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    Methods of Utilizing Earth-Abundant and Lunar Minerals in Material Extrusion-Based Additive Manufacturing

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    Author
    Hayes, Anna K.
    Issue Date
    2019
    Keywords
    additive manufacturing
    fused deposition modeling
    in situ resource utilization
    robocasting
    Advisor
    Muralidharan, Krishna
    Potter, Barrett G.
    
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    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction, presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Additive manufacturing methods have great potential for rapid production of parts and devices in remote areas with limited access to supply chains. This work examines the use of mineral resources for inexpensive and low-energy additive manufacturing. Silica, basalt, and Lunar regolith simulant (LRS) were processed for use as additive manufacturing feedstock in conjunction with polymeric binders. Mineral powders were chemically functionalized and combined with acrylonitrile butadiene styrene (ABS) at filler loadings up to 5 wt.% to create 3D printed structures using the fused deposition modeling (FDM) process. The mechanical properties of the resulting structures were characterized by tensile testing and analysis of fracture surfaces. Alternatively, processed minerals were used to prepare inks for robocasting using Pluronic F127 hydrogels as a carrier. Minerals were added in increasing concentrations to determine the maximum filler loading that could be used to create an ink with suitable viscosity for the robocasting process. Hydrogels containing 52-57 wt.% mineral fillers were used as feedstock. By sintering the 3D printed green bodies, structural ceramics may be produced using this process. This work provides methods for producing structures and devices on demand in hostile environments through efficient in situ resource utilization.
    Type
    text
    Electronic Thesis
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Materials Science & Engineering
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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