Microstructure, thermal conductivity and simulation of elastic modulus of MAX-phase (Ti2AlC) gel-cast foams
Microstructure, thermal conductivity and simulation of elastic modulus of MAX-phase (Ti2AlC) gel-cast foams
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DOI：
10.1016/j.jeurceramsoc.2018.04.012
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发表时间：
2018-08-01
影响因子：
5.7
通讯作者：
Potoczek, Marek
中科院分区：
文献类型：
--
作者：
Fey, Tobias;Stumpf, Martin;Potoczek, Marek
研究了以琼脂糖为胶凝剂制备的MAX相（Ti 2AlC）凝胶浇注泡沫材料的显微结构、力学性能和热性能。用扫描电镜和X射线显微层析对制备的Ti 2AlC泡沫进行了显微结构分析。采用脉冲激励技术测定了Ti 2AlC泡沫的杨氏模量。用Gibson-Ashby、Spnggs和交叉性质关系模型对实验数据进行了关联。热导率测量通过与源自pCT测量的Ti 2AlC泡沫结构中的孔网络相关的激光闪光分析进行。在真实的结构模型上进行了有限元模拟，以确定载荷下的支柱方向应力分布。
MAX-phase (Ti2AlC) gel-cast foams manufactured using agarose as gelling agent were investigated in terms of their microstructural, mechanical and thermal properties. The microstructural analysis of Ti2AlC foams made using SEM were compared with those using X-ray micro tomography. The Young's Modulus of Ti2AlC foams was determined using the impulse excitation technique. This experimental data was correlated with the GibsonAshby, Spnggs and Cross-property relation models. The thermal conductivity measurements were carried out by Laser-Flash analysis correlating to the pore network in the Ti2AlC foam structure derived from pCT measurement. FEM-simulations of the mechanical behaviour were carried out on real structure models to determine a strut wise stress distribution under load.