Sol-gel infiltration of complex cellular indirect 3D printed alumina
Sol-gel infiltration of complex cellular indirect 3D printed alumina
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复杂细胞间接 3D 打印氧化铝的溶胶-凝胶渗透
DOI：
10.1016/j.jeurceramsoc.2018.04.023
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发表时间：
2018
影响因子：
5.7
通讯作者：
T. Fey
中科院分区：
文献类型：
--
作者：
M. Stumpf;N. Travitzky;P. Greil;T. Fey
开发了含有可溶性前体水合氯化铝的凝胶水溶液，用于渗透多孔间接3D打印氧化铝。粘度和振幅扫描测试证实了凝胶形成和剪切变稀行为有利于随后的涂覆和渗透过程。高温XRD证实了在1000 °C的温度下形成了氧化物。通过间接3D打印实现了具有高表面积和各向同性孔道的复杂氧化铝结构。预烧结氧化铝的涂覆和渗透以及随后的烧结步骤将前体转化为多孔性，并在3D打印后部分填充残余孔隙并减少表面缺陷。在凝胶涂层的情况下，观察到最大值Δσcompr= 61.9 MPa的显著改善，并且在凝胶渗透的情况下，最大改善ΔE = 136.2 GPa。结果表明，渗透的可能性，甚至复杂的氧化铝结构与水性氧化铝前体，而不需要分散陶瓷颗粒。
Gelled aqueous solutions containing the soluble precursor aluminum chlorohydrate were developed for the infiltration of porous indirect 3D printed alumina. Viscosity and amplitude sweep tests confirmed the gel formation and sheer thinning behavior beneficial for the subsequent coating and infiltration process. High temperature XRD confirmed the formation of corundum at a temperature of 1000 °C. Complex alumina structures with high surface area and isotropic pore channels were achieved by indirect 3D printing. Coating and infiltration of the pre sintered alumina with a subsequent sintering step transformed the precursor to corundum and partially filled the residual porosity and decreased surface defects after 3D printing. With the gel coating a pronounced improvement up to a maximum value of Δσcompr= 61.9 MPa was observed and with the gel infiltration a maximum improvement of ΔE = 136.2 GPa. The results show the possibility to infiltrate even complex alumina structures with aqueous alumina precursors without the need to disperse ceramic particles.
DOI：
--
发表时间：
1972
期刊：
影响因子：
--
作者：
Taichi Sato
通讯作者：
Taichi Sato
以聚乙烯醇模板剂为孔隙控制添加剂合成介孔氧化铝
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Z. Ecsedi;I. Lazău;C. Păcurariu
通讯作者：
C. Păcurariu