Mechanical responses of architected boron carbide-aluminum lattice composites fabricated via reactive metallic infiltration of hierarchical pore structures

The incorporation of micro and nanoscale constituents in a hierarchical order improves mechanical properties of bulk structures while inducing controlled deformation. However, these features have seldomly been applied to the fabrication of cermet materials due to manufacturing constraints. Overcomin...

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Bibliographic Details
Published in:Materials today communications 2023-12, Vol.37, p.107550, Article 107550
Main Authors: Rivera, Jesus, Yang, Qirong, Bustillos, Christian G., Chandrasekaran, Swetha, Wat, Amy, Sobalvarro, Elizabeth M., Worsley, Marcus A., Pascall, Andrew J., Kuntz, Joshua D.
Format: Article
Language:English
Subjects:
Additive manufacturing
Cermet
Flexural
Gelcasting
Lattice
MATERIALS SCIENCE
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Summary:The incorporation of micro and nanoscale constituents in a hierarchical order improves mechanical properties of bulk structures while inducing controlled deformation. However, these features have seldomly been applied to the fabrication of cermet materials due to manufacturing constraints. Overcoming previous limitations, boron carbide cermets with embedded aluminum lattices were produced using a combination of additive manufacturing and gelcasting techniques. Kelvin cell and octet truss scaffolds were printed, cast and burned out so the negative volume could be infiltrated with metal to form an architected cermet. Computed microtomography scans reveal full aluminum infiltration of the volume with high fidelity to the target architecture. Equibiaxial flexural tests showed localized crack propagation in lattice-reinforced cermets and that samples with imbedded architecture required nearly double the energy for complete failure. Overall, the addition of an internal aluminum lattice limits abrupt fracture of the composite and provides a method for tuning its mechanical response with architected ratios of metal to ceramic. [Display omitted] •Cermets with embedded aluminum lattices were produced using a combination of additive manufacturing and gelcasting.•Equibiaxial flexural strength tests indicate stable failure in lattice-reinforced cermets with localized crack propagation.•Incorporation of architected metallic lattices assisted in the mitigation of abrupt through thickness failure.
ISSN:2352-4928
2352-4928
DOI:10.1016/j.mtcomm.2023.107550