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Research paper thumbnail of Microstructure and interface characteristics of B< sub> 4</sub> C, SiC and Al< sub> 2</sub> O< sub> 3</sub> reinforced Al matrix composites: a comparative study

Journal of materials …, 2003

Three aluminium metal matrix composites containing reinforcing particles of B 4 C, SiC and Al 2 O... more Three aluminium metal matrix composites containing reinforcing particles of B 4 C, SiC and Al 2 O 3 (0-20 vol.%) were processed. The stir-casting manufacturing route followed by hot extrusion was utilized, being one of the cost-effective industrial methods. A clear interfacial reaction product/layer was found at Al-SiC interface for composites held for a relatively long processing time (>30 min). No reaction product was observed at Al-B 4 C and Al-Al 2 O 3 interfaces at the resolution limit of the SEM used. On the other hand, two secondary phases (alumina and another phase containing aluminium, boron and carbon) were found in the aluminum matrix away from the interface in Al-B 4 C composites. From the fracture surface analysis, B 4 C reinforced Al composite seemed to exhibit a better interfacial bonding compared to the other two composites. .bd (A.S.M.A. Haseeb).

Research paper thumbnail of Microstructure and interface characteristics of B< sub> 4</sub> C, SiC and Al< sub> 2</sub> O< sub> 3</sub> reinforced Al matrix composites: a comparative study

Journal of materials …, 2003

Three aluminium metal matrix composites containing reinforcing particles of B 4 C, SiC and Al 2 O... more Three aluminium metal matrix composites containing reinforcing particles of B 4 C, SiC and Al 2 O 3 (0-20 vol.%) were processed. The stir-casting manufacturing route followed by hot extrusion was utilized, being one of the cost-effective industrial methods. A clear interfacial reaction product/layer was found at Al-SiC interface for composites held for a relatively long processing time (>30 min). No reaction product was observed at Al-B 4 C and Al-Al 2 O 3 interfaces at the resolution limit of the SEM used. On the other hand, two secondary phases (alumina and another phase containing aluminium, boron and carbon) were found in the aluminum matrix away from the interface in Al-B 4 C composites. From the fracture surface analysis, B 4 C reinforced Al composite seemed to exhibit a better interfacial bonding compared to the other two composites. .bd (A.S.M.A. Haseeb).

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