Research Trends and Challenges of Additive Manufacturing of Polymer-derived Ceramics

Abstract

As an emerging manufacturing technology, additive manufacturing technology, also known as 3D printing technology, has received extensive attention in recent years. Additive manufacturing technology has great potential in the industry of high-performance ceramics. It is expected to break the technical bottle neck of the traditional manufacturing technologies used for ceramic fabrication and greatly improve the flexibility of design and manufacturing of highperformance ceramics. This will provide a transformative impetus for the development of the manufacturing technology of the high-performance ceramic materials. Polymer-derived ceramics (PDCs) are a class of polymers obtained by chemical methods and can transform into ceramics by heat treatments, i.e., pyrolysis. Due to the good machinability and formability of the PDC materials themselves, the pre-forming of the designed target structures can be easily realized. These structures might not be possible with traditional ceramic manufacturing. Therefore, the combination of PDCs and additive manufacturing technology has attracted great attention from researchers. This review will introduce the characteristics of the additive manufacturing technology used for preceramics. Based on that, the present research status, trends and applications are also systematically described and discussed. The challenges and future directions of the additive manufacturing of polymer-derived ceramics are given in the end for guidance of future development.

Textured Porous Al2O3-SiO2 Composite Ceramic Platelet-sphere Slurry: Characteristics and Simulation of Light Intensity Distribution

“…Key words: ceramic stereolithography; Al 2 O 3 -SiO 2 composite ceramic; alumina platelet; light intensity distribution simulation; slurry characterization 陶瓷光固化技术 [1] 具有成型精度高、工艺灵 活、设备成本较低等优势。该技术能够打印氧化物 陶瓷 [2] 、碳化物或氮化物陶瓷 [3][4] 、前驱体陶瓷等材 料 [5] , 制造的陶瓷制件可应用于能源 [6] 、医疗植入 物 [7] 、微芯片 [8][9] 、压电 [10] 、催化 [11][12] 、叶片铸造 [13] 等领域。近年来, 采用陶瓷光固化技术制备二氧化 硅复合氧化铝陶瓷型芯 [14][15][16] 和莫来石陶瓷型芯 [17][18] 得到了广泛研究, 例如由前驱体复合氧化铝浆料制 备复杂结构陶瓷 [17] 、二氧化硅强化氧化铝陶瓷 [14] 等。由此可见, 光固化技术在制备 [19][20] ; 或由二氧化硅粗糙化的片状氧化铝(SiO 2 @Al 2 O 3 ) 获得 [21][22] [24][25][26] , 这些研究从理论、实验、仿真角度 [23,[26][27] 分析了粉体和树脂对固化特性的影响 [28] , 然而混合 有显著形貌差异粉体的陶瓷浆料, 研究其光固化特性 的文献较少。 片状氧化铝是一种具有高径厚比特性的粉体, 其形貌特征与等轴状的颗粒粉体差异较大。浆料中 片状氧化铝会影响浆料的固化性能, 并且粉体的 固相含量配比也会影响浆料的固化特性以及黏度 特性 [29]…”