Abstract
The change in porosity during isothermal vacuum annealing of the pseudo alloy W – 18 wt. % Cu obtained by powder metallurgy methods in the temperature range of 800 – 1200 °C and the resistance to oxidation under the action of high-temperature plasma of the outer surface of a hybrid laboratory structure, consisting of two composite elements made of dissimilar materials: graphite and alloy W – 18 wt. % Cu. The process of evolution of the microstructure controlled by diffusion along the internal interfaces (grain and subgrain boundaries) of copper atoms from copper particles located on these surfaces in the near-surface layers of the sample has been studied.
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