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- Title
Full strength and toughness recovery after repeated cracking and healing in bone-like high temperature ceramics.
- Authors
Osada, Toshio; Watabe, Aiko; Yamamoto, Joji; Brouwer, Johannes C.; Kwakernaak, Cees; Ozaki, Shingo; van der Zwaag, Sybrand; Sloof, Willem G.
- Abstract
Bones of humans and animals combine two unique features, namely: they are brittle yet have a very high fracture toughness linked to the tortuosity of the crack path and they have the ability to repeatedly heal local fissures such that full recovery of overall mechanical properties is obtained even if the local bone structure is irreversibly changed by the healing process. Here it is demonstrated that Ti2AlC MAX phase metallo-ceramics also having a bone-like hierarchical microstructure and also failing along zig-zag fracture surfaces similarly demonstrate repeated full strength and toughness recovery at room temperature, even though the (high temperature) healing reaction involves the local formation of dense and brittle alumina within the crack. Full recovery of the fracture toughness depends on the healed zone thickness and process zone size formed in the alumina reaction product. A 3-dimensional finite element method (FEM) analysis of the data obtained from a newly designed wedge splitting test allowed full extraction of the local fracture properties of the healed cracks.
- Subjects
MUSCLE strength; CERAMICS; FINITE element method; HIGH temperatures; MICROSTRUCTURE
- Publication
Scientific Reports, 2020, Vol 10, Issue 1, pN.PAG
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-020-75552-1