Ceramic composition, cutting tool, and tool for friction stir welding
AssigneeNgk Spark Plug Co., Ltd.
InventorsYusuke KATSU, Toshiaki KURAHASHI, Hideto YAMADA, Takeshi MITSUOKA
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Abstract
An object of the present disclosure is to improve the properties of a ceramic composition. A ceramic composition contains alumina (Al2O3) and tungsten carbide (WC) and is characterized in that an atomic layer formed of at least one element selected from among transition metals belonging to Groups 4 to 6 of the periodic table, yttrium (Y), scandium (Sc), and lanthanoids is present at a crystal grain boundary between an alumina (Al2O3) crystal grain and a tungsten carbide (WC) crystal grain.
Claims11
A ceramic composition comprising alumina (Al2O3) and tungsten carbide (WC), the ceramic composition being characterized in that:
- an atomic layer formed of at least one element selected from among transition metals belonging to Groups 4 to 6 of the periodic table, yttrium (Y), scandium (Sc), and lanthanoids is present at the crystal grain boundary between an alumina (Al2O3) crystal grain and a tungsten carbide (WC) crystal grain.
Dependencies are inferred from the claim text.