Directional Solidification, Structure, and Mechanical Properties of a Eutectic Nb–Si Alloy with a Natural Composite Structure for GTE Blades

Resumo

Directional solidification in a liquid-metal coolant and the formation of a natural composite structure in a eutectic niobium–silicon alloy are studied to produce GTE blades in ceramic molds. The microstructure and the phase composition of the alloy are analyzed in parts of variable sections. The shortand long-term strengths of the niobium–silicon composite material are measured at a temperature of 1200°C.