Facile preparation of nanocrystalline Fe2B coating by direct electro-spark deposition of coarse-grained Fe2B electrode material

Wei, Xiang; Chen, Zhiguo; Zhong, Jue; Wang, Li; Hou, Zhiwei; Zhang, Yi; Tan, Fengliang

doi:10.1016/j.jallcom.2017.05.081

Cited by 22 publications

(13 citation statements)

References 35 publications

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“…can also improve the surface performance. For instance, some ESD coatings can prolong the service life of different components by using high-temperature oxidation-resistant material, hardening material, corrosion-resistant material or wear-resistant material [12][13][14][15]. Over the last few decades, many excellent research results have been reported on component repair by electro-spark deposition.…”

Section: Methodsmentioning

confidence: 99%

Microstructure and Wear Resistance of Ti6Al4V Coating Fabricated by Electro-Spark Deposition

Wang

Han

2018

Metals

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In this study, a Ti6Al4V coating with a large thickness of more than 550 µm was successfully deposited onto the surface of Ti6Al4V substrate by electro-spark deposition. The microstructure, phase composition, microhardness and wear resistance of the deposited coating were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), Vickers hardness and wear tester, respectively. The results show that the deposited coating is mainly composed of α’ martensite. The interface between the deposited coating and the underlying substrate is even and consecutive, which implies that a good metallurgical bond was obtained. The average hardness of the deposited coating is ~540 HV, which is about 1.6 times that of the substrate. The wear resistance of deposited coatings is obviously superior to the substrate. Under same conditions, the friction coefficient of the deposited coating decreases by about 0.19. The cumulative mass loss of the coating specimens is only about 1.58 mg in 20 min tests, while the mass loss of the substrate is ~3.6 mg. The analysis indicates that the improvement on wear resistance can be mainly attributed to the high hardness of the deposited coating, i.e., the hardened coating relieves the micro-cutting and adhesive wear in wear processes.

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Section: Methodsmentioning

confidence: 99%

Microstructure and Wear Resistance of Ti6Al4V Coating Fabricated by Electro-Spark Deposition

Wang

Han

2018

Metals

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“…The production of ESD protective coatings has also found wide application in the automotive industry [ 24 ]. Many works have been devoted to assess the effect of electro-spark deposition parameters on the properties of coatings [ 25 , 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Laser Beam Processing on the Properties of WC-Co Coatings Deposited on Steel

et al. 2021

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The main objective of the present work is to determine the effects of laser processing on properties of WC-Co electro-spark deposited (ESD) coatings on steel substrates. Tungsten carbide coatings have been applied to steel substrates using a manual electrode feeder, model EIL-8A. The laser beam processing (LBP) of electro-spark coatings was performed using an Nd:YAG fiber laser. The microstructure and properties of laser treated/melted coatings were evaluated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), surface geometric structure (SGS) and roughness measurements and adhesion, microhardness, residual stresses, corrosion resistance and application tests. The obtained experimental data were subjected to statistical analysis and multidimensional numerical and visual exploratory techniques. It has been shown conclusively that the laser-treated ESD WC-Co coatings are characterized by lower microhardness, higher resistance to corrosion, increased roughness and better adhesion to the substrate. LBP homogenizes the chemical composition, refines the microstructure and heals microcracks and pores of ESD coatings. The laser treated ESD WC-Co coatings can be used in frictional sliding nodes (e.g., on the front seal rings used in pumps) and as protective layers.

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“…The impact of the parameters of electro-spark deposition on the coating properties is still the subject of research on the following: influence of a carbon content on coating properties [12], formation of ESD spot [13], ESD alloying [14,15], coating of biomedical implants [16], mass transfer modeling in ESD [17], titanium-based ESD [18,19], and analysis of the structure of electro-spark deposited coatings [20,21]. Rukanskis [22] has shown the advantages of the economical use of ESD coatings on metal surfaces.…”

Section: Introductionmentioning

confidence: 99%

The Morphology and Mechanical Properties of ESD Coatings before and after Laser Beam Machining

et al. 2020

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Electro-spark deposition (ESD) and laser beam machining (LBM) are the technologies using the concentrated energy flux. This paper deals with the issue of the impact of laser modification on the morphology and mechanical properties of carbide/copper coatings produced by electro-spark treatment. The coatings were applied to C45 carbon steel samples using the EIL-8A device. The following three types of electrodes made using the powder metallurgy (PM) hot pressing technique, from copper and tungsten carbide powders of different percentage compositions, were used for the coatings: 25% WC and 75% Cu; 50% WC and 50% Cu; and 75% WC and 25% Cu. Laser modification of the surface layers was performed with an Nd:YAG laser. The research focused on the analysis of the morphology of coatings applied by electro-spark technology before and after laser processing. The analysis of the morphology of electro-spark coatings revealed that the coatings had microcracks and pores. The laser beam machining of ESD coatings led to the homogenization of chemical composition, fragmentation of the structure, and elimination of microcracks. In addition, measurements of porosity, microhardness, adhesion, and analysis of XRD phase composition of the electro-spark coatings were performed. Laser processing proved to have a positive effect on improving the adhesion of coatings and reducing their porosity. This paper also presents a simulation model of heat transfer processes for the case of laser radiation impact on a WC-Cu coating. The developed numerical model, describing the influence of laser treatment on the distribution of temperature fields in the heated material (at a given depth) is of significant importance in the development of treatment technologies. Laser-modified ESD coatings perform anti-wear and protective functions, which enable their potential application in means of transport such as rolling stock.

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Facile preparation of nanocrystalline Fe2B coating by direct electro-spark deposition of coarse-grained Fe2B electrode material

Cited by 22 publications

References 35 publications

Microstructure and Wear Resistance of Ti6Al4V Coating Fabricated by Electro-Spark Deposition

Microstructure and Wear Resistance of Ti6Al4V Coating Fabricated by Electro-Spark Deposition

The Effect of Laser Beam Processing on the Properties of WC-Co Coatings Deposited on Steel

The Morphology and Mechanical Properties of ESD Coatings before and after Laser Beam Machining

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