Laminar Fe-based amorphous composite coatings with enhanced bonding strength and impact resistance

摘要: Abstract Laminar coatings comprising a multi-amorphous Fe 48 Mo 14 C 15 Y 2 B 6 layer and crystalline NiCrAl were prepared by the high-velocity oxygen fuel technique. The structures of studied with X-ray diffraction, scanning electron microscopy cross-sectional transmission microscopy, while various mechanical properties, such as hardness, strength, interfacial toughness, bonding strength impact resistance, investigated micro/nanoindentation, three-point bending adhesion testing well tup-drop impacting coupled finite element method simulations. results show that composite exhibit an almost fully compact structure at interfaces between amorphous attractive combination high hardness good toughness resistance respect to monolithic coating. maximum obtained in laminar reached 40 MPa 21.2 J, respectively, which are respectively ∼54% 10-fold increase over enhancement from formation localized metallurgical complete wettability layer, is observed high-temperature contact angle tests. improvement hindering crack propagation mitigation stress concentration due addition soft multilayers. present work may pave way development durable, tough highly resistant amorphous–matrix for applications severe loading conditions.