main limitation of these methods. The GDS method uses a pulsed operating mode [29,30]. This makes it possible to minimize the aforementioned negative consequences.…”

Section: Introductionmentioning

confidence: 99%

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

Baizhan¹,

Rakhadilov²,

Zhurerova³

et al. 2022

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The paper presents study of a new approach to manufacturing carrier implants with a combination of bioactivity, biocompatibility, and mechanical properties, composite powders of hydroxyapatite and titanium with a mass content of 50:50 % when sprayed by gas detonation spraying. Experimental studies of the surface morphology and cross-section microstructure, phase composition and mechanical properties of HATi composite coatings are obtained. The experimental results showed that the cross-section microstructures of HATi composite coatings are typical plate structures comprising curved strips formed by well-deformed and oxidized Ti plates and limited deformed HA plates. Composite coatings’ morphology and phase states were studied using scanning electron microscopy and X-ray diffractometry. It was found that the deprived coatings mainly consist of the phases HA, Ti and TiO. The elemental composition study results designated that the atomic ratio of calcium and phosphorus in the obtained coatings is Ca/P ~ 1.64, which is close to the value of the initial powder — Ca/P ~ 1.67. This indicates a limited change in the chemical composition during the coating formation.

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Effect of Pulsed-Plasma Treatment on the Structural-Phase Composition and Tribological Properties of Detonation Coatings Based on Ti–Si–C

Cited by 13 publications

References 20 publications

Research of regimes of applying coats by the method of plasma electrolytic oxidation on Ti-6Al-4V

Research of regimes of applying coats by the method of plasma electrolytic oxidation on Ti-6Al-4V

Effect of Magnetron Sputtering Deposition Conditions on the Mechanical and Tribological Properties of Wear-Resistant Titanium Carbonitride Coatings

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

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