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  • Nanofluid based optical sensor for rapid visual inspection of defects in ferromagnetic materials
    Vellaichamy, Mahendran ; Philip, John
    We have developed a simple sensor for imaging internal defects in materials using a magnetically polarizable nanoemulsion. The gradient in the magnetic flux lines around the defective region leads to ... the formation of one-dimensional nanodroplet arrays along the field direction, which incredibly diffract the incident white light to produce bright colors. As the diffracted wavelength has a direct correlation with the defect features, this approach enable visual inspection of ferromagnetic components and has several advantages over existing flux leakage sensors in terms of cost, re-usability and complexity.
    Source: Applied physics letters. - ISSN 0003-6951 (Vol. 100, Art. 073104, 2012)
    Type of material - article, component part
    Publish date - 2012
    Language - english
    COBISS.SI-ID - 77170691
    DOI