著者

菅田 栄治 文 道平

出版者

公益社団法人 応用物理学会

雑誌

応用物理 (ISSN:03698009)

巻号頁・発行日

vol.38, no.11, pp.1024-1031, 1969-11-10 (Released:2009-02-20)

参考文献数

10

被引用文献数

1

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The FEM W-tip which initially has the shape of a needle (the radii of curvature 5×10-6_??_1.510-5 cm) was inserted into a special specimen chamber of an electron microscope and the changes of shape by heating were observed over a wide range of temperatures (1600°K_??_2800°K) either continuously or intermittently. The receding rate by the blunting of the tip was determined by an application of Herring's theory on transport phenomena in solid to field emission cathode. It was found from the experimental results that the receding rate of the tip depended on the cone angle. Furthermore, the process of typical changes in the shape of the tip was established, and why a neck formed in the region near the tip could be explained.