…A typical example is alumina Al 2 O 3 , sintered using conventional ceramic manufacturing methods. Alumina cutting tools are ceramics that take advantage of the hardness of alumina, and their performance has improved dramatically compared to conventional metal cutting tools. They were created by combining the hardness of stone tools with improvements in the techniques used to make earthenware, and can be said to inherit the dominant genetic characteristics of the contrasting non-metallic inorganic materials of stone and earth. … *Some of the terminology used to refer to "alumina cutting tools" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…代表的なものに,アルミナAl2O3を原料として,従来の陶磁器製造法を援用して焼結させたものがある。アルミナの硬いという特性を生かしたセラミックスがアルミナ切削工具であり,従来の金属系切削工具に比べ性能が飛躍的に向上した。石器のもっていた硬いという機能と土器をつくる手法を進歩させて生みだされたものであり,石と土という対照的な非金属無機質素材の特徴を優性遺伝的に受け継いだものといえる。… ※「アルミナ切削工具」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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