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Bioinspired nacre-like alumina with a bulk-metallic glass-forming alloy as a compliant phase

Author

Listed:
  • Amy Wat

    (University of California
    Lawrence Berkeley National Laboratory)

  • Je In Lee

    (Seoul National University
    National Institute for Materials Science)

  • Chae Woo Ryu

    (Seoul National University)

  • Bernd Gludovatz

    (UNSW Sydney)

  • Jinyeon Kim

    (Seoul National University
    Korea Institute of Science and Technology)

  • Antoni P. Tomsia

    (Lawrence Berkeley National Laboratory)

  • Takehiko Ishikawa

    (Japan Aerospace Explanation Agency)

  • Julianna Schmitz

    (Institut für Materialphysik im Weltraum, DLR)

  • Andreas Meyer

    (Institut für Materialphysik im Weltraum, DLR)

  • Markus Alfreider

    (Montanuniversität Leoben)

  • Daniel Kiener

    (Montanuniversität Leoben)

  • Eun Soo Park

    (Seoul National University)

  • Robert O. Ritchie

    (University of California
    Lawrence Berkeley National Laboratory)

Abstract

Bioinspired ceramics with micron-scale ceramic “bricks” bonded by a metallic “mortar” are projected to result in higher strength and toughness ceramics, but their processing is challenging as metals do not typically wet ceramics. To resolve this issue, we made alumina structures using rapid pressureless infiltration of a zirconium-based bulk-metallic glass mortar that reactively wets the surface of freeze-cast alumina preforms. The mechanical properties of the resulting Al2O3 with a glass-forming compliant-phase change with infiltration temperature and ceramic content, leading to a trade-off between flexural strength (varying from 89 to 800 MPa) and fracture toughness (varying from 4 to more than 9 MPa·m½). The high toughness levels are attributed to brick pull-out and crack deflection along the ceramic/metal interfaces. Since these mechanisms are enabled by interfacial failure rather than failure within the metallic mortar, the potential for optimizing these bioinspired materials for damage tolerance has still not been fully realized.

Suggested Citation

  • Amy Wat & Je In Lee & Chae Woo Ryu & Bernd Gludovatz & Jinyeon Kim & Antoni P. Tomsia & Takehiko Ishikawa & Julianna Schmitz & Andreas Meyer & Markus Alfreider & Daniel Kiener & Eun Soo Park & Robert , 2019. "Bioinspired nacre-like alumina with a bulk-metallic glass-forming alloy as a compliant phase," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08753-6
    DOI: 10.1038/s41467-019-08753-6
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