Mechanical Behavior of the Amorphous/Nanocrystal Ni-Mo_23.56 Alloy Coatings by Electrodeposition

Abstract

The amorphous alloy application is limited because of its brittleness property. Based on the grain structural characteristics of nanocrystal alloys, the mechanical behavior of the amorphous/nanocrystal Ni-Mo23.56alloy is investigated in this text. The microstructure of the deposit and the crack propagation were discussed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The experimental results show that amorphous/nanocrystal Ni-Mo23.56alloy has a higher microhardness, a strong binding force between a certain thickness coating with the substrate. The tensile stress-strain pattern shows a certain degree of plastic deformation behavior in the coating and tensile fracture surface of radial vein structure, in line with the free volume fracture model.

Wear properties of Ni–Mo coatings produced by pulse electroforming

“…The Ni-13Mo coating is a potential substitute for chromium coatings in industrial applications when operating at temperatures higher than 100°C and when good microhardness properties are required. Because the electrodeposition of Ni-Mo alloy yields better mechanical, anticorrosive and thermal stability characteristics, coupled with its nanocrystalline/amorphous microstructure to further enhance the mechanical properties (such as the tensile strength and degree of hardness) [3,[6][7][8], this alloy has the opportunity to replace hexavalent chromium plating.…”