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dc.contributor.advisorFox, A.G.
dc.contributor.authorHunt, Richard K.
dc.dateSeptember, 1994
dc.date.accessioned2013-04-26T19:00:13Z
dc.date.available2013-04-26T19:00:13Z
dc.date.issued1994-09
dc.identifier.urihttp://hdl.handle.net/10945/30944
dc.description.abstractSodium Sulfate hot corrosion of a SiC/LAS composite was studied using conventional transmission electron microscopy and selected area diffraction. Changes in the morphology, composition and crystallography of the phases in the glass-ceramic matrix and the fiber/matrix interface were studied. Microchemical analysis using energy dispersive x-ray spectroscopy (EDS) was also performed on all phases detected. Three samples were studied: (1) as-received, (2) no salt coating and annealed in argon, and (3) sodium sulfate coated and annealed in oxygen. Both heat treatments were performed at 900 C for 100 hours. Sample (1) matrix was comprised of small stoichiometric grains of beta-spodumene (Li2O- Al2O3-4SiO2) and mullite (3Al2O32SiO2) in a high silica glass (88 wt% SiO2 and 12 wt% Al203). The fiber/matrix interface consisted of an amorphous SiO2 and graphitic carbon layer. Sample (2) showed a substantial decrease in mullite content with a concomitant increase in alumina content of the glass and crystalline phases. Lithium aluminosilicate, SiC Fiber-reinforced composites.en_US
dc.description.urihttp://archive.org/details/atransmissionele1094530944
dc.format.extent75 p.;28 cm.en_US
dc.language.isoen_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. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleA transmission electron microscope characterization of sodium sulfate hot corrosion of silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic matrix compositeen_US
dc.typeThesisen_US
dc.contributor.secondreaderNA
dc.contributor.corporateNA
dc.contributor.departmentMechanical Engineering
dc.subject.authorNAen_US
dc.description.funderNAen_US
dc.description.recognitionNAen_US
dc.description.serviceU.S. Coast Guard (U.S.C.G.) author.en_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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