Wear resistance of Fe 66 Cr 10 Nb 5 B 19 detonation coatings under dry linearly reciprocating conditions and nanoscratch test

Abstract

Abstract The Fe66Cr10Nb5B19 alloy coatings with high hardness (~ 850 HV300), low porosity (less 3%), low content of crystalline phase (less 2.5 wt.%), elevated nanohardness (average value 13.7 GPa), and high wear resistance were obtained in a wide range of detonation spraying modes. The results under dry linearly reciprocating sliding wear tests of coatings and stainless steel carried out according to ASTM G 133-05 are presented. The volume loss of detonation coatings obtained at an explosive charge of 50–70%, measured on an optical profilometer, is significantly lower than that of stainless steel. The similar values of volume scratches of Fe66Cr10Nb5B19 coatings obtained at an explosive charge of 40–70% can be attributed to similar values of porosity and content of crystalline phase. The scratch and spalling mechanisms are the main mechanisms of material removal from the coatings.