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Ceramic core with macroscopic porous structure and preparation method thereof
The invention provides a ceramic core with a macroscopic porous structure and a preparation method of the ceramic core, and belongs to the technical field of 3D printing forming. The preparation method comprises the following steps: drawing three types of extremely-small curved surface lattice structure models with different configurations through modeling software, forming a ceramic core blank with an extremely-small curved surface structure by taking aluminum oxide slurry as a raw material and adopting a 3D printing technology, and performing degreasing and high-temperature sintering to complete the preparation process of the ceramic core. The prepared ceramic core has a precise internal structure, the porosity and the strength of the core are both high by precisely controlling the shape, the hole diameter and the porosity of the internal holes of the core, the porosity of the core is 50%-70%, and the bending strength of the core is 54.95 MPa-139.06 MPa. Moreover, the special structure of the extremely small curved surface is utilized, so that the flowability of an alkaline solution during core removal is improved, and the core removal performance of the aluminum oxide ceramic core is further improved.
本发明提供了一种具有宏观多孔结构的陶瓷型芯及其制备方法，属于3D打印成型技术领域。本发明通过建模软件绘制三种不同构型极小曲面点阵结构模型，以氧化铝浆料为原料，采用3D打印技术成形具有极小曲面结构的陶瓷型芯坯体，经脱脂及高温烧结，完成陶瓷型芯的制备过程。本发明制备的陶瓷型芯具有精密的内部结构，通过对型芯内部孔形态、孔径、孔隙率的精准控制，实现了型芯孔隙率与强度的双高，其孔隙率为50％～70％，弯曲强度为54.95MPa～139.06MPa。并且，本发明利用极小曲面这一特殊结构，增大了脱芯时碱性溶液的流动性，进一步提升了氧化铝陶瓷型芯的脱芯性能。
Ceramic core with macroscopic porous structure and preparation method thereof
The invention provides a ceramic core with a macroscopic porous structure and a preparation method of the ceramic core, and belongs to the technical field of 3D printing forming. The preparation method comprises the following steps: drawing three types of extremely-small curved surface lattice structure models with different configurations through modeling software, forming a ceramic core blank with an extremely-small curved surface structure by taking aluminum oxide slurry as a raw material and adopting a 3D printing technology, and performing degreasing and high-temperature sintering to complete the preparation process of the ceramic core. The prepared ceramic core has a precise internal structure, the porosity and the strength of the core are both high by precisely controlling the shape, the hole diameter and the porosity of the internal holes of the core, the porosity of the core is 50%-70%, and the bending strength of the core is 54.95 MPa-139.06 MPa. Moreover, the special structure of the extremely small curved surface is utilized, so that the flowability of an alkaline solution during core removal is improved, and the core removal performance of the aluminum oxide ceramic core is further improved.
本发明提供了一种具有宏观多孔结构的陶瓷型芯及其制备方法，属于3D打印成型技术领域。本发明通过建模软件绘制三种不同构型极小曲面点阵结构模型，以氧化铝浆料为原料，采用3D打印技术成形具有极小曲面结构的陶瓷型芯坯体，经脱脂及高温烧结，完成陶瓷型芯的制备过程。本发明制备的陶瓷型芯具有精密的内部结构，通过对型芯内部孔形态、孔径、孔隙率的精准控制，实现了型芯孔隙率与强度的双高，其孔隙率为50％～70％，弯曲强度为54.95MPa～139.06MPa。并且，本发明利用极小曲面这一特殊结构，增大了脱芯时碱性溶液的流动性，进一步提升了氧化铝陶瓷型芯的脱芯性能。
Ceramic core with macroscopic porous structure and preparation method thereof
一种具有宏观多孔结构的陶瓷型芯及其制备方法
HE RUJIE (author) / ZHAI XIAOFEI (author) / ZHANG XUEQIN (author) / CHEN JINGYI (author) / CHEN XIAOTONG (author) / GAO XIONG (author)
2024-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B22C
FOUNDRY MOULDING
,
Gießformen
/
B33Y
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
,
Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern
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