Pressureless Sintering of Powder Processed Graded Metal-Ceramic Composites Using a Nanoparticle Sintering Aid and Bulk Molding Technology

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dc.contributor.advisorBruck, Hughen_US
dc.contributor.authorKruft, Jonathanen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2007-06-22T05:31:42Z
dc.date.available2007-06-22T05:31:42Z
dc.date.issued2007-02-21
dc.description.abstractThe need exists to fabricate graded metal-ceramic composites in bulk manufacturing processes for commercial applications. To address this need, a three-fold approach is employed: (1) control of the evolution of shrinkage strain and mechanical properties through the use of a nanoparticle sintering aid, (2) modeling of shrinkage-induced stresses to determine gradient architectures where cracking does not occur, and (3) fabrication of graded metal-ceramic composites using pressureless sintering and bulk molding technology. A new nanopowder TiO2 sintering aid was introduced to control the evolution of shrinkage and mechanical properties of graded Nickel-Alumina composites. The evolution of shrinkage strain and mechanical properties were then used in a recently developed two-dimensional microthermomechanical finite element analysis to determine the effects on shrinkage-induced stresses and develop gradient architectures where cracking would not occur. Finally, a laboratory-scale processing system based on a commercial bulk molding technology was developed to bulk process geometrically-complex gradient structures.en_US
dc.format.extent7490855 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/6696
dc.language.isoen_US
dc.subject.pqcontrolledEngineering, Materials Scienceen_US
dc.subject.pqcontrolledEngineering, Mechanicalen_US
dc.subject.pquncontrolledfunctionally graded materialen_US
dc.subject.pquncontrolledmetal ceramic compositeen_US
dc.subject.pquncontrollednanoparticle sintering aiden_US
dc.subject.pquncontrolledpressureless sinteringen_US
dc.subject.pquncontrollednickel aluminaen_US
dc.titlePressureless Sintering of Powder Processed Graded Metal-Ceramic Composites Using a Nanoparticle Sintering Aid and Bulk Molding Technologyen_US
dc.typeThesisen_US

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