Skip to content
University of Maryland LibrariesDigital Repository at the University of Maryland
    • Login
    View Item 
    •   DRUM
    • Theses and Dissertations from UMD
    • UMD Theses and Dissertations
    • View Item
    •   DRUM
    • Theses and Dissertations from UMD
    • UMD Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

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

    Thumbnail
    View/Open
    umi-umd-4167.pdf (7.143Mb)
    No. of downloads: 6867

    Date
    2007-02-21
    Author
    Kruft, Jonathan
    Advisor
    Bruck, Hugh
    Metadata
    Show full item record
    Abstract
    The 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.
    URI
    http://hdl.handle.net/1903/6696
    Collections
    • Mechanical Engineering Theses and Dissertations
    • UMD Theses and Dissertations

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility
     

     

    Browse

    All of DRUMCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister
    Pages
    About DRUMAbout Download Statistics

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility