Investigation and characterization of electrospark deposited chromium carbide-based coating on the steel

Korkmaz, Kemal

doi:10.1016/j.surfcoat.2015.04.033

Cited by 41 publications

(15 citation statements)

References 19 publications

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“…Its power consumption was 1.25 kW, and the output of stabilized voltage was constant at 45 V. It has the capability to generate pulses with a given energy and shape form. The installation is run with a special computer program [20]. The MAO process equipment consisted of bipolar pulsed AC power (100 kW) source, a stainless steel container as the elec-trolyte cell, and a stirring and cooling system [25].…”

Section: Esd and Mao Process Devicesmentioning

confidence: 99%

“…However, in most of these methods, it has not been easy to develop a coating, and they have been highcost coating processes. On the other hand, the electrospark deposition (ESD) technique offers some unique advantages relative to these methods [17][18][19][20]. In a previous study [21] FeAl coating which was coated on 316L stainless steel surface had a higher hardness and corrosion resistance than the substrate.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Al2O3/Fe-Al intermetallic duplex coating prepared with a combined technique of electro-spark deposition and micro-arc oxidation on steel

Çakır¹,

Korkmaz²,

Kayalı³

2017

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In the present study, an electro-spark deposition method was applied to obtain a corrosion resistant FeAl-based layer onto the steel surface. In this context, firstly the pulse parameters of deposition process were optimized and among all the parameters, 200 A and 50 µs were determined as the best ones. Then, micro-arc oxidation technique was performed to enhance tribological properties of the FeAl-coated steel samples in the electrolyte solution which consisted of Na3PO4 and NaAlO2. The coated samples were characterized by SEM/EDX and XRD examinations. The results showed that the duplex coating was composed of Al2O3 and FeAl2 phases while FeAl, Fe2Al5, and Fe3Al phases were present in the ESD coating. Mechanical properties of duplex coatings on the steel substrate were significantly improved, and so the microhardness of micro-arc oxidation and electro-spark deposition coatings was about 4 and 5 times of the steel substrate microhardness, respectively. Moreover, the corrosion resistance of the coatings was determined as well. Its value for the micro-arc oxidation and electro-spark deposition coating was about 40 and 20 % better than that for the substrate steel, respectively.

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Section: Esd and Mao Process Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Al2O3/Fe-Al intermetallic duplex coating prepared with a combined technique of electro-spark deposition and micro-arc oxidation on steel

Çakır¹,

Korkmaz²,

Kayalı³

2017

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“…Therefore, the cooling rate in the ESD process may reach in the range of 10 5 -10 6°C /s, and such rapid solidification can be utilized to produce coatings containing nano-sized grains or even an amorphous structure. In recent years, using the ESD technique to deposit highperformance coating seems quite promising, such as chromium carbide-based coatings, 7 Cu/Cu-MoS 2 selflubricating coatings, 8 WC-Co coatings, 9 in-situ TiN coatings, 10 Zr-based amorphous-nanocrystalline coatings, 11 CuNiSiTiZr high-entropy alloy coatings 12 and W-Ni-Fe-Co coatings. 13 However, most research about ESD coatings focused on the mechanical properties, so the oxidation resistance of ESD coatings still needs further investigations.…”

Section: Introductionmentioning

confidence: 99%

Isothermal oxidation behavior of electrospark deposited NiCrAlY coatings on a Ni-based single-crystal superalloy

Guo¹,

Liang²,

Lü³

et al. 2019

Mater. Tehnol.

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The isothermal oxidation behavior of a NiCrAlY coating prepared by means of electrospark deposition (ESD) technology on second-generation Ni-based single-crystal DD6 was investigated at 1100°C for 100 h. Surface morphologies, chemical composition, and the phase constitution of the coating were analyzed by scanning electron microscopy (SEM), energy-dispersive spectrometer (EDS) and X-ray diffraction (XRD). The results showed that the as-deposited NiCrAlY coating, with uniform superfine columnar crystals and nanocrystallines, consists of b-NiAl and g-Ni double phases; the oxidation resistance of the DD6 alloy was greatly improved by depositing the NiCrAlY coating, which was covered by two layers of oxides, q-Al2O3 and a-Al2O3, while three layers of oxides, including Ni(Co)O, NiCr2O4, CrTaO4, CoTa2O6 and a-Al2O3, formed on the DD6 superalloy; the interdiffusion zone (IDZ) and secondary reaction zone (SRZ) formed between the NiCrAlY coating and the DD6 superalloy substrate for the interdiffusion; however, no deleterious Kirkendall voids appeared, which may be mainly due to the gradient transition of the elements between the coating and the substrate.

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“…Nowadays, MEW and its branches are used in the automotive industry to form coatings on the valves in combustion engines, in aerospace to increase the fatigue life and also in nuclear energy applications to prevent wear and resist against damaging [16,[21][22][23][24][25][26][27]. Some examples are Mo 2 FeB 2 -based cermet coating on high speed steel substrate and Chromium carbide-based coating on the microalloy steel using ESD [28,29]. The WC-Co-Al 2 O 3 coating (60-70 µm) produced by ESD increased the hardness, wear resistance and corrosion resistance of the C45 steel.…”

Section: Introductionmentioning

confidence: 99%

Surface Characterization and Corrosion Resistance of 36Cr-Ni-Mo4 Steel Coated by WC-Co Cermet Electrode Using Micro-Electro Welding

Azhideh

Aghajani

Pourbagheri

2017

Metals

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Abstract:In this paper the influence of spark energy on corrosion resistance, hardness, surface roughness and morphology of WC-Co coated 36Cr-Ni-Mo4 steel by Micro-Electro Welding (MEW) was investigated. Frequencies of 5, 8 and 11 kHz, currents of 15, 25 and 35 A and duty cycles of 10, 30 and 50 % were applied for coating of the samples using a WC-Co cermet electrode. The results indicate that increasing the current, Duty cycle and frequency of the process increases spark energy. As spark energy increases, efficiency of coating increases to 80% and then decreases. X-ray diffraction (XRD) analysis was used to identify the phases. The results indicated that other than the peaks obtained for the metallic Iron with BCC (Body Centered Cubic) structure, Tungsten Carbide, Cr 7 C 3 and Titanium Carbide phases were also seen on the surface. Vickers micro hardness method was used for hardness measurement of the samples. Surface hardness increases to 817.33 HV0.05 with spark energy increasing up to 1.03 mJ, and then reducing. Optical Microscopy (OM) and scanning electron microscopy (SEM) to study Microstructural and atomic force microscopy (AFM) to study the topography, morphology and roughness were used. Polarization technique in 3.5 wt % NaCl solution was used to evaluate the corrosion properties. The results of the energy dispersive X-ray spectroscopy (EDS) analysis indicate that with increasing spark energy, the amount of Tungsten in surface increases to 41.95 wt % and then decreases. As spark energy increases up to 2.17 mJ, thickness of coating increases to 8.31 µm and then decreases. As spark energy increases, surface roughness is also increased. Corrosion test results indicated that the lowest corrosion rate (2.6 × 10 −8 mpy) is related to the sample with the highest level of efficiency.

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Investigation and characterization of electrospark deposited chromium carbide-based coating on the steel

Cited by 41 publications

References 19 publications

Study on the Al2O3/Fe-Al intermetallic duplex coating prepared with a combined technique of electro-spark deposition and micro-arc oxidation on steel

Study on the Al2O3/Fe-Al intermetallic duplex coating prepared with a combined technique of electro-spark deposition and micro-arc oxidation on steel

Isothermal oxidation behavior of electrospark deposited NiCrAlY coatings on a Ni-based single-crystal superalloy

Surface Characterization and Corrosion Resistance of 36Cr-Ni-Mo4 Steel Coated by WC-Co Cermet Electrode Using Micro-Electro Welding

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