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Influence of irradiation doses on the mechanical and tribological properties of polyetheretherketone exposed to electron beam treatment

Rakhadilov Bauyrzhan, Ormanbekov Kuanysh, Zhassulan Ainur, Andybayeva Gaukhar, Shynarbek Aibek, Mukhametov Yeldos

Advances in Science and Technology. Research Journal

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2025

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Vol. 19, no. 1

121--131

EN

This study investigates the effects of electron beam irradiation on the mechanical and tribological properties of polyetheretherketone (PEEK), with particular focus on modifications resulting from the application of Litol-24 lubricant. Samples of pre-treated PEEK were irradiated at doses of 100, 200, 400, and 600 kGy using the ILU-10 linear accelerator. Comprehensive analyses were conducted, including thermogravimetric analysis (TGA) to assess thermal stability, X-ray diffraction (XRD) to observe structural changes, and the impact of irradiation on microhardness. Tribological performance was evaluated using the ball-on-disc method. Results indicate that irradiation decreases microhardness by approximately 19% and modifies tribological behavior in a dose-dependent manner. TGA results showed subtle shifts in decomposition onset temperatures, with a reduction of about 10°C post-irradiation, while XRD revealed a 12% decrease in crystallinity, affecting mechanical properties. Further investigations demonstrated that lubrication, particularly under high-load conditions, could enhance PEEK’s operational characteristics post-irradiation. The study underscores the critical role of lubricants in improving the wear resistance and durability of PEEK, making it suitable for high-stress applications in mechanical engineering and manufacturing sectors. The analysis highlights the potential of integrating electron irradiation into existing material processing workflows to improve PEEK's properties, thereby extending its utility across various industrial applications. This approach offers a promising avenue for optimizing the performance and longevity of PEEK components, particularly in environments subject to extreme mechanical stresses.

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Influence of high-speed arc metallization wire feed rate on tribological and corrosion properties of 30HGSA steel coatings

Rakhadilov Bauyrzhan, Shynarbek Aibek, Kakimzhanov Dauir, Muktanova Nazerke, Kusainov Rinat

Materials Science Poland

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2024

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Vol. 42, No. 3

171--180

EN

This study investigates the influence of wire feed rate on the porosity of coatings, elemental analysis, corrosion resistance, tribological properties, and microstructure of iron-based coatings deposited by high-speed arc metallization. The coatings were obtained using a SX-600 high-speed electric arc metallizer. The properties of Fe-based coatings depend on the arcsputtering parameters. Determination of the optimum arc spraying parameters helps to minimize the deterioration of coating properties. Increasing the wire feed speed leads to an increase in the current value, which generates more heat energy in the arc to melt the wire and consequently favours the formation of dense coatings with low porosity. At high temperatures, Fe-based coatings form oxide deposits that protect the coating from further oxidation and increase coating hardness. Tribological tests show that the friction coefficient of coatings decreases in the presence of FeO on the coating surface, activating its self-lubricating ability. Investigation of the porosity of the samples showed that adjusting the wire feed affected both the pore size and the number of pores.

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Effect of Voltage on Properties of 30HGSA Steel Coatings by Supersonic Supersonic arc Metallization Method

Rakhadilov Bauyrzhan, Shynarbek Aibek, Kakimzhanov Dauir, Kusainov Rinat, Zhassulan Ainur, Ormanbekov Kuanysh

Advances in Science and Technology. Research Journal

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2024

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Vol. 18, no. 5

113--124

EN

This work is a study aimed at optimizing the process of superarc metallization, with a focus on the effect of stress on the properties of the spraying coatings. In this work, 30HGSA grade steel wire was used for the coating of 45 steel, widely used in mechanical engineering. The use of supersonic arc metallizer SX-600 allowed to obtain coatings at different voltages (32 V, 38 V and 44 V) and the same current strength. Various metallization process parameters such as material feed rate, voltage, current, distance and nozzle geometry are discussed in this paper. Using various analytical techniques including X-ray diffraction analysis, microscopy, microhardness and corrosion resistance tests, the qualities of the coatings were evaluated. Particular attention was paid to analyzing the phase composition of the coatings, porosity, substrate bond strength and tribological characteristics. It was found that the voltage during the electric arc metallization process has a significant effect on these characteristics. The selected optimum voltage allows to obtain dense and homogeneous coatings with improved performance properties. The results of the study revealed that the best physical and mechanical properties were exhibited by the sample processed at 38 V, which showed lower porosity and improved strength characteristics compared to the other samples. These findings can be used to improve manufacturing processes in industries such as automotive and mechanical engineering, where restoration and improved performance of worn parts is required.

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Physico-mechanical properties, structure, and phase composition of (BeO + TiO2)-ceramics containing TiO2 nanoparticles (0.1–2.0 wt.%)

Pavlov Alexandr, Sagdoldina Zhuldyz, Kassymov Askar, Seitkanova Ainur, Rakhadilov Bauyrzhan, Kengesbekov Aidar

Materials Science Poland

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2021

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Vol. 39, No. 4

626--638

EN

This research studies the effects of addition of micro- and nanoparticles of TiO2 and variations in the firing temperature on the physico-mechanical properties of oxide-beryllium ceramics, shows the evolution of the microstructure of such ceramics during sintering, and presents the data of X-ray phase analysis. It was shown that the addition of TiO2 nanoparticles leads to a higher density of the ceramic material after sintering due to the interpenetration of TiO2 and BeO phases, which is caused by an increase in the diffusion mobility of atoms that can in turn be attributed to an increase in the imperfection of the structure and the fraction of grain boundaries. It was found that the presence of nanoparticles contributes to an increase in the apparent density of the material, as well as a decrease in its total and closed porosity; and an increase in the sintering temperature contributes to the transformation of the crystalline structure of TiO2 into a more conductive Ti3O5with an orthorhombic structure. The presence of nanoparticles also promotes self-healing of micropores, which can be explained by the blocking of a certain fraction of the interfaces between BeO particles by nanoparticles and the creation of a diffusion barrier.