Influence of Feedstock Materials and Spray Parameters on Thermal Conductivity of Wire-Arc-Sprayed Coatings

Yao, Haihua; Zhou, Zheng; Wang, G. H.; He, Dingyong; Bobzin, Kirsten; Zhao, Li‐Dong; Öte, Mehmet; Königstein, Tim

doi:10.1007/s11665-017-2567-0

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…This technology is based on arc melting of two cored wires, which are fed into the system. The Cr 13% Fe coatings produced by the TWAS technology are characterized by high heterogeneity, high amounts of porosity, oxide inclusions, and inter-splat boundaries [ 24 ]. The expected thermal conductivity of such coating is from 2 to 10 W·m −1 ·K −1 [ 24 ].…”

Section: Methodsmentioning

confidence: 99%

“…The Cr 13% Fe coatings produced by the TWAS technology are characterized by high heterogeneity, high amounts of porosity, oxide inclusions, and inter-splat boundaries [ 24 ]. The expected thermal conductivity of such coating is from 2 to 10 W·m −1 ·K −1 [ 24 ]. The substrate was made from a S235 construction steel, of which thermal conductivity was assumed to be in the range from 40 to 50 W·m −1 ·K −1 .…”

Section: Methodsmentioning

confidence: 99%

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Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity

et al. 2020

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Pulsed thermography is a common technique for nondestructive testing (NDT) of materials. This study presents the apparent effusivity method for the quantitative evaluation of coating thickness in a one-sided thermal NDT procedure. The proposed algorithm is based on determining a threshold value of apparent effusivity, which can be found for particular coating-on-substrate structures. It has been found that the square root of the time at which the apparent effusivity curve reaches this threshold is proportional to the coating thickness. The efficiency of the proposed approach is demonstrated by analytical modeling and experimentation performed on thermally-sprayed coatings.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity

et al. 2020

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“…It is here where the formation of oxides is estimated, especially Cr2O3, as analyzed with the XPS technique, and whose formation is given by the Cr coming from the 140MXC wire [46]. In this case, the mass loss is more influenced by the pressures, although the electrical parameters, especially the current, can be explained from the point of view of the thermal conductivity of the precursor coatings and have an inverse relationship with the increase in the oxide inclusions generated during the projection, so the minimum oxide contents cause the highest thermal conductivity in the coatings according to the research of [42]. From the point of view of the thermal conductivity of the coatings, the temperature tends to increase for large particles, i.e., greater than 200 microns.…”

Section: Potentiodynamic Polarization (Tafel) Testmentioning

confidence: 99%

Effect of the Surface Chemical Composition on the Corrosion Resistance in the Mixture of FeCrMoNbB (140MXC) and FeCMnSi (530AS) Coatings Produced with the Electric Wire Arc Spraying Technique: Part I

Rojas-Molano,

Olaya-Flórez,

Guzmán-Pardo

et al. 2023

Materials

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In this study, FeCrMoNbB (140MXC) and FeCMnSi (530AS) coatings were simultaneously projected on the substrate AISI-SAE 4340 using the electric wire arc spraying technique. The projection parameters, such as current (I), voltage (V), primary air pressure (1st), and secondary air pressure (2nd), were determined using the experimental model Taguchi L9 (34−2). Its main purpose is to produce dissimilar coatings and to evaluate the effect of the surface chemical composition on the corrosion resistance in the mixture of 140MXC-530AS as commercial coatings. Three phases were considered to obtain and characterize the coatings: Phase 1: Preparation of materials and projection equipment; Phase 2: Coatings production; and Phase 3: Coatings characterization. The characterization of the dissimilar coatings was carried out using the techniques of Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDX), Auger Electronic Spectroscopy (AES), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The results of this characterization corroborated the electrochemical behavior of the coatings. The presence of B was determined with the XPS characterization technique in the mixtures of the coatings in the form of Iron Boride. Moreover, the XRD technique showed Nb in the form of FeNb as a precursor compound for the 140MXC wire powder. The most relevant contributions are the pressures, provided that the quantity of oxides in the coatings decreases with respect to the reaction time between the molten particles and the atmosphere of the projection hood; moreover, for the corrosion potential, the operating voltage of the equipment does not exert any effect since these tend to remain constant.

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Optimizing Parameters of Arc-Sprayed Fe-Based Coatings Using the Response Surface Methodology

et al. 2023

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Influence of Feedstock Materials and Spray Parameters on Thermal Conductivity of Wire-Arc-Sprayed Coatings

Cited by 6 publications

References 19 publications

Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity

Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity

Effect of the Surface Chemical Composition on the Corrosion Resistance in the Mixture of FeCrMoNbB (140MXC) and FeCMnSi (530AS) Coatings Produced with the Electric Wire Arc Spraying Technique: Part I

Optimizing Parameters of Arc-Sprayed Fe-Based Coatings Using the Response Surface Methodology

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