Microstructural and Mechanical Properties of Ni-Base Thermal Spray Coatings Deposited by Flame Spraying |
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| Authors: | Bradai Mohand Amokrane Sadeddine Abdelhamid Mouadji Youcef Benabbas Abderrahim Bounar Nedjemeddine Mammeri Ahmed |
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| Affiliation: | (1) Laboratory of Technology of Materials and Engineering of the Processes, Faculty of Technology, University of Bejaia, 06000 Bejaia, Algeria;(2) Laboratory of Mechanic, Faculty of Science Engineering, University of Constantine, 25000 Constantine, Algeria;(3) Laboratory of Interaction Materials and Environment, University of Jijel, 18000 Jijel, Algeria;(4) E.T.S. Industrial Engineering, University of Oviedo, Campus, 33203 Gijon, Spain |
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| Abstract: | In this work, two different Ni-base powders, namely, ProXon 21021 (P21) and ProXon 21031 (P31), were sprayed onto a steel
substrate 35CrMo4 using a thermal flame spray technique. The morphology and chemical composition of the phases that are present
in the powders and coatings were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy
dispersive spectroscopy (EDS). The hardness and wear resistance of the coatings were investigated. The XRD analysis revealed
that the phases present in the coatings are different from the initial powders. In addition, some inhomogeneities such as
oxides, porosity, and unmelted particles were observed by SEM. It was found that the P31 spray-coated exhibited higher microhardness,
higher wear resistance, and significantly lower friction coefficient in comparison with those of P21 coatings. |
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