Microstructure and Selected Properties of Cr3C2-NiCr Coatings Obtained by HVOF on Magnesium Alloy Substrates

Ewa Jonda; Leszek Łatka; Wojciech Pakieła

doi:10.3390/ma13122775

Microstructure and Selected Properties of Cr₃C₂-NiCr Coatings Obtained by HVOF on Magnesium Alloy Substrates

Materials (Basel). 2020 Jun 18;13(12):2775. doi: 10.3390/ma13122775.

Authors

Ewa Jonda¹, Leszek Łatka², Wojciech Pakieła¹

Affiliations

¹ Department of Engineering Materials and Biomaterials, Silesian University of Technology, Konarskiego St. 18a, 44-100 Gliwice, Poland.
² Department of Metal Forming, Welding and Metrology, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Łukasiewicza St. 5, 50-371 Wroclaw, Poland.

Abstract

In present work the Cr₃C₂-NiCr coating was deposited on magnesium alloy substrate with high velocity oxygen fuel (HVOF) spraying. The microstructure of the samples has been characterized by means of electron microscopy, SEM and phase composition analysis carried out. The porosity of coatings has been also estimated. Finally, tests of selected mechanical properties, such as instrumented indentation, abrasive erosion have been performed. The results of the investigations confirmed that dense, homogeneous and well-adhered Cr₃C₂-NiCr cermet coating is possible to obtain onto the magnesium AZ31 alloy substrate. Moreover, the coatings exhibit high resistance to erosion.

Keywords: Cr3C2–NiCr cermet powder; HVOF spraying; erosion resistance; instrumented indentation; magnesium AZ31 alloy; microstructure.