Abstract

The solidification behavior of arc-melted alloys in the V-rich portion of the ternary V-Si-B alloy system has been experimentally investigated. A detailed microstructure analysis of several as-cast alloys based on SEM observations, EDS/WDS and EBSD measurements was carried out. As a result, different primary solidification reactions in the V-rich V-Si-B system were identified. On the two binary boundary systems V-Si and V-B those reactions were attributed to VSS, V3Si, V5Si3, V3B2 and VB. Furthermore, a primary solidification reaction within the ternary system was attributed to V5SiB2. As a result, the new data allows a reconstruction of the liquidus surface of the V-Si-B phase diagram.

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