Microstructure and Tribological Performance of Thermally Sprayed Molybdenum Coating

Younes, Rassim; Bradai, Mohand Amokrane; Sadeddine, Abdelhamid; Mouadji, Youcef

doi:10.1007/s42250-021-00306-z

Cited by 5 publications

(1 citation statement)

References 23 publications

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“…The data cover a wide range of parameters, including mechanical and thermo-physical properties, and similar and dissimilar ceramics contacts. Younes et al [21][22] reported that the wear resistance of coatings generated by plasma deposition from the Al2O3-13% TiO2 powder (AT-13) was higher than that of coatings developed from powders of Al2O3-13% TiO2 (AT-13).On the other hand, Shtern et al concluded that thin-film contact systems for thermocouples operating in a wide range of temperatures are mainly under pressure [23]. In another study, Leszek Łatka found that the low wear resistance of coatings (AT-13) realized with conventional cavitations micrometric powders is due to the presence of brittle phases from titanium oxide produced between the splats of multilayers [24].Wang et al developed a numerical model for predicting the temperature rise during sliding contact between two rough surfaces.…”

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confidence: 99%

Modeling Temperature of Contact Generated in Coatings of Pure Alumina Ceramic onto Low Carbon Steel Type 1.0060 Obtained by the Thermal Spraying Process

Younes¹,

Mouadji

Touati³

et al. 2023

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In previous research problem statement occur in hardness to reach the thermal flux between surfaces during movement. The aim of the present investigation has been conducted to study the thermal behavior of ceramic Al2O3 (AL-99) coated on a low carbon steel type 1.0060 by using a thermal flame spray technique. The key methods used is microstructural characterization and comparing between experimental data record and numerical program.SEM showed that the Al2O3 coatings have a dense microstructure, lamellar morphology and complex of several phases. The XRD analysis of the coating after the spray showed a majority phase of α -Al2O3 rhombohedral structure and secondary phase of γ-Al2O3 orthorhombic structure. The experimental data recorded From wear indicate two step, first one corresponds to the phase of accommodation between surfaces (samples/ disc), the contact temperature gradually increases to a value Of 75 °C for both pairs, the second step , we could remark from experimental and numerical simulation, it reach 95°C for experimental test and 85 for numerical model.The important findings in tribological results showed that the temperature at the contact is related to the shear stress that will result from the increase of the heat flux. From these results it can be said that the measured temperature increases with the increase of the charge and converges with the contact time. The gap of temperature between experimental and numerical results is probably due to the parameter of microstructure, where in experimental porosities improve convection in the area, in contrast the numerical materials don't add this phenomena.

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