Abstract
The purpose of this work was to investigate physicochemical conditions of formation and features of structure formation of molybdenum-base composites and, in particular, to study the adhesion characteristics and features of contact interaction in Mo-Cu-Ni(Co) systems, to investigate the distribution of the basic elements and impurities, the phase composition, the structure, and certain properties of the materials and parts. A combination of methods was used including x-ray spectral microanalysis, Auger spectroscopy, x-ray diffraction phase and structure analysis, microhardness and hot hardness methods, scanning electron microscopy, and metallography by optical microscopy. The influence of hot hardness of the composite was selected as the criterion of evaluation and it was found that increases in hot hardness and in high-temperature oxidation increased the life and service properties of electrodes used for spot welding and brazing in production.
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