Laser Metal Additive Manufacturing on Graphite

dc.creatorAzizi, Arad
dc.creatorSchiffres, Scott N.
dc.date.accessioned2021-11-16T14:59:50Z
dc.date.available2021-11-16T14:59:50Z
dc.date.issued2018
dc.description.abstractMetal powders are typically directly fused to a metal substrate of similar composition in metal powder-bed fusion additive manufacturing. This work presents a process for printing a metal alloy directly on graphite, rather than a metal platform. This technology has attractive applications to heat transfer, as this process can be used to directly print heat sinks or heat exchangers on pyrolytic graphite. The heat transfer applications of metal-pyrolytic graphite are enormous, as pyrolytic graphite has the second highest thermal conductivity (>1700 W/m-K at room temperature) of any bulk material, with only expensive diamond exceeding it. Bonding of common metal alloys used in additive manufacturing and graphite are relatively weak and possess high contact angles. However, by using the proper interlayer material, wettability and reactivity of the graphite substrate with metal powder can increase drastically. The alloys that can typically bond to graphite require extended times at elevated temperatures (minutes to hours), while this study demonstrates rapid bonding (~100 µs).en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/90304
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/17225
dc.language.isoengen_US
dc.publisherUniversity of Texas at Austinen_US
dc.relation.ispartof2018 International Solid Freeform Fabrication Symposiumen_US
dc.rights.restrictionOpenen_US
dc.subjectmaterial bondingen_US
dc.subjectpowder bed fusionen_US
dc.subjectselective laser meltingen_US
dc.subjectSLMen_US
dc.subjectlaser material processingen_US
dc.subjectgraphite-metal bondingen_US
dc.titleLaser Metal Additive Manufacturing on Graphiteen_US
dc.typeConference paperen_US

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