Superplastically Foaming Method for Reliable Porous Ceramics
Superplastically Foaming Method for Reliable Porous Ceramics
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DOI：
10.4028/www.scientific.net/msf.735.109
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发表时间：
2012-12
期刊：
影响因子：
--
通讯作者：
A. Kishimoto;T. Nakagawa;T. Teranishi;H. Hayashi
中科院分区：
文献类型：
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作者：
A. Kishimoto;T. Nakagawa;T. Teranishi;H. Hayashi
多孔陶瓷包含孔以改善几种性质，包括热绝缘，保持固有的陶瓷性质，如耐腐蚀性和大的机械强度。传统的多孔陶瓷通常通过不充分的烧结来制造，导致强度和耐久性降低。与此相反，我们创新了超塑性发泡方法，使陶瓷泡沫仅在固态下。在该方法中，先前插入的发泡剂在基体在烧结温度附近完全致密化之后蒸发。封闭的孔隙利用释放的气体压力驱动的超塑性变形而膨胀。在此基础上制备了8mol%氧化钇稳定氧化锆基多孔陶瓷，并研究了其作为高温隔热结构材料的性能。
Porous ceramics incorporates pores to improve several properties including thermal insulation, maintaining inherent ceramic properties such as corrosion resistance and large mechanical strength. Conventional porous ceramics is usually fabricated through an insufficient sintering, leading to degraded strength and durability. Contrary to this, we have innovated superplastically foaming method to make ceramic foam only in the solid state. In this method, the previously inserted foam agent evaporates after the full densification of matrix at around the sintering temperature. Closed pores expand utilizing the superplastic deformation driven by the evolved gas pressure. Based on this concept we fabricated 8mol% yttria stabirized zirconia based porous ceramics and examined the properties concerning the high temperature structural material with thermal insulation.