Fabrication And Characterization Of Lead Free Pewter Alloys

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dc.contributor.authorChou, Soklin
dc.date.accessioned2018-12-03T07:10:35Z
dc.date.available2018-12-03T07:10:35Z
dc.date.issued2011-08
dc.description.abstractLead free pewter alloys with various composition Sn-(1-3%wt)Cu and Sn-(1- 3%wt)Al binary alloys and Sn-(1-3%wt)Cu-(5-7%wt)Sb ternary alloys were prepared by mixing raw materials, melting, homogenizing, and casting in a mild steel die. The alloy samples were characterized for phase identification via X-ray diffraction (XRD) analysis, and thermal behaviour via differential scanning calorimetry (DSC). Microstructures of the alloys were studied by using optical microscope (OM), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) analysis. The mechanical and physical properties of lead free pewter alloys were characterized via density test, hardness test, tensile test, castability test and surface appearance observation. A comparison was made by using commercial pewter alloy (CPA). XRD, FESEM, and EDX analysis of the alloys indicated the formation of intermetallic phase which may be responsible for the required hardening of Sn-based alloys. The intermetallic compound of Cu6Sn5 found in Sn-Cu pewter alloys resulted in higher hardness. On the other hand, formation of intermetallic compound of Cu6Sb5 and SbSn increase the hardness of Sn-Cu-Sb pewter alloys. However, these intermetallic compounds were found to deteriorate elongation of pewter alloys. DSC, FESEM, and EDX analysis of Sn-Al pewter alloys showed the formation of eutectic structure of Al+βSn led to an increase in hardness and strength of these alloys but deteriorates the ductility. A higher amount of Sn in lead free pewter alloys tends to increase the fluidity length while the addition of Cu and Sb in alloy increases its brightness. The lead free pewter alloy of 92Sn-3Cu-5Sb has higher hardness and strength than others. Hence, this alloy is more suitable to produce large objects that require higher strength and hardness to sustain loading during handling and use. Normally, small object requires high castability to produce a complex shape. Thus, 99Sn-1Cu and 99Sn-1Al alloys are more suitable to produce small objects since they have a higher castability than that of other alloys.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7174
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectFabrication and characterizationen_US
dc.subjectof lead free pewter alloysen_US
dc.titleFabrication And Characterization Of Lead Free Pewter Alloysen_US
dc.typeThesisen_US
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