Abstract
Thin-wall geometry implies a regular network of holes in a bulk, centimetric sample so thatits effective thickness can be considered to be smaller than 1.5 mm. Thin-wallgeometry offers a significant potential for helping the oxygenation process, mechanicalreinforcement and thermal stabilization. Thin-wall geometry was obtained bydrilling holes in slightly sintered pellets or by pressing pellets with embeddedneedles. The growth of a single domain, up to 50 mm in diameter, on such thin-wallgeometry pellets was confirmed, despite the presence of many-hole patterns, by insitu high-temperature video monitoring. A significant decrease of porosity andcracks is observed, associated with the reduction of diffusion paths produced bythin-wall geometry. The improvement of the material quality is established by asignificant increase (about 40%) of the magnetic trapped field in thin-wall samples.
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