Discrimination of Ceramics—Study on the Microstructures of Ceramics

    Volume 39, Issue 3 (May 1994)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Page Count: 15


    Deki, S
    Forensic Chemist, Forensic Science Laboratory, Hyogo Pref. Police Department, Kobe,

    Hashimoto, T
    Forensic Chemist, Forensic Science Laboratory, Hyogo Pref. Police Department, Kobe,

    Kanaji, Y
    Assistant Professor and Professor, Fac. of Engineering, Kobe University, Kobe,

    (Received 15 June 1993; accepted 15 November 1993)

    Abstract

    A method for discrimination of alumina ceramics was developed based on the observation of the surface morphology of etched surfaces, density, X-ray diffraction line profiles and grain size distributions.

    The experimental observations of the surface microstructure were made, using the scanning electron microscopy (SEM), on several different alumina ceramics with high (>99%), middle (96 to 98%) and low (approximately 92%) alumina content in order to identify them. The samples were prepared with a sulfuric acid (4.5 mol/L) etching method performed at 150 ≈ 200°C for 2 h on low and middle purity alumina ceramics and for 4 h on high purity alumina ceramics.

    The results indicate that the SEM observation coupled with computerized image analysis to determine grain size distribution is a powerful tool to discriminate among alumina ceramics that exhibit similar morphological characteristics.

    The X-ray diffraction line profile study is suggested as an additional useful index for the determination of microcrystalline structure.


    Paper ID: JFS13660J

    DOI: 10.1520/JFS13660J

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    Title Discrimination of Ceramics—Study on the Microstructures of Ceramics
    Symposium , 0000-00-00
    Committee E30