Show simple item record

dc.contributor.advisorLuhrs, Claudia
dc.contributor.authorCurtin, William J.
dc.dateJun-15
dc.date.accessioned2015-08-05T23:05:28Z
dc.date.available2015-08-05T23:05:28Z
dc.date.issued2015-06
dc.identifier.urihttp://hdl.handle.net/10945/45835
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractIn this thesis, the constrained formation of fibrous nanostructures process was scaled up to fabricate mechanically robust, homogenous foam samples. Scaling up this process required the design of a stainless steel mold capable of maintaining conditions supportive of the carbon nanofiber foam growth such as gas flows, constrained growth area, stable at the temperature and time employed. The gas flow distribution during the growth process was achieved using stainless steel deflectors capable of consistently directing adequate amounts of hydrocarbon to all chamber regions. ANSYS CFX models were used to simulate the gas flows with and without deflectors. Analysis of the experimental variables impact on the foam generation showed that the gas flows and their temperature had a greater influence in the foam robustness than reaction times. Control over the growth variables successfully created an interwoven carbon nanofiber foam material of larger dimensions than previous efforts. The carbon mats microstructures were studied using Scanning Electron Microscopy and their surface area determined by the Brunauer-Emmett-Teller method. The catalyst employed during fabrication was recovered using a leaching method that dissolved the palladium without damaging the carbon foam. The recovery experiment validated the technique as a viable way to reduce manufacturing costs in this process.en_US
dc.publisherMonterey, California: Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleFabrication of a mechanically robust carbon nanofiber foamen_US
dc.typeThesisen_US
dc.contributor.secondreaderHobson, Garth
dc.contributor.departmentMechanical and Aerospace Engineering
dc.contributor.departmentMechanical and Aerospace Engineeringen_US
dc.subject.authorMechanically robust nanofiber foam production methoden_US
dc.description.recognitionOutstanding Thesisen_US
dc.description.recognitionOutstanding Thesisen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameMaster of Science in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record