Microstructure and properties of laser clad Zr-based alloy coatings on Ti substrates

摘要

A Zr-based composite coating was produced by laser-clad of metal powders on a Ti substrate. The microstructure and phases formed in the coatings were studied. The coating consists of a mixture of intermetallic compounds, including a nanocrystalline phase and an amorphous phase. The bonding zone between the substrate and the coating is composed of columnar alpha-Ti(Zr) solid solution. The coating reveals higher microhardness and lower friction coefficient than the amorphous alloy prepared by suction casting. The predominant wear mechanism is abrasion and peeling. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 10]