ALUMINA CORE FOR FORMING COOLING PASSAGEWAY OF GAS TURBINE BLADE

摘要

PROBLEM TO BE SOLVED: To provide an alumina core capable of being manufactured by low-temperature sintering (1,500°C or lower).SOLUTION: An alumina core used to form a cooling passageway of a gas turbine blade made by precision casting has an alumina particle as a principal ingredient, and contains a silica-alumina complex oxide (aluminosilicate) or a silica. The silica-alumina complex oxide or silica is disposed in at least a part of gaps between the alumina particles.