Heat-Removing and Emitting Compositions Based on W and Pd Powders: a Study of the Production Processes and Structures

Resumo

Ways for advancing the processes of production of heat-removing and emitting compositions based on W and Pd for creating articles for semiconductor and vacuum electronics are considered. It is shown that the widely demanded W – Cu pseudoalloys may exhibit advanced parameters if they are synthesized with the use of the special features of their formation determined in the work by analyzing the structure of the porous refractory skeletons and the infiltration technique. The experimental processes of fabrication of emitting compositions from sintered powders of palladium and Pd5Ba intermetallic are still far from the stage of commercial production due to the absence of expedient modes of thermal deformation treatment for sintered articles of type PdB2, which follows from the data of the studies of their microstructure.