Electron microscopy analysis of crack propagation behavior of alumina

H. Matsuo, M. Mitsuhara, K. Ikeda, S. Hata, H. Nakashima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Macroscopic features of crack propagation behavior in polycrystalline alumina (poly-alumina) and alumina single crystals (single-alumina) were analyzed by scanning electron microscopic electron back-scattered diffraction (SEM-EBSD) analysis. It was revealed that the intergranular fracture behavior is independent on grain boundary characters. When the cracks are propagated in the grains of poly- or single-alumina, zigzag cracks were produced. The zigzag cracks are composed of fracture surfaces formed along the cleavage planes. Microscopic features of fracture surfaces formed in a single-alumina were observed in detail by electron tomography combined with high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). It was by visualized that the zigzag cracks were composed of flat and uneven fracture surfaces at a nm scale. The flat fracture surfaces and uneven ones were nearly parallel to the cleavage plane, {11̄02}, and the basal plane, {0001}, respectively.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition MS and T'08
Pages753-761
Number of pages9
Publication statusPublished - Dec 1 2008
EventMaterials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States
Duration: Oct 5 2008Oct 9 2008

Publication series

NameMaterials Science and Technology Conference and Exhibition, MS and T'08
Volume2

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'08
CountryUnited States
CityPittsburgh, PA
Period10/5/0810/9/08

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials

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  • Cite this

    Matsuo, H., Mitsuhara, M., Ikeda, K., Hata, S., & Nakashima, H. (2008). Electron microscopy analysis of crack propagation behavior of alumina. In Materials Science and Technology Conference and Exhibition MS and T'08 (pp. 753-761). (Materials Science and Technology Conference and Exhibition, MS and T'08; Vol. 2).