Water-soluble salt-based ceramic cores can be recycled and have excellent high-temperature chemical stability.In this work,vat photopolymerization was successfully applied to water-soluble salt-based ceramic cores for...Water-soluble salt-based ceramic cores can be recycled and have excellent high-temperature chemical stability.In this work,vat photopolymerization was successfully applied to water-soluble salt-based ceramic cores for the first time.The powder raw materials of the printing suspension were sodium chloride and alumina.High-precision green bodies were manufactured by optimizing suspensions and parameters.In addition,the postprocessing method was optimized according to the microstructure and mechanical properties.The sintered part had a high bending strength and smooth surface.Finally,the dissolution rate and moisture resistance were compared under different dissolution and storage conditions.Compared to traditional manufacturing methods,vat photopolymerization enables the production of complex structures without molds and reduces production costs.This technology is suitable for the rapid iteration of complex structural parts and can be applied to precision parts in aerospace,military,and other technical fields with high cost-effectiveness and sustainability.展开更多
Hierarchical and porous complex metal structures have important prospects in biomedical medicine,aerospace,and other important industries.Current processing methods,including conventional and additive manufacturing,st...Hierarchical and porous complex metal structures have important prospects in biomedical medicine,aerospace,and other important industries.Current processing methods,including conventional and additive manufacturing,still face many challenges in fabricating 3D metal structures with complex internal structures,especially aluminum alloy ones.Metal molten infiltration on the basis of sacrificial salt templates provides a feasible solution for manufacturing complex internal structures of aluminum alloy,and the development of paste for direct ink writing is pivotal for the successful fabrication of salt templates.This study introduces a novel salt-based paste for printing sacrificial templates by direct ink writing.A print analysis model is formulated based on direct ink writing.Model and experimental results show a remarkable link between strut size and printing pressure and moving speed,but no such link exists between strut size and nozzle height.The paste can be printed into various complex structures by direct ink writing devices.Complex structures of aluminum alloys can be fabricated by metal infiltration and leaching of salt templates.This work provides a new reference technology for fabricating aluminum alloys with complex structures in the future.展开更多
基金the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2021160)the National Natural Science Foundation of China(No.51802319)the Technology and Engineering Center for Space(No.CSU-QZKT-2019-04).
文摘Water-soluble salt-based ceramic cores can be recycled and have excellent high-temperature chemical stability.In this work,vat photopolymerization was successfully applied to water-soluble salt-based ceramic cores for the first time.The powder raw materials of the printing suspension were sodium chloride and alumina.High-precision green bodies were manufactured by optimizing suspensions and parameters.In addition,the postprocessing method was optimized according to the microstructure and mechanical properties.The sintered part had a high bending strength and smooth surface.Finally,the dissolution rate and moisture resistance were compared under different dissolution and storage conditions.Compared to traditional manufacturing methods,vat photopolymerization enables the production of complex structures without molds and reduces production costs.This technology is suitable for the rapid iteration of complex structural parts and can be applied to precision parts in aerospace,military,and other technical fields with high cost-effectiveness and sustainability.
文摘Hierarchical and porous complex metal structures have important prospects in biomedical medicine,aerospace,and other important industries.Current processing methods,including conventional and additive manufacturing,still face many challenges in fabricating 3D metal structures with complex internal structures,especially aluminum alloy ones.Metal molten infiltration on the basis of sacrificial salt templates provides a feasible solution for manufacturing complex internal structures of aluminum alloy,and the development of paste for direct ink writing is pivotal for the successful fabrication of salt templates.This study introduces a novel salt-based paste for printing sacrificial templates by direct ink writing.A print analysis model is formulated based on direct ink writing.Model and experimental results show a remarkable link between strut size and printing pressure and moving speed,but no such link exists between strut size and nozzle height.The paste can be printed into various complex structures by direct ink writing devices.Complex structures of aluminum alloys can be fabricated by metal infiltration and leaching of salt templates.This work provides a new reference technology for fabricating aluminum alloys with complex structures in the future.
