Freeze Casting as a Nanoparticle Material‐Forming Method - Progress in Nanotechnology - Wiley Online Library

Nanoparticle material forming is challenging because of loose packing and agglomeration issues intrinsic to nanoparticles. Liquid processing shows great potential to overcome such hurdles. This chapter focuses on nanoparticle colloidal processing and freeze-casting forming. Al₂O₃ nanoparticle suspensions are examined, and microstructure evolution of Al₂O₃ nanoparticle suspension during freeze casting is discussed. The “Fines” effect influences nanoparticle packing on freeze-east sample surfaces. Trapped air bubbles in the suspension lead to a porous bulk microstructure. Prerest is necessary for dense and homogeneous green microstructure formation. The green strength, fracture mode, and ability to form fine features by freeze casting are also evaluated in the chapter.

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