叠层实体工艺制备可控孔隙结构多孔陶瓷

Preparation of Ceramics with Controllable Porous Architecture by Laminated Object Manufacturing

为了得到具有可控孔结构多孔陶瓷,采用叠层实体工艺,使用聚乙烯网格布作为骨架制作陶瓷坯体片材,通过激光切割得到目标形状后,由叠层工艺装置对片材进行粘接得到目标坯体,通过烧结得到具有可控孔隙结构的多孔陶瓷。结果表明:通过改变网格布结构,得到的可控结构多孔陶瓷孔隙率可达65.49%,压缩强度可达36.10 MPa。并且随着网格密度增加,通孔直径减小,孔隙率减小,体积密度增大,压缩强度增大。

In order to obtain the ceramics with controllable pore structure, the laminated object manufacturing was used to make the ceramic sheet with the polyethylene mesh as the skeleton. After being cut by laser into desirable shapes, the ceramic sheets were bonded by the laminating processer to get the target body. After sintering, ceramics with controllable porous architecture were obtained. Test results show that the porosity of the ceramic with controllable porous architecture can reach 65.49% and the compressive strength can reach 36.10 MPa by changing the grid structure. Moreover, as the mesh density increases, the aperture and the porosity decrease, but the bulk density and the compressive strength increase.