Microstructural, mechanical and thermal characterization of alumina gel-cast foams manufactured with the use of agarose as gelling agent
Microstructural, mechanical and thermal characterization of alumina gel-cast foams manufactured with the use of agarose as gelling agent
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DOI：
10.1007/s10934-015-0009-7
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发表时间：
2015-10-01
影响因子：
2.6
通讯作者：
Potoczek, Marek
中科院分区：
文献类型：
--
作者：
Fey, Tobias;Zierath, Bodo;Potoczek, Marek
对使用琼脂糖作为胶凝剂制造的氧化铝凝胶泡沫的微观结构、机械和热性能进行了检查。将氧化铝泡沫的微观结构 SEM 测量结果与孔网络上的 X 射线显微断层扫描研究进行了比较。氧化铝泡沫的杨氏模量通过脉冲激励和超声波声速测量来确定。这两种独立的技术显示出相似的结果。吉布森和阿什比的完全开孔和闭孔泡沫模型与压缩测试的实验数据进行了比较。使用激光闪光分析进行的热导率测量与氧化铝泡沫结构中的孔隙网络相关。
Alumina gel-cast foams manufactured by using agarose as gelling agent were examined in terms of microstructural, mechanical and thermal properties. The microstructural SEM measurements of alumina foams were compared with X-ray micro tomography investigations also on the pore network. Young's modulus of alumina foams was determined by impulse excitation and ultrasonic sound velocity measurements. These two independent techniques showed similar results. Gibson and Ashby's model of completely open-cell and closed-cell foams was compared with experimental data from compression tests. The thermal conductivity measurements using laser-flash analysis were correlated with the pore network in the alumina foam structure.