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Effects of lubrication in warm powder compaction process

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dc.citedby4
dc.contributor.authorRahman M.M.en_US
dc.contributor.authorNor S.S.M.en_US
dc.contributor.authorRahman H.Y.en_US
dc.contributor.authorid55328831100en_US
dc.contributor.authorid23492827600en_US
dc.contributor.authorid7101793656en_US
dc.date.accessioned2023-12-28T07:05:48Z
dc.date.available2023-12-28T07:05:48Z
dc.date.issued2011
dc.description.abstractWarm compaction is an advanced manufacturing technique which consists of two consecutive steps, i.e. powder compaction at above ambient temperature and sintering in a controlled environment. Due to the relative movement between the powder mass and die wall as well as sliding among powder particles, frictional force is generated during the compaction stage. Admixed lubricant is used during the compaction step in order to minimize friction and hence improve the uniformity of the density of distribution inside the component. However, during the sintering process, trapped lubricant is often found to be burnt out hence leaving pores or voids which result in the lower strength of the final products. Warm compaction was initiated in the nineties, however not much information has been published about the effects of lubrication on the quality of the components produced through this route. Therefore, this paper presents the outcome of an experimental investigation about the effects of lubrication on manufacturing near-net shape components through the warm compaction route. Iron powder ASC 100.29 was mixed mechanically with zinc stearate to prepare the feedstock. Mixing time, weight percentage of lubricant content and compaction temperature were varied during green compact generation while sintering temperature, heating rate and holding time were manipulated during sintering. The relative densities and strengths of the final products were investigated at every compaction as well as sintering parameter. The results revealed that lubrication could provide significant effects at the compaction temperature of 180�C while no significant effect of lubrication was observed during sintering. The suitable lubricant content was found to be 0.4 wt% and mixing time was around 30 min and the sintering temperature was around 990�C. � Academy of Sciences Malaysia.en_US
dc.description.natureFinalen_US
dc.identifier.epage18
dc.identifier.issue1
dc.identifier.scopus2-s2.0-80355140868
dc.identifier.spage11
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-80355140868&partnerID=40&md5=0beefffac4bfd22b70238aa0403357b4
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/29608
dc.identifier.volume5
dc.pagecount7
dc.sourceScopus
dc.sourcetitleASM Science Journal
dc.subjectCooling
dc.subjectDensity
dc.subjectFriction
dc.subjectFull cycle
dc.subjectGreen compact
dc.subjectHeat
dc.subjectLubrication
dc.subjectMixing time
dc.subjectRate
dc.subjectSintering
dc.subjectStrength
dc.subjectWarm compaction
dc.titleEffects of lubrication in warm powder compaction processen_US
dc.typeArticleen_US
dspace.entity.typePublication
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