Heat- and field-induced forming of a tungsten-hafnium alloy

The simultaneous effect of the strong electric fields and high temperatures on the point field emitters from the W-Hf alloy is studied through the field emission methods. In principle the analogous stages of the form changing were identified for such alloys as for the pure metals,through with a number of the characteristic peculiarities, conditioned by the Hf surface segregation. The thermofield treatment of the emitters from such alloys leads to the essential increase in the degree of the emission localization in the narrow solid angle and to the improvement of the emitters emission parameters. The thermofield treatment was accompanied by the high-temperature field evaporation with the emission of primarily Hf ions