Three alternative manufacturing techniques for ceramic foams are compared in this article: a reaction bonded‐modified (RB) polyurethane replica technique, gel casting, and a method of hollow building blocks (see Figure for a sample built up by different hollow spheres). The strength of the ceramic foams was tested by 3p‐bending and compression. Also, structural parameters were characterized by image analysis and computer‐assisted x‐ray tomography.
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Luyten et al. (2003) studied this question.
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