Corrosion resistance of modified β-Eucryptite

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dc.contributor.authorBattu, Laurent P.en
dc.contributor.committeechairBrown, Jesse J. Jr.en
dc.contributor.committeememberGordon, Ronald S.en
dc.contributor.committeememberFarkas, Dianaen
dc.contributor.departmentMaterials Engineeringen
dc.date.accessioned2014-03-14T21:42:35Zen
dc.date.adate2009-08-14en
dc.date.available2014-03-14T21:42:35Zen
dc.date.issued1991-04-01en
dc.date.rdate2009-08-14en
dc.date.sdate2009-08-14en
dc.description.abstractThe corrosion resistance of chemically modified β-eucryptite (Li<sub>0.41</sub>Mg<sub>0.035</sub>AlP<sub>0.52</sub>Si<sub>0.48</sub>0₄) having low expansion anisotropy and a near zero coefficient of thennal expansion was evaluated. Samples were exposed to aqueous hydrochloride acid at temperatures up to 100°C and environments containing sodium sulfate up to l000°C. The corrosion resistance was characterized by dilatometry, scanning electron microscopy, X-ray diffraction, energy dispersive x-ray analysis, weight variations, and mechanical properties variations. The results show that modified β-eucryptite is more severely corroded than commercial lithium-alumina-silicate glass-ceramics when exposed to these environments. Aqueous HCI removes AIP04 from modified β-eucryptite leaving a very porous structure. Molten salt corrodes modified β-eucryptite by penetration of sodium and sulfur which form an alkali melt under the surface. The modulus of rupture and the Young's modulus are reduced by both types of corrosion.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 69 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08142009-040239en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08142009-040239/en
dc.identifier.urihttp://hdl.handle.net/10919/44206en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1991.B388.pdfen
dc.relation.isformatofOCLC# 24344529en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.B388en
dc.subject.lcshCeramic materialsen
dc.subject.lcshCorrosion resistant materialsen
dc.subject.lcshInternal combustion engines -- Researchen
dc.titleCorrosion resistance of modified β-Eucryptiteen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMaterials Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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