Abstract

Interfacial microstructure of Al4C3in SiC/Al-Mgcomposite fabricated by melt spinning technique

Author(s): EmadM.Ahmed

Al–10 wt.%Mg alloy was reinforced with 2wt.% SiCnanoparticles by vortex techniques then rapidly solidified by melt spinning. Particle interaction with metal-matrix and tensile properties in as-spuncondition were studied. The resulting as-spuncomposite structurewas analyzed using DTA, XRD, SEMand EDX. The microstructure showed excellent distribution of Mg, Si and Cinto Al matrix. In addition, it was proved the formation of Al4C3nanosheetof two dimensional nano-walls in as-spun state. Moreover, XRD peaks shift of á-Al and the absence of XRD peaks corresponding to Al-Mg phases refer to the formation of supersaturated solid solution of Mg in á-Al. Ultimate tensile strength of the as spun ribbons was as high as 300 MPa. This improvement in the microstructure and tensile properties may be attributed to the supersaturated solid solution of Mg in á-Al and the formation of Al4C3 two dimensional nano-walls in melt spun state.