Effects of phosphorus and carbon content on the surface tension of FeSiBPC glass-forming alloy melts

Abstract Phosphorus and carbon content and temperature dependence of surface tension for FeSiBPC alloy melts were investigated by sessile drop method. The surface tension of investigated alloy melts decreased firstly approaching the minimum near 1325 °C, and subsequently increased with raising temperature. The contact angle monotonously decreased with increasing temperature. The surface tension was weakened by the addition of phosphorus and carbon elements in FeSiB-based alloy. The wettability of the melt on the ceramic substrate was improved by the increase of carbon amount. These phenomena above were further analysed and discussed in relation to the cluster interaction, and chemical interaction between the melt and the ceramic substrate. It provides theoretical reference for the metallurgical preparation of Fe-based amorphous alloys.