X-RAY TUBE ANODE MANUFACTURING PROCESS Russian patent published in 2002 - IPC

FIELD: roentgen engineering for medicine and other industries. SUBSTANCE: anode surface is covered with doping element layer, 2-4 mcm thick, in vicinity of focusing track followed by isometric firing of anode for 5-45 h at temperature lower than recrystallization point of anode material. Doping element is applied to anode surface by evaporation using magnetron, vacuum-thermal, laser, plasma, or other method, or method of powder metallurgy. Re is chosen as doping element. Cone-shaped lid of single-crystalline material is tightly fitted to anode surface prior to firing procedure so as to reduce loss of doping element in the course of firing. EFFECT: enhanced service life (number of cycles to failure), reduced consumption of expensive doping element such as rhenium. 4 cl