Heat-field treatment of tips made of tungsten-hafnium alloy

被引：6

作者：

Golubev, OL ^{[1
]}

Shrednik, VN ^{[1
]}

机构：

[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

来源：

TECHNICAL PHYSICS | 2003年 / 48卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

Evaporation; Tungsten; Combine Effect; Emissivity; Hafnium;

D O I：

10.1134/1.1583834

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The combined effect of a high electric field and a high temperature on the morphology of W-Hf field-emission tips is studied. It is shown that, while the tip reconfiguration stages for this alloy are basically the same as for pure tungsten, they have a number of specific features due to the surface segregation of hafnium. The heat-field treatment of these emitters narrows the solid angle of emission significantly, improves the emissivity of the tips, and is accompanied by the high-temperature evaporation primarily of Hf atoms. (C) 2003 MAIK "Nauka / Interperiodica".

引用

页码：776 / 779

页数：4

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