基于DLP技术打印制备聚合物转化陶瓷基复合材料的研究  

Digital Light Processing-based Fabrication of Polymer-derived Ceramic Matrix Composites

作　　者：欧俊 黄民忠 黄瑶 姜知水 伍尚华[1] OU Jun;HUANG Minzhong;HUANG Yao;JIANG Zhishui;WU Shanghua(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,Guangdong,China;Guangdong JC Technological Innovation Eletronics CO.,LTD,Zhaoqing 526060,Guangdong,China)

机构地区：[1]广东工业大学机电工程学院,广东广州510006 [2]广东捷成科创电子股份有限公司,广东肇庆526060

出　　处：《陶瓷学报》2023年第1期154-162,共9页Journal of Ceramics

基　　金：广东省重点领域研发计划(2020B090923002);肇庆市西江创新团队引进项目;佛山市科技创新团队项目(FS0AA-KJ919-4402-0023)。

摘　　要：将含惰性填料(Si3N4晶须)的陶瓷前驱体/光敏树脂浆料经数字光处理(DLP)3D打印技术成功制备出了复杂结构的生坯,经热解后生坯转化为聚合物转化陶瓷基复合材料,并能完好地保持其形貌和结构。引入的填料不仅可以避免大块生坯在热解过程中崩塌,还能有效降低陶瓷材料的线性收缩率和失重率,并且其作为增强相可以显著提高复合材料的力学性能。当填料含量为10 wt.%时,复合材料的抗弯强度可达(160.9±19.7)MPa。此外,还讨论了填料含量对复合材料微观结构和孔隙率的影响,发现过量的填料会导致复合材料孔隙缺陷增加,基体连续性降低,从而降低复合材料的力学性能。Green parts with complex structures were successfully fabricated from preceramic polymer/photosensitive resin slurries containing inert fillers(Si3N4whiskers)by using digital light processing(DLP)3D-printing technique. After pyrolysis, the green parts were transformed into polymer-derived ceramic matrix composites, their morphology and structure intact were retained. The introduction of the ceramic fillers not only prevented the collapse of the green parts during pyrolysis, but also effectively reduced the linear shrinkage and weight loss of the ceramic materials. Also, as a reinforcing phase, it significantly improved mechanical properties of the final composites. When the mass fraction of filler content was 10 wt.%, the bending strength of the composites could reach(160.9 ± 19.7)MPa. In addition, the effects of filler content on the microstructure and porosity of the composites were discussed. It was found that excessive filler would lead to an increase in porosity and a decrease in matrix continuity, resulting in a decrease in mechanical properties of the composites.

关 键 词：3D打印 陶瓷前驱体 复合材料 力学性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]