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Comparative Study of Wear Resistance of the Composite with Microhybrid Structure and Nanocomposite

Abstract

The aim of the study was to compare microhardness and wear resistance of ceramic-polymer composites with micro and nano-hybrid structure. For the studies commercial composites were used, containing filler particles of the same type but different sizes, nano-sized (Filtek Ultimate) and micro-sized (Filtek Z250) composites. Tribological testing was conducted using ball-on-disc micro-tribometer. Vickers testing method was applied for microhardness studies with the use of Futertech FM 700 device. It has been demonstrated that the wear of Filtek Ultimate is almost twice lower in comparison to wear of Filtek Z250 composite. It has been concluded that the use of filler nanoparticles significantly increased wear resistance of the material. Additionally, lack of correlation between material microhardness and wear resistance has been demonstrated.

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Mechanical Characteristics and Wear Resistance of the Cladding Layers Obtained by Melting of Cored Wires with Simultaneous Vibration of Substrate

. Character. 86, pp. 127 – 138, 2013 . [4] Wanga S., Li, H., Chenb, X., Chia, J., Li, M., Cha, L., Xua, H. “Improving microstructure and wear resistance of plasma clad Fe-based alloy coating by a mechanical vibration technique during cladding”, Mater. Sci. Eng. A 528, pp. 397 – 401, 2010 . [5] Pul’ka, Ch. V., Shablyy, O. N., Senchyshyn, V. S., Sharik, M. V., Hordan, H. N. “Influence of vibrations of a workpiece in the course of fusion on a structure and properties of the metal”, Avtomat. Svarka 705, pp. 27 – 29, 2012 . [6] Voitovych, A. A., Pokhmurs

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Wear Resistance of the Cermet Cutting Tools After Aluminum (Al+) and Nitrogen (N+) Ion Implantation

Abstract

In the paper, the issue of the cermet cutting tools wear resistance was addressed. The tool inserts made out of cermet composites were exposed to the ion implantation with ions of nitrogen N+ and with combination of nitrogen N+ and aluminum Al+ ions. In order to assess the impact of the ion implantation, the samples of stainless steel EZ6NCT25 were turned with the standard cutting tools and with the inserts after ion implantation. The results in general confirmed better wear resistance of the ion implanted inserts. In particular, they performed 20-40% smaller friction. After some time, when the destruction of the implanted surface layer took place, the friction coefficient rose up to the value typical for non-implanted inserts. For the implanted inserts, the wear index VB appeared to be lower, and even visual assessment revealed distinguishably smaller wear than in case of tools without ion implantation.

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ASSESSMENT TRIBOLOGICAL PROPERTIES OF COATINGS APPLIED BY HVOF TECHNOLOGY

sprayed coatings, Surface and Coatings Technology, Vol. 202, 4399-4405. 7. Lee C.W., Han J.H., Yoon J., Shin M.C., Kwun S.I. (2010), A study on powder mixing for high fracture toughness and wear resistance of WC-Co-Cr coatings sprayed by HVOF, Surface and Coatings Technology, Vol. 204, 2223-2229. 8. Lee C.W., Han J.H., Yoon J., Shin M.C., Kwun S.I. (2010), A study on powder mixing for high fracture toughness and wear resistance of WC-Co-Cr coatings sprayed by HVOF, Surface and Coatings Technology, Vol. 204, 2223-2229. 9

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Laser alloying of bearing steel with boron and self-lubricating addition

References [1] Podgornik B., Vižintin J., Borovšak U., Megušar F., Tribological properties of DLC coatings in helium, Tribol. Lett. 47(2) (2012) 223-230. [2] Gunes I., Cicek A., Aslantas K., Effect of Deep Cryogenic Treatment on Wear Resistance of AISI 52100 Bearing Steel, Trans. Indian Inst. Met. 67(6) (2014) 909-917. [3] Podgornik B., Borovsak U, Megusar F., Kosir K., Performance of low-friction coatings in helium environments, Surface & Coatings Technology 206 (2012) 4651-4658. [4] Nilsson M

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Laser borided composite layer produced on austenitic 316L steel

References [1] Glaeser W.A., Materials for Tribology, Tribology Series, 20,Elsevier, 1992. [2] Skołek-Stefaniszyn E., Kaminski J., Sobczak J., Wierzchoń T., Modifying the properties of AISI 316L steel by glow discharge assisted low-temperature nitriding and oxynitriding, Vacuum 85 (2010) 164-169. [3] Skołek-Stefaniszyn E., Burdynska S., Mroz W., Wierzchoń T., Structure and wear resistance of the composite layers produced by glow discharge nitriding and PLD method on AISI 316L austenitic stainless steel, Vacuum

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Research on the Properties of Co-Tic and Ni-Tic Hip-Sintered Alloys

, 37(7), 973–986 (in Russian). 14. Dmytrieva H.P., Cherepova T.S., Dukhota O.I., Nychyporenko V.I. (2017), Investigation of properties of sintered alloys based on ZhS32-VI with titanium carbide, Powder Metallurgy , 11/12, 68–75 (in Ukrainian). 15. Dukhota O.I., Tisov O.V. (2010), The study on wear resistance of heat resistant composite alloys in conditions of high temperature fret-ting-wear, Problems of friction and wear , 53, 195–200 (in Ukrainian). 16. Dukhota O.I., Tisov O.V., Cherepova T.S., Dmytrieva H.P., Kharchenko V.V. (2017

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Tribological Properties of PVD Ti/C-N Nanocoatnigs

Abstract

The present paper discusses and analyses tribological properties of various coatings that increase surface wear resistance. Four Ti/C-N nanocoatings with different coating deposition settings are analysed. Tribological and metrological tests on the samples are performed: 2D and 3D parameters of the surface roughness are measured with modern profilometer, and friction coefficient is measured with CSM Instruments equipment. Roughness parameters Ra, Sa, Sz, Str, Sds, Vmp, Vmc and friction coefficient at 6N load are determined during the experiment. The examined samples have many pores, which is the main reason for relatively large values of roughness parameter. A slight wear is identified in all four samples as well; its friction coefficient values range from 0,.21 to 0.29. Wear rate values are not calculated for the investigated coatings, as no expressed tribotracks are detected on the coating surface.

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Selected Properties Of Thermally Sprayed Oxide Ceramic Coatings

Abstract

The article presents the results of the study on exploitation properties of flame sprayed ceramic coatings produced by oxide ceramic material in the form of powder on the aluminum oxide Al2O3 matrix with 3% titanium oxide TiO2 addition and also on the zirconium oxide (ZrO2) matrix with 30% calcium oxide (CaO) on the substrate of unalloyed structural steel of S235JR grade. As a primer powder, metallic powder on the base of Ni-Al-Mo has been applied. Plates with dimensions of 5×200×300 mm and also front surfaces of ∅40×50 mm cylinders have been flame sprayed. Spraying of primer coating has been done using RotoTec 80 torch and external specific coating has been done with CastoDyn DS 8000 torch. Investigations of coating properties are based on metallography tests, phase composition research, measurement of microhardness, coating adhesion to the ground research (acc. to EN 582:1996 standard), abrasive wear resistance (acc. to ASTM G65 standard) and erosion wear resistance (acc. to ASTM G76-95 standard) and thermal stroke study. Performed tests have shown that the flame spraying with 97%Al2O3 powder containing 3% TiO2 and also by the powder based on zirconium oxide (ZrO2) containing 30% calcium oxide (CaO) performed in a wide range of technological parameters allow to obtain high quality ceramic coatings with thickness up to ca. 500 μm on a steel substrate. The primer coating sprayed with the Ni-Al-Mo powder to the steel substrate and external coatings sprayed has the of mechanical bonding character. The coatings are characterized by high adhesion to the substrate and also high erosion and abrasive wear resistance and the resistance for cyclic thermal stroke.

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Selection of Materials and Technology for Forming the Layers Resistant to Abrasive Wear

Selection of Materials and Technology for Forming the Layers Resistant to Abrasive Wear

This article deals with the selection of materials for forming wear resistant layers within agricultural machine parts wear. We can achieve required hardness, wear resistance and life extension of agricultural machine parts and tools by the selection of a suitable material and surfacing technology.

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