…Therefore, the dislocation line is not broken inside the crystal, but forms a closed loop or appears on the surface. When the dislocation line and the Burgers vector are parallel, the dislocation is called a screw dislocation, and the atomic planes perpendicular to the dislocation line are arranged in a spiral shape around the dislocation line (Figure 2, a). In contrast, when the dislocation line and the Burgers vector are at right angles, the dislocation is called an edge dislocation, and an extra atomic plane appears to have intruded in like an edge (Figure 2, b). … *Some of the terminology that refers to "screw dislocation" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…したがって,転位線は,結晶の中でとぎれることはなく,閉じたループになっているか,あるいは表面に出てしまう。転位線とバーガース・ベクトルが平行のとき,その転位をらせん転位screw dislocationといい,転位線に垂直な原子面は転位線のまわりでらせん状に配列する(図2のa)。これに対して転位線とバーガース・ベクトルが直角の場合を刃状転位edge dislocationといい,1枚の余分な原子面が刃状に入り込んだようになっている(図のb)。… ※「screw dislocation」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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