SPECIAL ASPECTS OF DIFFUSIONAL TRANSFER OF THE ALLOYING ADMIXTURE DURING ION NITRIDING OF THE THERMAL-SPRAYED COATINGS

GRIGORCHIK Aleksandr N., Post-Graduate Student, Junior Researcher of the Center of Structural Research and Tribo-Mechanical Test of Materials and Machine-Building Output

KUKAREKO Vladimir A., Dr. Phys.-Math. Sc., Associate Professor, Head of the Center of Structural Research and Tribo-Mechanical Test of Materials and Machine-Building Output, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BYELI Aleksey V., Dr. Techn. Sc., Professor, Associate Director, Physicotechnical Institute of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus

BELOTSERKOVSKIY Marat A., Dr. Techn. Sc., Associate Professor, Head of the Laboratory of Thermal Spray Methods of Machines units Managment, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus

The effect of ion-beam nitriding of 09X19H9T austenitic high velocity oxygen fuel coating on phase composition and structure of nitrided layer has been investigated. The distribution of nitrogen atoms in near-surface layer has been studied. It is established that deposited particles with relatively low depth of oxide streaks have higher concentration of alloying element and microhardness. The model connecting inhomogeneous distribution of alloying element in deposited particles with diffusion impermeability of oxide streaks located on the boundaries of the deposited particles has been suggested.

thermal coating, ion-beam nitriding, oxide streaks, concentration discontinuity

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