Abstract
The Displacive Compensation of Porosity (DCP) method is a novel, reactive infiltration approach for fabricating dense, near net-shaped, ceramic/metal composites with high ceramic contents at modest temperatures. In this process, a metallic liquid is pressureless infiltrated into a porous, shaped ceramic preform and allowed to undergo a displacement reaction with the ceramic phase in the preform. Unlike other reactive infiltration approaches, a larger volume of ceramic is produced than is consumed, so that the prior pore volume within the preform becomes filled (i.e. reaction-induced densification). In this paper, the DCP method is used to fabricate MgO/Fe-Al intermetallic composites. Dense MgO/FeAl-based composites were produced by the pressureless infiltration of Mg(1) into, and then reaction with, porous MgAl 2 O 4 /MgO/Fe-bearing preforms within 2 h at 1000°C.
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