Additive Manufacturing of Porous Ceramics With Foaming Agent
Additive Manufacturing of Porous Ceramics With Foaming Agent
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DOI：
10.1115/msec2021-63493
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发表时间：
2021-06
期刊：
影响因子：
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通讯作者：
Zipeng Guo;Lu An;Sushil Lakshmanan;J. Armstrong;Shenqiang Ren;Chi Zhou
中科院分区：
文献类型：
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作者：
Zipeng Guo;Lu An;Sushil Lakshmanan;J. Armstrong;Shenqiang Ren;Chi Zhou
大孔陶瓷具有良好的耐久性和隔热性能。本文报道了一种用于制造大孔陶瓷的具有成本效益和可扩展性的增材制造技术，该技术具有简单的方法来控制打印的孔隙率。制备了几种陶瓷油墨，使用发泡剂在油墨中产生气泡，然后通过直接油墨书写和常压和室温干燥来创建三维几何形状。进行了实验研究，以优化印刷质量。一组研究揭示了用于印刷具有高空间分辨率和精细表面质量的泡沫陶瓷油墨的最佳印刷工艺参数。改变发泡剂的浓度使得能够控制结构孔隙率。最大孔隙率可达85%，内部无裂纹多孔结构。拉伸试验表明，纤维的加入提高了印刷大孔陶瓷的耐久性。通过高保真的3D打印工艺和对孔隙率的精确控制，打印的样品表现出低导热性和高机械强度。
The macro-porous ceramics has promising durability and thermal insulation performances. A cost-effective and scalable additive manufacturing technique for the fabrication of macro-porous ceramics, with a facile approach to control the printed porosity is reported in the paper. Several ceramic inks were prepared, the foaming agent was used to generate gaseous bubbles in the ink, followed by the direct ink writing and the ambient-pressure and room-temperature drying to create the three-dimensional geometries. The experimental studies were performed to optimize the printing quality. A set of studies revealed the optimal printing process parameters for printing the foamed ceramic ink with a high spatial resolution and fine surface quality. Varying the concentration of the foaming agent enabled the controllability of the structural porosity. The maximum porosity can reach 85%, with a crack-free internal porous structure. The tensile tests showed that the printed macro-porous ceramics have enhanced durability with the addition of fiber. With a high-fidelity 3D printing process and precise control of the porosity, the printed samples exhibited a low thermal conductivity and high mechanical strength.