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Fracture behaviour of Al2O3/SiC nanocomposite ceramics after crack healing treatment

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F08%3A00099516" target="_blank" >RIV/68081723:_____/08:00099516 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216305:26210/08:PU75580

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Fracture behaviour of Al2O3/SiC nanocomposite ceramics after crack healing treatment

  • Original language description

    The self-crack-healing ability was systematically studied using flexural strength measurement of beams containing a semi-elliptical surface crack made by Vickers indenter. Beams of Al2O3/SiC ceramic nanocomposite with a good self-crack-healing ability predetermined for four-point and three-point bend test were prepared by ceramographic techniques. Flexural strength and fracture toughness were determined using three- and four-point bend method. Thermal aging in range from 1000 °C up to 1300 °C for 1 h was applied to find optimal conditions to heal the samples pre-cracked by the indentation technique. Fractographical analyses using an optical and/or scanning electron microscopy has been carried out to investigate the surface crack behaviour. Very good self-crack healing ability has been proved for surface micro-cracks having length up to 250_m and depth no higher than 100 _m.

  • Czech name

    Lomové chování nanokompozitní keramiky typu Al2O3/SiC po žíhaní k zaléčení trhliny

  • Czech description

    Byla systematicky studována schopnost zaléčení povrchových trhlin za použití ohybových vzorků se semieliptickou povrchovou trhlinou připravenou vtiskem Vickersova tvrdoměru. Pro testování pevnosti v ohybu byly použity vzorky pro tří a čtyřbodový ohyb. Pro zaléčování trhlin bylo jako optimální bylo nalezeno žíhání v rozmezí teplot 1000 až 1300 °C. Fraktografická analýza za použití optické a rastrovací elektronové mikroskopie umožnila studium chování povrchových a zaléčených trhlin. Pro trhliny velikosti250 um a hloubky nepřesahující 100 byla zjištěna velmi dobrá zaléčitelnost.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    JH - Ceramics, fire-proof materials and glass

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of the European Ceramic Society

  • ISSN

    0955-2219

  • e-ISSN

  • Volume of the periodical

    28

  • Issue of the periodical within the volume

    5

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    5

  • Pages from-to

    1073-1077

  • UT code for WoS article

  • EID of the result in the Scopus database