Obtaining complex-shaped oxide ceramic composites via ionotropic gelation
Obtaining complex-shaped oxide ceramic composites via ionotropic gelation
复制标题
通过离子凝胶化获得复杂形状的氧化物陶瓷复合材料
DOI：
10.1111/jace.15990
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发表时间：
2019
影响因子：
3.9
通讯作者：
Rezwan K
中科院分区：
文献类型：
--
作者：
Almeida RSM;Pereira TFS;Tushtev K;Rezwan K
在这篇文章中，我们提出了一种基于离子致凝胶技术获得氧化物陶瓷复合材料的新的加工方法。Nextel 610纤维织物用总固含量为50vol%的氧化铝-氧化锆悬浮液浸渍，以海藻酸盐为粘结剂。随后，通过添加Al3+阳离子使悬浮液缓慢交联并转变为凝胶状态。凝胶布料层可以很容易地裁剪、堆叠和成型，也可以连接到其他陶瓷材料和复合材料上。此外，还可以通过将各层压在一起来调整纤维含量。综上所述，采用该工艺制备的复合材料具有很好的纤维束浸润性、良好的孔隙率和良好的力学性能。Nextel 610/氧化铝-氧化锆基复合材料在1200℃下烧结1h，抗弯强度为306 Mpa，层间剪切强度为9.8 Mpa，名义断裂韧性为13.6 Mpa m0.5。
In this communication, we present a new processing method for obtaining oxide ceramic composites based on the ionotropic gelation technique. Nextel 610 fiber fabrics were infiltrated by an alumina‐zirconia suspension with a total solid content of 50 vol% and alginate as the binder. Subsequently, the suspension was slowly cross‐linked by adding Al3+cations and transferred to a gel state. The gelled fabric layers could be easily cut, stacked and shaped, as well as joined to other ceramic materials and composites. Furthermore, the fiber content could be adjusted by pressing the layers together. In summary, the composites produced with this technique presented a very good fiber bundle infiltration, matrix with fine porosity and excellent mechanical properties. Nextel 610/alumina‐zirconia composites sintered at 1200°C for 1 hour showed bending strength of 306 MPa, interlaminar shear strength of 9.8 MPa and nominal fracture toughness of 13.6 MPa m0.5.
影响因子：
5.2
作者：
Guglielmi, Paula O.;Blaese, Diego;Janssen, Rolf
通讯作者：
Janssen, Rolf
影响因子：
5.7
作者：
Haslam, JJ;Berroth, KE;Lange, FF
通讯作者：
Lange, FF