FUNCTIONALLY GRADED ALUMINIUM ALLOY BASED IN-SITU METAL MATRIX COMPOSITES (FG-AMC)

摘要

A process for the manufacture of functionally graded, aluminium based in-silu metal matrix composites (VG-AMC) comprising the steps of drying a mixture selected from (KjTiFf, - KBF4) and (K^TiFb + graphite) in an oven maintained at I50°C for T hour to remove the moisture completely and minimize hydrogen pick up in the melt-, the salts he'mg blended thoroughly to get a homogeneous mixture; wrapping the selected mixture in Al foils in small packets: degassing the melt when it reaches the predetermined temperature: adding the sah mixture to the melt gradually (in small packets) with continuous stirring to ensure uniform mixing and reaction throughout the melt: decanting the dross floating on top of the meft and pouring the cfestn mett (composite) into a centrifugal casting mold.