熔融石英级配对光固化制备陶瓷型芯性能的影响OA

As an important part of the hollow turbine blades of aero-engines,ceramic cores have become one of the core elements of modern industrial manufacturing technology.Compared with the hot-injection molding method,the silica-based ceramic cores fabricated via the stereolithography technology still have problems such as insufficient flexural strength and excessive sintering shrinkage.In this project,an in-depth study was carried out on the formulation of the ceramic slurry,investigating the influence rules of the gradation of fused quartz powder on the fluidity and curing characteristics of the slurry.The graded slurries were printed and subsequently subjected to high-temperature sintering,and the microstructure,element distribution and phase composition of the sintered cores were analyzed,and a gradation strategy of fused quartz powder suitable for the stereolithography process was obtained.When the fused quartz powder Si-A(particle size of 5.8 μm)and Si-B(particle size of 21 μm)are compounded in a ratio of 7∶3,the shrinkage rate and mechanical properties of the sintered ceramic core can meet the actual use requirements.This study provides a significant reference for the performance optimization of stereolithography-fabricated ceramic cores.