Phase dependence of Fe-based bulk metallic glasses on properties of thermal spray coatings

Thermal spray coatings of two different Fe-based bulk metallic glasses (BMGs) were prepared using atmospheric plasma spray (APS) technique. Effects of crystallinity and chemical phase composition of the initial feedstock materials and the impact of plasma jet on the properties of the Fe-based metallic glass powders were discussed by characterizing the coating properties. Also, partial and complete melting of powders in plasma and the effects on oxidation and crystallization are discussed. Powder which contains elements such as Al and Si, showed better wear property because of oxidation effect and any deviation from the optimum quantity of elements would affect coating properties. (C) 2008 Elsevier B.V. All rights reserved.