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Dynamics of microcrack propagation in hardwood during heat treatment investigated by synchrotron-based X-ray tomographic microscopy

Sedighi Gilani, Marjan ; Fife, Julie ; Boone, Matthieu ; Ghazi Wakili, Karim

In: Wood Science and Technology, 2013, vol. 47, no. 5, p. 889-896

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    Titel
    • Dynamics of microcrack propagation in hardwood during heat treatment investigated by synchrotron-based X-ray tomographic microscopy
    Autor
    • Sedighi Gilani, Marjan. Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
    • Fife, Julie. Paul Scherrer Institute (PSI), Villigen, Switzerland
    • Boone, Matthieu. Department of Physics and Astronomy, Ghent University, Ghent, Belgium
    • Ghazi Wakili, Karim. Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Wood Science and Technology, 2013, vol. 47, no. 5, p. 889-896. Springer Berlin Heidelberg
    Andere elektronische Ausgabe
    Klassifikation
    • Technik, Ingenieurwissenschaften
    OAI-PMH-ID
    • oai:doc.rero.ch:321406
    Summary
    The process of crack propagation in wood during pyrolysis is strongly linked to heterogeneities in its hierarchical porous structure. Fundamental understanding of this process is necessary for the analysis of the behavior of wood structural elements during fire exposure. Synchrotron-based X-ray tomographic microscopy combined with a recently developed laser-based furnace at the TOMCAT beamline of the Swiss Light Source provides a unique opportunity to study the heat-induced propagation of microcracks in hardwood in situ with high spatial and temporal resolutions. In this study, attention was focused on the 3D microstructure of beech and the interconnectivity between morphology and cracking patterns. It is shown that thermal cracks initiate mainly along the ray cells in hardwood and in the junction of seasonal growth layers. There is a clear indication of increased total porosity of the wood due to charring