单晶高温合金熔模铸造陶瓷型壳研究进展OA

As a key auxiliary material in investment casting,the ceramic shell molds are widely used in the manufacturing of hot-section components such as turbine blades for aircraft engines and gas turbines,and particularly critical in supporting the engineering-scale production of single-crystal superalloy blades.This paper systematically reviews the recent research progress on the high temperature properties of the ceramic shell molds in terms of the component selection and optimization of refractory materials,binders,and mineralizers,as well as the microstructure regulation strategies of shell molds based on pore-forming agents.The results show that the refractory materials with high melting point,organic binders,and fibrous pore-forming agents have good application prospects in improving the high-temperature performance of ceramic shell molds.Research on the underlying mechanisms of slurry stability,phase composition of the shell mold and pore structure distribution on the service performance remain to be fully elucidated.Future research should continue to promote the development and application of ceramic shell molds with higher-temperature load-bearing capacity.