CONTROL MODE BY ELECTRON-EMITTING ZONE MELTING AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2009 - IPC C30B13/22 C30B13/32 C22B9/22 

FIELD: metallurgy.

SUBSTANCE: invention relates to control mode by electron-emitting zone melting and device for detection of working value of filament current and it can be used at single crystal growing of transition and refractory metals and its alloys and its vacuum refinement. Method includes heating of electron source by filament current, potential drop application between electron source and carrier of work material, melting of the latter during the regulation of electron stream rate by means of potential drop change between electron source and carrier of work material. Working value of filament current corresponding maximum uniformity of fluxed zone is defined by means of washing of technological anode ensured by application of potential drop between them and electron source up to appearance of visible trace of melting and changing of filament current. Then it is kept established working value of filament current a constant and regulation of electron stream rate during the melting process is implemented at constant working value of filament current. In the device technological anode is implemented in the form of pipe from noncorrosive steel, diametre of which corresponds to diametre of working metal.

EFFECT: increasing of crystallographic property and yield enhancement of single crystals.

2 cl, 2 ex, 1 dwg