The manufacturing technology of turbine blade

which is the first key component of aero-engine

has become an important indicator of a country’s manufacturing level. Ceramic mold preparation is a key step of blade manufacturing because the mold materials and preparation processes have a direct effect on the quality of blade manufacturing. The fabrication technology of core/shell integral ceramic mold based on stereolithography provides a new process for rapid fabrication of complex hollow turbine blades. Calcium oxide (CaO) is an ideal casting mold material with the advantages of high service temperature

good chemical stability at high temperature

similar thermal expansion coefficient to superalloy

easy removal

low price

etc. The advantages and problems of CaO-based ceramic mold in turbine blade investment casting are investigated in this paper

the research progress of the preparation of integral CaO-based ceramic casting is introduced

and the application prospect of integral CaO-based ceramic casting in turbine blade investment casting is discussed.