In this work the destruction mechanism of a pure tungsten cathode during the initiation of direct current arc is studied. The experimental work shows that the cathode resides in liquid form during the initiation of the arc, and the process of its destruction happens by ejecting droplets from its surface with the following explosion. The average speed of the ejection and the temperature at the explosion points microseconds before the explosion were registered. A mathematical model is proposed explaining the reason behind the droplets formation.

中文翻译：

---

直流电弧起弧期间从纯钨阴极表面排出物质的机理

在这项工作中，研究了纯钨阴极在直流电弧引发期间的破坏机理。实验工作表明，在电弧起弧期间，阴极以液态形式存在，其破坏过程是通过随后爆炸将液滴从其表面喷射而发生的。记录爆炸前微秒的平均喷射速度和爆炸点的温度。提出了一个数学模型来解释液滴形成的原因。