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Toughening brittle materials through heterogeneous interfacial modification
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Frey, Caleb Lucas Stalder. Toughening brittle materials through heterogeneous interfacial modification. Retrieved from https://doi.org/doi:10.7282/t3-ns47-na11

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TitleToughening brittle materials through heterogeneous interfacial modification
NameFrey, Caleb Lucas Stalder (author); Sills, Ryan (chair); Riman, Richard E (member); Matthewson, Michael J (member); Sills, Ryan B (member); Rutgers University; School of Graduate Studies
Date Created2022
Other Date2022-05 (degree)
SubjectMaterials Science, Cohesive surface, Composites
Extent78 pages : illustrations
DescriptionThe holy grail of material science and engineering is to produce strong, tough materals. Such materials would be able to withstand high stresses, and if their limit was exceeded, deform and crack without catastrophic failure. Biomaterials such as nacre in molliusk shells, bones, and teeth all benefit from a brick-and-mortar microstructure where ceramic bricks provide strength and stiffness, while an intermediate layer of biopolymer provides limited slip, resulting in high toughness. This is possiible thanks to the "bottom up" nature of biological processes, allowing for complex multi-scale structures to be produced. In this research, the heterogeneous surface modification model was developed, in which certain ceramic grains have modified surface properties, resulting in increased macroscopic toughening. This model was simulated using Abaqus Finite Element Analysis software, and utilized the cohesive surface approach. The parameters of interest were the relative strength and toughness of the modifiers, and the fraction of modified grains, which were varied to determine the ideal permutation to maximize extrinsic toughening of the material.The core findings of this research were that the ideal modifiers have a high relative toughness but low relative strength, and that the proportion of modified grains is less sensitive as the relative toughness increases. These simulations may be expanded in the future to determine the ideal modifier proportion to maximize toughness while miminizing the impact of the weakened modifier. They may also be validated through a cooperation with Prof. R. E. Riman, whose low temperature solidification techniques may make it possible to test additives that would not survive a traditional sintering process.
NoteM.S.
NoteIncludes bibliographical references
NoteIncludes vita
Genretheses
Persistent URLhttps://doi.org/doi:10.7282/t3-ns47-na11
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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