Ice templating of ZrB2 porous architectures
作者： Elena Landi , Diletta Sciti , Cesare Melandri , Valentina Medri
DOI: 10.1016/J.JEURCERAMSOC.2013.01.037
关键词: Ceramic 、 Sublimation (phase transition) 、 Porosity 、 Mold 、 Ice crystals 、 Materials science 、 Replica 、 Anisotropy 、 Zirconium diboride 、 Composite material
摘要: Abstract For the first time, freeze casting of aqueous ZrB 2 based suspension was performed in order to produce porous architectures with main unidirectional anisotropic pores interconnected by diffuse globular-isotropic pores. The porosity characterizing green bodies after sublimation process is replica ice crystals. effects solid content, stabilization and cold transmission depending on mold type were studied since micro macrostructure and, hence, properties sintered body are determined controlling growth direction crystals during freezing. Improved mechanical performances obtained changing above mentioned parameters, virtue formation thinner more homogenously distributed ceramic lamellae. Possible applications these materials include high temperature volumetric absorbers for concentrating solar power systems.
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