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The fabrication of complex-shaped alumina ceramics following a new near-net shape technique based on hydrolysis induced aqueous gelcasting (GCHAS) is reported in this paper. Aqueous suspension containing 50vol.% solids loading was prepared by dispersing alumina in an aqueous solution of methacrylamide and methlynebisacrylamide (17wt.% in 6:1) using polycarboxylic acid as dispersing agent. Consolidation...
This paper reports on process dependant microstructural and mechanical properties of MgAl 2 O 4 spinel (MAS) ceramics. Two MAS powders with different chemical compositions were synthesized by solid-state reaction of alumina and calcined caustic magnesia at 1400°C for 1h. The surface of the as obtained MAS powders was passivated against hydrolysis by coating it with H 3 PO ...
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