Abstract
The purpose of this note is to report the identification of a ternary (XI) phase which has been observed as a reaction product during the processing of B4C-Al composites. These ceramic-metal composites (cermets) have the unique potential for structural applications because of their low density (> 2.6 g/cc) and a desirable combination of mechanical properties. Guidelines for the processing of B4C-Al have been successfully established; and now it is possible to produce tailored microstructures with varying amounts of constituent phases.The samples for the analysis were prepared by the following procedure. First, it was necessary to heat the B4C powder compacts in excess of 2000°C to attain an interconnected B4C skeletal structure. Liquid aluminum was then infiltrated into this B4C network at 1170°C.
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