Observation of the Grain Boundary in Soap Bubble Raft Part II. Dynamical Behaviour of the Grain Boundary

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概要

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• The dynamical behaviour of the grain boundary is observed in the process of relative displacement between the two grains. Each type of the grain boundaries, classified into three types in respect to their statical transition structure, behaves in discriminatively different manner from each other. The relative displacement between two grains separated by the grain boundary of type A has the Issue of shifting the array of constituent parallel dislocations normal to the boundary. The relative displacement between two grains separated by a straight boundary of type B is accommodated wholly by the independent rearrangement of the bubbles in the boundary layer of a few bubble diameters thickness. As to the grain boundary of type C, the dynamical benaviours of the constituent dislocations can be analysed into two modes. In the mode (i), rather similar to that of type A, the constituent dislocations displace themselves as a whole. In the mode (ii), rather similar to that of type B, the constituent dislocations remain stationary but change frequently their characteristic Burgers' vectors, which is accompanied by local yielding in portions along the grain boundary. The statical feature as well as the dynamical behaviour in the mode (ii) of the grain boundary of type C has much analogies with the Mott's theory on the viscous flow along the grain boundary. To interpret the mode (ii), it is proposed to introduce transient dislocations, traversing along the grain boundary and reacting with the constituent, dislocations. In terms of the transient dislocations the activated state in the process of viscous flow corresponds, to an intermediate stage involving transient dislocations, whence the rate of flow is determined by the energy required to decompose a constituent dislocation to activate a transient dislocation, under favourable influence of the local strain.

• 社団法人日本物理学会の論文
• 1954-02-25

著者

• Fukushima Einosuke

  Department Of Physics Tokyo Metropolitan University

• OOKAWA Akiya

  Department of Physics and Chemistry, Gakushuin University

• Ookawa Akiya

  Department Of Physics And Chemistry Gakushuin Univeisity

関連論文

• Some Characters of the Soap Bubble Raft in a Vibrating State
• Observation of the Grain Boundary in Soap Bubble Raft Part II. Dynamical Behaviour of the Grain Boundary
• Observation of the Grain Boundary in Soap Bubble Raft. : Part III. The Grain Boundary In Vibrating State
• A Model Theory of Liquid
• Crystallization and Melting of Linear High Polymers as Rate Processes.
• On the Mechanism of Deformation Twin in fcc Crystal
• Notes on the Crystallite Theory of Liquid

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