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Corrosion resistance of NZP and aluminum titanate

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dc.contributor.authorLu, Yangshengen
dc.contributor.committeechairHirschfeld, Deidre A.en
dc.contributor.committeememberBrown, Jesse J. Jr.en
dc.contributor.committeememberKampe, Stephen L.en
dc.contributor.departmentMaterials Science and Engineeringen
dc.date.accessioned2014-03-14T21:47:06Zen
dc.date.adate2005-10-07en
dc.date.available2014-03-14T21:47:06Zen
dc.date.issued1996-09-05en
dc.date.rdate2005-10-07en
dc.date.sdate2005-10-07en
dc.description.abstractTo determine the feasibility of using low thermal expansion ceramics and aluminum titanate in diesel engine applications, the mechanical and thermal properties and corrosion resistance were evaluated. NZP (Ba<sub>1.25</sub>Zr₄P<sub>5.5</sub>Si<sub>.0.5</sub>0₂₄ and Ca<sub>0.5</sub> Sr<sub>O.5</sub>Zr₄P₆0₂₄) and aluminum titanate (AT) were exposed to a simulated diesel engine environment. The effects of thermal cycling from room temperature to 700°C, and a combination of alkali corrosion and thermal cycling on the mechanical and thermal properties of these ceramics were examined. It was found that NZP and AT materials demonstrated near zero bulk thermal expansion, good thermal up shock resistance and resistance to Na and V corrosion, because of their porous structure and low density. However, the AT materials exhibited lower flexural strength. This is a direct result of the inherent micro cracking across the AT grains upon cooling from the sintering temperature, which reduces the flexural strength and elastic modulus.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 68 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10072005-094847en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10072005-094847/en
dc.identifier.urihttp://hdl.handle.net/10919/45079en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1996.L8.pdfen
dc.relation.isformatofOCLC# 36436557en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectdiesel engine applicationsen
dc.subjectthermal propertiesen
dc.subject.lccLD5655.V855 1996.L8en
dc.titleCorrosion resistance of NZP and aluminum titanateen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMaterials Science and Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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