DEVELOPMENT OF Al-Si-Fe/SiC PARTICULATE COMPOSITES AS ADVANCED MATERIALS FOR ENGINEERING APPLICATION

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dc.contributor.authorAIGBODION, VICTOR SUNDAY
dc.date.accessioned2014-04-08T09:31:41Z
dc.date.available2014-04-08T09:31:41Z
dc.date.issued2007-08
dc.descriptionDEPARTMENT OF METALLURGICAL ENGINEERING, AHMADU BELLO UNIVERSITY, ZARIA NIGERIA THESIS SUBMITTED TO THE POST-GRADUATE SCHOOL AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF MASTER OF SCIENCE (M.Sc) DEGREE IN METALLURGICAL ENGINEERING August, 2007en_US
dc.description.abstractThis work has been carried out to develop a particulate strengthened Al-Si-Fe composites using silicon carbide as the particulate. Al-Si-Fe alloy with 5-25 weight percent silicon carbide particles were produced using the double stir casting method. The composites were heat-treated at 500oC for 3hours and quenched in warm water at 65oC, aged at100, 200 and 300oC with various ageing times between 60 to 660minutes. The micro structures of the various alloy particulate composites produced were examined. The physical and mechanical properties measured include: densities, porosity, ageing kinetic, ultimate tensile strength, yield strength, hardness values and impact energy. The result obtained reveals hardness values and activation energy of diffusion increased with increase in the weight fraction of silicon carbide and accelerates the kinetic of ageing. The yield strength and ultimate tensile strength increased by a maximum of 20% silicon carbide addition with general decrease in impact energy. These results show that at 20% silicon carbide addition the composites has 9.15%, 17.79%, 29.17% and 29.85% increases in yield strength, tensile strength, impact energy and hardness respectively over that of the as-cast samples at peak ageing of 200OC. The increases in mechanical properties (tensile, impact and hardness) during ageing, was attributed to formation of a coherent and uniform precipitation of the second phase in the matrix of the metal, which resulting from increase in the dislocation density at the particles-matrix interfaces. These results show that the Al-Si-Fe alloy has been well enhanced by the addition of silicon carbide using double stir casting method.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/4650
dc.language.isoenen_US
dc.subjectDEVELOPMENT,en_US
dc.subjectPARTICULATE,en_US
dc.subjectCOMPOSITES,en_US
dc.subjectADVANCED,en_US
dc.subjectMATERIALS,en_US
dc.subjectENGINEERING,en_US
dc.subjectAPPLICATIONen_US
dc.titleDEVELOPMENT OF Al-Si-Fe/SiC PARTICULATE COMPOSITES AS ADVANCED MATERIALS FOR ENGINEERING APPLICATIONen_US
dc.typeThesisen_US
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