Abstract
Crystallographic characteristics have great effects on the performance of directionally solidified Nb-Ti-Si based in-situ composite, which is mainly composed of parallel Nbss/γNb5Si3 eutectic cells along the longitudinal axis of the specimens. Nbss and γNb5Si3 grow up in a coupled manner and exhibit preferred growth orientation along [111]Nb and 0001¯γ zone axes, respectively. Under these orientations, two types of coherent interfaces have been formed between the two phases, corresponding to the different morphologies of γNb5Si3. The preferred growth orientations and coherent interface structures might promote the coupled growth and enhance the stability of the eutectic cells of this in-situ composite.
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