A new method of wettability measurement utilizing a small sample and its application to graphite or .ALPHA.-SiC and liquid Cu-Cr alloy systems.

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  • Nogi Kiyoshi
    Department of Materials Science and Processing, Faculty of Engineering, Osaka University
  • Osugi Yasuo
    Osaka University
  • Ogino Kazumi
    Department of Materials Science and Processing, Faculty of Engineering, Osaka University

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The wettability of graphite and single crystal of α-SiC by liquid Cu-Cr alloy was investigated using the sessile drop method and the vertical plate method which was developed in this work.<br>Main results are as follows;<br>(1) The vertical plate method was proved to be applicable for the wetting system whose contact angle is acute.<br>(2) The wettability of graphite by liquid Cu-Cr alloy dramatically changed at c.a. 0.3mass%Cr.<br>(3) Electron probe microanalysis of the Cu-Cr alloy and graphite system revealed that Cr had concentrated at the interface.<br>(4) Contact angles between liquid Cu-Cr alloys and single crystal of α-SiC were 10° and 10-20° at 0.23mass%Cr and 0.75mass%Cr, respectively.

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