PROCESSING CHARACTERISTICS OF AL W COMPOSITE UNDER 1-G CONDITIONS/

The segregation features and interface characteristics in an Al/W comp osite system processed through liquid metallurgy technique under 1 g c onditions has been studied. The effect of various melting parameters o n the Al/W system containing 60 wt% (about 20 at%) tungsten particles, was investigated and the consequent metallographic features of these composites were studied. Although most of the segregation of tungsten particles was observed at the bottom of the sample, segregation was al so noticed towards the side watts and the top portion of the sample. T he segregation pattern is explained in terms of force under Stoke's la w and conventional convection. The formation of intermetallic compound s between aluminium and tungsten, and limited solubility between these two elements, is also reported.