Electromicroscopie de la Surface d'une Cassure de Verre (II)

概要

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The mirror surface appearing at the starting point of a crack produced in a glass rod is observed through the electron microscope by the method of the methyl methacrylate-aluminium-chrome shadow casting replica. First, photographs were taken of the entire view of the replica sample with the low magnification and then each part of mirror surface with the magnification of 400〜500 and next with the much higher magnification. Comparing these photographs with each other, we are led to notice the morphological variation of the glass fracture surface from place to place. We observed especially the small circular bodies which appeared on the flat part of the fracture surface. It is presumed that these small bodies do not exist actually on the fracture surface but arise from some secondary reaction between the fresh smooth fracture surface of glass and the replica material. Special forms of cracks such as fiber, comb, foil, feather, arch etc. were observed.
社団法人日本物理学会の論文
1954-02-25