Interface interactions in layered composites Nb-Al{sub}2O{sub}3 and Nb(1%Zr)-Al{sub}2O{sub}3 upon high-temperature annealing

摘要

The results of studying the interaction of Nb and Nb-based alloy (1% Zr) with pure alumina ceramics in layered composites upon vacuum annealing within the interval of 1770-2070 K are presented. The cylindrical samples were obtained using plasmadeposition of ceramics and high-temperature isostatic pressing of the pack through the metal shell. The microstructure, phase composition of the layers in contact as well as mass drag-out from the near-contact zones at the terminate edges of the samplesare studied. Using the data obtained we made conclusion concerning with the reasons for different behavior of the samples with pure and alloyed Nb.