File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Effects of energy density on morphology and properties of selective laser sintered polycarbonate

TitleEffects of energy density on morphology and properties of selective laser sintered polycarbonate
Authors
Issue Date1999
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jmatprotec
Citation
Journal Of Materials Processing Technology, 1999, v. 89-90, p. 204-210 How to Cite?
AbstractSelective laser sintering (SLS) was used to prepare components from polycarbonate (PC) powder. The effects of energy density of the laser beam, ranging from 0.036 to 0.12 J mm -2, on the physical density, tensile properties and morphology of the sintered specimens were investigated. At low energy density levels, the physical density and tensile strength of the specimens were found to increase with the increase in energy density. Smoke was observed when the components were sintered under an energy density above 0.09 J mm -2, which suggests degradation of the PC powder. These specimens appeared slightly yellow and there was a reduction in the density and tensile strength. In specimens built under a low energy density, scanning electron microscopy (SEM) showed that slight fusion occurred at the surface of the PC particles. The individual particles could be identified and the voids between the particles were interconnected. The crack propagated between the particles during tensile fracture. When the energy density was high, the powder was fused thoroughly which allowed a more dense structure to be built. SEM also showed that fusion was more effective within the individual layers of the PC powder, whilst considerable amounts of voids were present between the layers. Therefore, the strength of the components normal to the layers is expected to be lower than the in-plane strength of the layers. Some wavy circular features were observed on the fracture surfaces of the specimens built under a high energy density. Such features are commonly found on the fracture surfaces of brittle plastics. The work forms a basis for the production of selective laser sintered PC functional products.
Persistent Identifierhttp://hdl.handle.net/10722/156701
ISSN
2015 Impact Factor: 2.359
2015 SCImago Journal Rankings: 1.464
References

 

DC FieldValueLanguage
dc.contributor.authorHo, HCHen_US
dc.contributor.authorGibson, Ien_US
dc.contributor.authorCheung, WLen_US
dc.date.accessioned2012-08-08T08:43:36Z-
dc.date.available2012-08-08T08:43:36Z-
dc.date.issued1999en_US
dc.identifier.citationJournal Of Materials Processing Technology, 1999, v. 89-90, p. 204-210en_US
dc.identifier.issn0924-0136en_US
dc.identifier.urihttp://hdl.handle.net/10722/156701-
dc.description.abstractSelective laser sintering (SLS) was used to prepare components from polycarbonate (PC) powder. The effects of energy density of the laser beam, ranging from 0.036 to 0.12 J mm -2, on the physical density, tensile properties and morphology of the sintered specimens were investigated. At low energy density levels, the physical density and tensile strength of the specimens were found to increase with the increase in energy density. Smoke was observed when the components were sintered under an energy density above 0.09 J mm -2, which suggests degradation of the PC powder. These specimens appeared slightly yellow and there was a reduction in the density and tensile strength. In specimens built under a low energy density, scanning electron microscopy (SEM) showed that slight fusion occurred at the surface of the PC particles. The individual particles could be identified and the voids between the particles were interconnected. The crack propagated between the particles during tensile fracture. When the energy density was high, the powder was fused thoroughly which allowed a more dense structure to be built. SEM also showed that fusion was more effective within the individual layers of the PC powder, whilst considerable amounts of voids were present between the layers. Therefore, the strength of the components normal to the layers is expected to be lower than the in-plane strength of the layers. Some wavy circular features were observed on the fracture surfaces of the specimens built under a high energy density. Such features are commonly found on the fracture surfaces of brittle plastics. The work forms a basis for the production of selective laser sintered PC functional products.en_US
dc.languageengen_US
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jmatprotecen_US
dc.relation.ispartofJournal of Materials Processing Technologyen_US
dc.titleEffects of energy density on morphology and properties of selective laser sintered polycarbonateen_US
dc.typeArticleen_US
dc.identifier.emailCheung, WL:wlcheung@hkucc.hku.hken_US
dc.identifier.authorityCheung, WL=rp00103en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0924-0136(99)00007-2en_US
dc.identifier.scopuseid_2-s2.0-0345476936en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0345476936&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume89-90en_US
dc.identifier.spage204en_US
dc.identifier.epage210en_US
dc.publisher.placeSwitzerlanden_US
dc.identifier.scopusauthoridHo, HCH=7401465514en_US
dc.identifier.scopusauthoridGibson, I=15831816500en_US
dc.identifier.scopusauthoridCheung, WL=7202743084en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats