金属熔滴在纳米或原子尺度上的晶体结构

Proceedings of 17th International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 1996-07-21 DOI:10.1109/DEIV.1996.545326

V.N. Shrednik

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引用次数: 0

摘要

由于真空击穿，在金属场发射极上形成带有液滴的微突起是众所周知的。这些微突起可以在阴极和阳极的液体熔融相凝固过程中生长。总结和分析了击穿后液滴(阴极和阳极)表面场发射显微镜的研究结果。考虑到在液滴形成时和液滴形成后材料的高冷却速率，观察到的液滴表面(和体)的特性可以解释为它们的体结构的无序和非晶化，特别是靠近表面的部分。

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Crystal structure of the metal postbreakdown droplets on a nanometric or atomic scale

The formation of microprotrusions with droplets as a result of vacuum breakdown on a metal field emitter is well known. These microprotrusions can grow during solidification of a liquid molten phase both on the cathode and on anode. Results of field emission microscopy investigation of the surface of postbreakdown droplets (both on cathode and anode) are summarized and analysed. Taking into account very high rates of cooling of the material at and directly after droplet formation the observed properties of the droplets surfaces (and the bulk) can be explained as disordering and amorphization of their bulk structure and especially the parts near to the surface.

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Proceedings of 17th International Symposium on Discharges and Electrical Insulation in Vacuum

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