![]() Powder microstructures were then refined, which induced thinner coating morphologies and reduced porosity rate. When mechanical alloying process is employed to synthesize composite powders strengthened by particle dispersion, the powders tend to fracture into small segments, especially when high content of hard particles is added. ![]() Different characteristics were then observed. SEM observations, hardness measurements, and XRD analyses were the first technologies implemented to characterize the metal matrix composite coatings. After optimizing the process parameters on powder grain size, the composite coatings were compared with standard coatings manufactured from mixed powders. Indeed, the mechanical alloying method (ball milling) was implemented to synthesize NiCr-Cr 3C 2 and NiCrBSi-WC composite powders by using cold spraying and high-velocity oxygen fuel process, respectively. To meet this objective, the chosen approach was to optimize the powder morphology by mechanical alloying. In order to improve coating’s mechanical properties, it is necessary to increase homogeneity. The purpose of this study is to manufacture metal matrix composite coatings by thermal spraying.
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