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dc.contributor.advisorPorter, Jason M.
dc.contributor.advisorMishra, Brajendra
dc.contributor.authorBlackwood, Van Stephen
dc.date.accessioned2007-01-03T06:28:04Z
dc.date.accessioned2022-02-09T08:56:42Z
dc.date.available2007-01-03T06:28:04Z
dc.date.available2022-02-09T08:56:42Z
dc.date.issued2014
dc.date.submitted2014
dc.identifierT 7522
dc.identifier.urihttps://hdl.handle.net/11124/438
dc.description2014 Spring.
dc.descriptionIncludes illustrations (some color).
dc.descriptionIncludes bibliographical references (pages 95-103).
dc.description.abstractThe objective of this research was to develop and recommend a metallic nuclear fuel candidate that lowered the onset temperature of [gamma] phase formation comparable or better than the uranium-10 wt. pct. molybdenum alloy, offered a solidus temperature as high or higher than uranium-10 wt. pct. zirconium (1250 degrees C), and stabilized the fuel phase against interaction with iron and steel at least as much as uranium-10 wt. pct. zirconium stabilized the fuel phase. Two new as-cast alloy compositions were characterized to assess thermal equilibrium boundaries of the [gamma] phase field and the effect of carbon addition up to 0.22 wt. pct. The first system investigated was uranium- x wt. pct. M where x ranged between 5-20 wt. pct. M was held at a constant ratio of 50 wt. pct. molybdenum, 43 wt. pct. titanium, and 7 wt. pct. zirconium. The second system investigated was the uranium-molybdenum-tungsten system in the range 90 wt. pct. uranium - 10 wt. pct. molybdenum - 0 wt. pct. tungsten to 80 wt. pct. uranium - 10 wt. pct. molybdenum - 10 wt. pct. tungsten. The results showed that the solidus temperature increased with increased addition of M up to 12.5 wt. pct. for the uranium-M system. Alloy additions of titanium and zirconium were removed from uranium-molybdenum solid solution by carbide formation and segregation. The uranium-molybdenum-tungsten system solidus temperature increased to 1218 degrees C at 2.5 wt. pct. with no significant change in temperature up to 5 wt. pct. tungsten suggesting the solubility limit of tungsten had been reached. Carbides were observed with surrounding areas enriched in both molybdenum and tungsten. The peak solidus temperatures for the alloy systems were roughly the same at 1226 degrees C for the uranium-M system and 1218 degrees C for the uranium-molybdenum-tungsten system. The uranium-molybdenum-tungsten system required less alloy addition to achieve similar solidus temperatures as the uranium-M system.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2010-2019 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectmolybdenum
dc.subjectnuclear
dc.subjecttitanium
dc.subjecttungsten
dc.subjecturanium
dc.subjectzirconium
dc.subject.lcshNuclear fuels
dc.subject.lcshUranium alloys
dc.subject.lcshMolybdenum
dc.subject.lcshBreeder reactors
dc.subject.lcshMaterials -- Thermal properties
dc.subject.lcshPhase transformations (Statistical physics)
dc.titleAs-cast uranium-molybdenum based metallic fuel candidates and the effects of carbon addition
dc.typeText
dc.contributor.committeememberOlson, D. L. (David LeRoy)
dc.contributor.committeememberLiu, Stephen
dc.contributor.committeememberMustoe, Graham G. W.
dc.contributor.committeememberMiller, Hugh B.
thesis.degree.nameDoctor of Philosophy (Ph.D.)
thesis.degree.levelDoctoral
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorColorado School of Mines


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