Comparison of temperature and work function measurements obtained with different GTA electrodes
Comparison of temperature and work function measurements obtained with different GTA electrodes
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DOI：
10.1007/bf01447035
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发表时间：
1991-03
影响因子：
3.6
通讯作者：
M. Ushio;A. Sadek;F. Matsuda
中科院分区：
文献类型：
--
作者：
M. Ushio;A. Sadek;F. Matsuda
该工作在一个标准电极（W-ThO 2）和通过添加La 2 O3、CeO 2和Y2 O3而开发的其它电极上进行。从稀土金属氧化物燃弧行为的角度，分析比较了稀土金属氧化物对GTAW电极现象的影响，包括电极温度、发射率和功函数。实验结果表明，电极温度、发射率和功函数强烈地依赖于稀土金属氧化物在燃弧过程中的行为。研究表明，与其他氧化物相比，La_2O_3在燃弧过程中具有良好的稳定性。用红外高温计和槽电极测量了这些电极沿着电极轴向的温度分布。W-La 2 O3电极的温度最低，其次是W-CeO 2和W-ThO 2电极。W-La_2 O_3电极具有较高的发射率和较低的工作结，其次是W-CeO_2和W-Th_2 O_2电极。
This work was carried out on one standard electrode (W-ThO2,) and other electrodes developed by additions of La2O3, CeO2, and Y2O3,. The effect of rare-earth metal oxides on GTAW electrode phenomena, concerning electrode temperature, emissivity, and work function, was analyzed and compared from the point of view of those oxides' behavior during arcing. The experimental results indicate that the electrode temperature, emissivity, and work (unction .strongly depend on the behavior of the rare-earth metal oxides during arcing. The investigation demonstrates good stability of La2O3during arcing compared with the other oxides. The temperature distributions along the electrode axis of these electrodes were measured by using infrared pyrometer and grooved electrodes. The W-La2O3electrode showed the lowest temperature values, followed by W-CeO2and W-ThO2electrodes in that order. Also W-La2O3electrodes have a higher emissivity and lower work Junction, followed by W-CeO2and W-ThO2electrodes in that order.