陶瓷面曝光快速成型工艺研究

发布时间：2018-05-03 23:43

本文选题：D打印 + 光固化　；参考：《机械工程学报》2017年07期

【摘要】：利用投影机中微小反射镜阵列(Digital micromirror device,DMD)形成投影图案,以发光二极管紫外光(UV-LED)作为光源,建立了陶瓷面曝光快速成型试验系统。利用该系统研究了自开发的可光固化磷酸钙陶瓷浆料的光固化性能,确定了其临界曝光强度为14.24 mJ/cm~2,透射深度为149μm;优化了面曝光陶瓷成型的工艺参数,即分层厚度100μm,曝光强度54 mJ/cm~2,曝光时间3 s,并实现了带有复杂网状结构的陶瓷多孔支架的制造。该工艺所成型的陶瓷零件经烧结后,其致密表面和内部未见有裂纹和较大孔洞,压缩强度高达63MPa,可满足骨组织工程支架的机械性能要求。所述的面曝光快速成型工艺可直接成型多孔以及复杂结构的陶瓷零件,有望为陶瓷骨组织支架的制造提供新的发展方向。
[Abstract]:A rapid prototyping test system for ceramic surface exposure was established by using the projection pattern of the micro mirror array digital micromirror device DMD in the projector and the ultraviolet light emitting diode (UV-LED) as the light source. The system was used to study the photocuring properties of the self-developed photocurable calcium phosphate ceramic paste. The critical exposure strength was 14.24 mg / cm ~ (-2) and the transmission depth was 149 渭 m. The layer thickness is 100 渭 m, the exposure intensity is 54 mg / cm ~ (-2), and the exposure time is 3 s. The fabrication of porous ceramic scaffolds with complex mesh structure is realized. After sintering, there are no cracks and large holes on the compact surface and inside of the ceramic parts, and the compressive strength is as high as 63 MPA, which can meet the requirements of mechanical properties of bone tissue engineering scaffolds. The surface exposure rapid prototyping process can directly form porous and complex ceramic parts, which is expected to provide a new development direction for the fabrication of ceramic bone scaffolds.
【作者单位】：西安交通大学机械制造系统工程国家重点实验室;西安交通大学快速制造国家工程研究中心;西安交通大学高端制造装备协同创新研究中心;
【基金】：国家自然科学基金(51323007,51375371) 陕西科技厅(2016GY-201,2016KTZDGY07-01) 广东科技厅(2016B090915002)资助项目
【分类号】：TQ174.6

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