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为进一步探讨阴极失效的原因,揭示氧化物阴极的发射本质,我们用PHI—550俄歇电子能谱仪对没有经过热处理的氧化物阴极基金属Ni-W-Mg合金以及经过热处理的Ni-W-Mg合金进行了分析。测得的各元素的俄歇电子能谱(AES)和俄歇剖面(AES-PRO)曲线图的结果表明,在上述合金样品的表面存在镁的富集层,而富集的浓度高于体内的平均浓度。同时还发现存在氧的富集层和一贫钨区。此外,为选择合适的基金属处理工艺条件提供了有用的信息。
To further explore the cause of the cathode failure and to reveal the emission nature of the oxide cathode, we used the PHI-550 Auger electron spectrometer to analyze the heat-treated oxide cathode metal Ni-W-Mg alloy and the heat-treated Ni-W -Mg alloy was analyzed. The results of Auger electron spectroscopy (AES) and Auger cross-sectional (AES-PRO) curves of the measured elements showed that there was a magnesium-rich layer on the surface of the above-mentioned alloy sample, and the enrichment concentration was higher than that in the body The average concentration. It is also found that there is an oxygen-rich layer and a lean tungsten zone. In addition, it provides useful information for selecting the appropriate metallization for processing the process conditions.