Abstract: This paper presents development of thermal spray tequniques and shows state of art applications. Results of an investigation into the structure of plasma sprayed NiCrBSi coating is discussed. The powder granulometry and the microstructure of the plasma sprayed deposits were studied using an SEM/EDS analyzer. Phase composition was examined using the Bruker D-8 Advance diffractometer. The tests show that the coatings consist of an NiCrBSi deformed grains of powder and thin strips of oxides with low porosity and different phase composition than sprayed powder.
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